David S. Miller [Thu, 25 Sep 2014 04:05:30 +0000 (21:05 -0700)]
sparc64: Fix hibernation code refrence to PAGE_OFFSET.
We changed PAGE_OFFSET to be a variable rather than a constant,
but this reference here in the hibernate assembler got missed.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Sun, 19 Oct 2014 03:12:33 +0000 (23:12 -0400)]
sparc64: Do not define thread fpregs save area as zero-length array.
[ Upstream commit
e2653143d7d79a49f1a961aeae1d82612838b12c ]
This breaks the stack end corruption detection facility.
What that facility does it write a magic value to "end_of_stack()"
and checking to see if it gets overwritten.
"end_of_stack()" is "task_thread_info(p) + 1", which for sparc64 is
the beginning of the FPU register save area.
So once the user uses the FPU, the magic value is overwritten and the
debug checks trigger.
Fix this by making the size explicit.
Due to the size we use for the fpsaved[], gsr[], and xfsr[] arrays we
are limited to 7 levels of FPU state saves. So each FPU register set
is 256 bytes, allocate 256 * 7 for the fpregs area.
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Wed, 15 Oct 2014 02:37:58 +0000 (19:37 -0700)]
sparc64: Fix FPU register corruption with AES crypto offload.
[ Upstream commit
f4da3628dc7c32a59d1fb7116bb042e6f436d611 ]
The AES loops in arch/sparc/crypto/aes_glue.c use a scheme where the
key material is preloaded into the FPU registers, and then we loop
over and over doing the crypt operation, reusing those pre-cooked key
registers.
There are intervening blkcipher*() calls between the crypt operation
calls. And those might perform memcpy() and thus also try to use the
FPU.
The sparc64 kernel FPU usage mechanism is designed to allow such
recursive uses, but with a catch.
There has to be a trap between the two FPU using threads of control.
The mechanism works by, when the FPU is already in use by the kernel,
allocating a slot for FPU saving at trap time. Then if, within the
trap handler, we try to use the FPU registers, the pre-trap FPU
register state is saved into the slot. Then at trap return time we
notice this and restore the pre-trap FPU state.
Over the long term there are various more involved ways we can make
this work, but for a quick fix let's take advantage of the fact that
the situation where this happens is very limited.
All sparc64 chips that support the crypto instructiosn also are using
the Niagara4 memcpy routine, and that routine only uses the FPU for
large copies where we can't get the source aligned properly to a
multiple of 8 bytes.
We look to see if the FPU is already in use in this context, and if so
we use the non-large copy path which only uses integer registers.
Furthermore, we also limit this special logic to when we are doing
kernel copy, rather than a user copy.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Fri, 10 Oct 2014 19:49:16 +0000 (15:49 -0400)]
sparc64: Fix lockdep warnings on reboot on Ultra-5
[ Upstream commit
bdcf81b658ebc4c2640c3c2c55c8b31c601b6996 ]
Inconsistently, the raw_* IRQ routines do not interact with and update
the irqflags tracing and lockdep state, whereas the raw_* spinlock
interfaces do.
This causes problems in p1275_cmd_direct() because we disable hardirqs
by hand using raw_local_irq_restore() and then do a raw_spin_lock()
which triggers a lockdep trace because the CPU's hw IRQ state doesn't
match IRQ tracing's internal software copy of that state.
The CPU's irqs are disabled, yet current->hardirqs_enabled is true.
====================
reboot: Restarting system
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3536 check_flags+0x7c/0x240()
DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
Modules linked in: openpromfs
CPU: 0 PID: 1 Comm: systemd-shutdow Tainted: G W 3.17.0-dirty #145
Call Trace:
[
000000000045919c] warn_slowpath_common+0x5c/0xa0
[
0000000000459210] warn_slowpath_fmt+0x30/0x40
[
000000000048f41c] check_flags+0x7c/0x240
[
0000000000493280] lock_acquire+0x20/0x1c0
[
0000000000832b70] _raw_spin_lock+0x30/0x60
[
000000000068f2fc] p1275_cmd_direct+0x1c/0x60
[
000000000068ed28] prom_reboot+0x28/0x40
[
000000000043610c] machine_restart+0x4c/0x80
[
000000000047d2d4] kernel_restart+0x54/0x80
[
000000000047d618] SyS_reboot+0x138/0x200
[
00000000004060b4] linux_sparc_syscall32+0x34/0x60
---[ end trace
5c439fe81c05a100 ]---
possible reason: unannotated irqs-off.
irq event stamp: 2010267
hardirqs last enabled at (2010267): [<
000000000049a358>] vprintk_emit+0x4b8/0x580
hardirqs last disabled at (2010266): [<
0000000000499f08>] vprintk_emit+0x68/0x580
softirqs last enabled at (2010046): [<
000000000045d278>] __do_softirq+0x378/0x4a0
softirqs last disabled at (2010039): [<
000000000042bf08>] do_softirq_own_stack+0x28/0x40
Resetting ...
====================
Use local_* variables of the hw IRQ interfaces so that IRQ tracing sees
all of our changes.
Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Sun, 5 Oct 2014 04:05:14 +0000 (21:05 -0700)]
sparc64: Fix reversed start/end in flush_tlb_kernel_range()
[ Upstream commit
473ad7f4fb005d1bb727e4ef27d370d28703a062 ]
When we have to split up a flush request into multiple pieces
(in order to avoid the firmware range) we don't specify the
arguments in the right order for the second piece.
Fix the order, or else we get hangs as the code tries to
flush "a lot" of entries and we get lockups like this:
[ 4422.981276] NMI watchdog: BUG: soft lockup - CPU#12 stuck for 23s! [expect:117032]
[ 4422.996130] Modules linked in: ipv6 loop usb_storage igb ptp sg sr_mod ehci_pci ehci_hcd pps_core n2_rng rng_core
[ 4423.016617] CPU: 12 PID: 117032 Comm: expect Not tainted 3.17.0-rc4+ #1608
[ 4423.030331] task:
fff8003cc730e220 ti:
fff8003d99d54000 task.ti:
fff8003d99d54000
[ 4423.045282] TSTATE:
0000000011001602 TPC:
00000000004521e8 TNPC:
00000000004521ec Y:
00000000 Not tainted
[ 4423.064905] TPC: <__flush_tlb_kernel_range+0x28/0x40>
[ 4423.074964] g0:
000000000052fd10 g1:
00000001295a8000 g2:
ffffff7176ffc000 g3:
0000000000002000
[ 4423.092324] g4:
fff8003cc730e220 g5:
fff8003dfedcc000 g6:
fff8003d99d54000 g7:
0000000000000006
[ 4423.109687] o0:
0000000000000000 o1:
0000000000000000 o2:
0000000000000003 o3:
00000000f0000000
[ 4423.127058] o4:
0000000000000080 o5:
00000001295a8000 sp:
fff8003d99d56d01 ret_pc:
000000000052ff54
[ 4423.145121] RPC: <__purge_vmap_area_lazy+0x314/0x3a0>
[ 4423.155185] l0:
0000000000000000 l1:
0000000000000000 l2:
0000000000a38040 l3:
0000000000000000
[ 4423.172559] l4:
fff8003dae8965e0 l5:
ffffffffffffffff l6:
0000000000000000 l7:
00000000f7e2b138
[ 4423.189913] i0:
fff8003d99d576a0 i1:
fff8003d99d576a8 i2:
fff8003d99d575e8 i3:
0000000000000000
[ 4423.207284] i4:
0000000000008008 i5:
fff8003d99d575c8 i6:
fff8003d99d56df1 i7:
0000000000530c24
[ 4423.224640] I7: <free_vmap_area_noflush+0x64/0x80>
[ 4423.234193] Call Trace:
[ 4423.239051] [
0000000000530c24] free_vmap_area_noflush+0x64/0x80
[ 4423.251029] [
0000000000531a7c] remove_vm_area+0x5c/0x80
[ 4423.261628] [
0000000000531b80] __vunmap+0x20/0x120
[ 4423.271352] [
000000000071cf18] n_tty_close+0x18/0x40
[ 4423.281423] [
00000000007222b0] tty_ldisc_close+0x30/0x60
[ 4423.292183] [
00000000007225a4] tty_ldisc_reinit+0x24/0xa0
[ 4423.303120] [
0000000000722ab4] tty_ldisc_hangup+0xd4/0x1e0
[ 4423.314232] [
0000000000719aa0] __tty_hangup+0x280/0x3c0
[ 4423.324835] [
0000000000724cb4] pty_close+0x134/0x1a0
[ 4423.334905] [
000000000071aa24] tty_release+0x104/0x500
[ 4423.345316] [
00000000005511d0] __fput+0x90/0x1e0
[ 4423.354701] [
000000000047fa54] task_work_run+0x94/0xe0
[ 4423.365126] [
0000000000404b44] __handle_signal+0xc/0x2c
Fixes:
4ca9a23765da ("sparc64: Guard against flushing openfirmware mappings.")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andreas Larsson [Fri, 29 Aug 2014 15:08:21 +0000 (17:08 +0200)]
sparc: Let memset return the address argument
[ Upstream commit
74cad25c076a2f5253312c2fe82d1a4daecc1323 ]
This makes memset follow the standard (instead of returning 0 on success). This
is needed when certain versions of gcc optimizes around memset calls and assume
that the address argument is preserved in %o0.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sowmini Varadhan [Tue, 16 Sep 2014 15:37:08 +0000 (11:37 -0400)]
sparc64: Move request_irq() from ldc_bind() to ldc_alloc()
[ Upstream commit
c21c4ab0d6921f7160a43216fa6973b5924de561 ]
The request_irq() needs to be done from ldc_alloc()
to avoid the following (caught by lockdep)
[
00000000004a0738] __might_sleep+0xf8/0x120
[
000000000058bea4] kmem_cache_alloc_trace+0x184/0x2c0
[
00000000004faf80] request_threaded_irq+0x80/0x160
[
000000000044f71c] ldc_bind+0x7c/0x220
[
0000000000452454] vio_port_up+0x54/0xe0
[
00000000101f6778] probe_disk+0x38/0x220 [sunvdc]
[
00000000101f6b8c] vdc_port_probe+0x22c/0x300 [sunvdc]
[
0000000000451a88] vio_device_probe+0x48/0x60
[
000000000074c56c] really_probe+0x6c/0x300
[
000000000074c83c] driver_probe_device+0x3c/0xa0
[
000000000074c92c] __driver_attach+0x8c/0xa0
[
000000000074a6ec] bus_for_each_dev+0x6c/0xa0
[
000000000074c1dc] driver_attach+0x1c/0x40
[
000000000074b0fc] bus_add_driver+0xbc/0x280
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
bob picco [Tue, 16 Sep 2014 13:28:15 +0000 (09:28 -0400)]
sparc64: find_node adjustment
[ Upstream commit
3dee9df54836d5f844f3d58281d3f3e6331b467f ]
We have seen an issue with guest boot into LDOM that causes early boot failures
because of no matching rules for node identitity of the memory. I analyzed this
on my T4 and concluded there might not be a solution. I saw the issue in
mainline too when booting into the control/primary domain - with guests
configured. Note, this could be a firmware bug on some older machines.
I'll provide a full explanation of the issues below. Should we not find a
matching BEST latency group for a real address (RA) then we will assume node 0.
On the T4-2 here with the information provided I can't see an alternative.
Technically the LDOM shown below should match the MBLOCK to the
favorable latency group. However other factors must be considered too. Were
the memory controllers configured "fine" grained interleave or "coarse"
grain interleaved - T4. Also should a "group" MD node be considered a NUMA
node?
There has to be at least one Machine Description (MD) "group" and hence one
NUMA node. The group can have one or more latency groups (lg) - more than one
memory controller. The current code chooses the smallest latency as the most
favorable per group. The latency and lg information is in MLGROUP below.
MBLOCK is the base and size of the RAs for the machine as fetched from OBP
/memory "available" property. My machine has one MBLOCK but more would be
possible - with holes?
For a T4-2 the following information has been gathered:
with LDOM guest
MEMBLOCK configuration:
memory size = 0x27f870000
memory.cnt = 0x3
memory[0x0] [0x00000020400000-0x0000029fc67fff], 0x27f868000 bytes
memory[0x1] [0x0000029fd8a000-0x0000029fd8bfff], 0x2000 bytes
memory[0x2] [0x0000029fd92000-0x0000029fd97fff], 0x6000 bytes
reserved.cnt = 0x2
reserved[0x0] [0x00000020800000-0x000000216c15c0], 0xec15c1 bytes
reserved[0x1] [0x00000024800000-0x0000002c180c1e], 0x7980c1f bytes
MBLOCK[0]: base[
20000000] size[
280000000] offset[0]
(note: "base" and "size" reported in "MBLOCK" encompass the "memory[X]" values)
(note: (RA + offset) & mask = val is the formula to detect a match for the
memory controller. should there be no match for find_node node, a return
value of -1 resulted for the node - BAD)
There is one group. It has these forward links
MLGROUP[1]: node[545] latency[1f7e8] match[
200000000] mask[
200000000]
MLGROUP[2]: node[54d] latency[2de60] match[0] mask[
200000000]
NUMA NODE[0]: node[545] mask[
200000000] val[
200000000] (latency[1f7e8])
(note: "val" is the best lg's (smallest latency) "match")
no LDOM guest - bare metal
MEMBLOCK configuration:
memory size = 0xfdf2d0000
memory.cnt = 0x3
memory[0x0] [0x00000020400000-0x00000fff6adfff], 0xfdf2ae000 bytes
memory[0x1] [0x00000fff6d2000-0x00000fff6e7fff], 0x16000 bytes
memory[0x2] [0x00000fff766000-0x00000fff771fff], 0xc000 bytes
reserved.cnt = 0x2
reserved[0x0] [0x00000020800000-0x00000021a04580], 0x1204581 bytes
reserved[0x1] [0x00000024800000-0x0000002c7d29fc], 0x7fd29fd bytes
MBLOCK[0]: base[
20000000] size[
fe0000000] offset[0]
there are two groups
group node[16d5]
MLGROUP[0]: node[1765] latency[1f7e8] match[0] mask[
200000000]
MLGROUP[3]: node[177d] latency[2de60] match[
200000000] mask[
200000000]
NUMA NODE[0]: node[1765] mask[
200000000] val[0] (latency[1f7e8])
group node[171d]
MLGROUP[2]: node[1775] latency[2de60] match[0] mask[
200000000]
MLGROUP[1]: node[176d] latency[1f7e8] match[
200000000] mask[
200000000]
NUMA NODE[1]: node[176d] mask[
200000000] val[
200000000] (latency[1f7e8])
(note: for this two "group" bare metal machine, 1/2 memory is in group one's
lg and 1/2 memory is in group two's lg).
Cc: sparclinux@vger.kernel.org
Signed-off-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Sun, 19 Oct 2014 03:03:09 +0000 (23:03 -0400)]
sparc64: Fix corrupted thread fault code.
[ Upstream commit
84bd6d8b9c0f06b3f188efb479c77e20f05e9a8a ]
Every path that ends up at do_sparc64_fault() must install a valid
FAULT_CODE_* bitmask in the per-thread fault code byte.
Two paths leading to the label winfix_trampoline (which expects the
FAULT_CODE_* mask in register %g4) were not doing so:
1) For pre-hypervisor TLB protection violation traps, if we took
the 'winfix_trampoline' path we wouldn't have %g4 initialized
with the FAULT_CODE_* value yet. Resulting in using the
TLB_TAG_ACCESS register address value instead.
2) In the TSB miss path, when we notice that we are going to use a
hugepage mapping, but we haven't allocated the hugepage TSB yet, we
still have to take the window fixup case into consideration and
in that particular path we leave %g4 not setup properly.
Errors on this sort were largely invisible previously, but after
commit
4ccb9272892c33ef1c19a783cfa87103b30c2784 ("sparc64: sun4v TLB
error power off events") we now have a fault_code mask bit
(FAULT_CODE_BAD_RA) that triggers due to this bug.
FAULT_CODE_BAD_RA triggers because this bit is set in TLB_TAG_ACCESS
(see #1 above) and thus we get seemingly random bus errors triggered
for user processes.
Fixes:
4ccb9272892c ("sparc64: sun4v TLB error power off events")
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
bob picco [Tue, 16 Sep 2014 13:26:47 +0000 (09:26 -0400)]
sparc64: sun4v TLB error power off events
[ Upstream commit
4ccb9272892c33ef1c19a783cfa87103b30c2784 ]
We've witnessed a few TLB events causing the machine to power off because
of prom_halt. In one case it was some nfs related area during rmmod. Another
was an mmapper of /dev/mem. A more recent one is an ITLB issue with
a bad pagesize which could be a hardware bug. Bugs happen but we should
attempt to not power off the machine and/or hang it when possible.
This is a DTLB error from an mmapper of /dev/mem:
[root@sparcie ~]# SUN4V-DTLB: Error at TPC[
fffff80100903e6c], tl 1
SUN4V-DTLB: TPC<0xfffff80100903e6c>
SUN4V-DTLB: O7[
fffff801081979d0]
SUN4V-DTLB: O7<0xfffff801081979d0>
SUN4V-DTLB: vaddr[
fffff80100000000] ctx[1250] pte[
98000000000f0610] error[2]
.
This is recent mainline for ITLB:
[ 3708.179864] SUN4V-ITLB: TPC<0xfffffc010071cefc>
[ 3708.188866] SUN4V-ITLB: O7[
fffffc010071cee8]
[ 3708.197377] SUN4V-ITLB: O7<0xfffffc010071cee8>
[ 3708.206539] SUN4V-ITLB: vaddr[e0003] ctx[1a3c] pte[
2900000dcc800eeb] error[4]
.
Normally sun4v_itlb_error_report() and sun4v_dtlb_error_report() would call
prom_halt() and drop us to OF command prompt "ok". This isn't the case for
LDOMs and the machine powers off.
For the HV reported error of HV_ENORADDR for HV HV_MMU_MAP_ADDR_TRAP we cause
a SIGBUS error by qualifying it within do_sparc64_fault() for fault code mask
of FAULT_CODE_BAD_RA. This is done when trap level (%tl) is less or equal
one("1"). Otherwise, for %tl > 1, we proceed eventually to die_if_kernel().
The logic of this patch was partially inspired by David Miller's feedback.
Power off of large sparc64 machines is painful. Plus die_if_kernel provides
more context. A reset sequence isn't a brief period on large sparc64 but
better than power-off/power-on sequence.
Cc: sparclinux@vger.kernel.org
Signed-off-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Hellstrom [Wed, 10 Sep 2014 12:17:52 +0000 (14:17 +0200)]
sparc32: dma_alloc_coherent must honour gfp flags
[ Upstream commit
d1105287aabe88dbb3af825140badaa05cf0442c ]
dma_zalloc_coherent() calls dma_alloc_coherent(__GFP_ZERO)
but the sparc32 implementations sbus_alloc_coherent() and
pci32_alloc_coherent() doesn't take the gfp flags into
account.
Tested on the SPARC32/LEON GRETH Ethernet driver which fails
due to dma_alloc_coherent(__GFP_ZERO) returns non zeroed
pages.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Mon, 11 Aug 2014 22:38:46 +0000 (15:38 -0700)]
sparc64: Fix pcr_ops initialization and usage bugs.
[ Upstream commit
8bccf5b313180faefce38e0d1140f76e0f327d28 ]
Christopher reports that perf_event_print_debug() can crash in uniprocessor
builds. The crash is due to pcr_ops being NULL.
This happens because pcr_arch_init() is only invoked by smp_cpus_done() which
only executes in SMP builds.
init_hw_perf_events() is closely intertwined with pcr_ops being setup properly,
therefore:
1) Call pcr_arch_init() early on from init_hw_perf_events(), instead of
from smp_cpus_done().
2) Do not hook up a PMU type if pcr_ops is NULL after pcr_arch_init().
3) Move init_hw_perf_events to a later initcall so that it we will be
sure to invoke pcr_arch_init() after all cpus are brought up.
Finally, guard the one naked sequence of pcr_ops dereferences in
__global_pmu_self() with an appropriate NULL check.
Reported-by: Christopher Alexander Tobias Schulze <cat.schulze@alice-dsl.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Tue, 12 Aug 2014 03:45:01 +0000 (20:45 -0700)]
sparc64: Do not disable interrupts in nmi_cpu_busy()
[ Upstream commit
58556104e9cd0107a7a8d2692cf04ef31669f6e4 ]
nmi_cpu_busy() is a SMP function call that just makes sure that all of the
cpus are spinning using cpu cycles while the NMI test runs.
It does not need to disable IRQs because we just care about NMIs executing
which will even with 'normal' IRQs disabled.
It is not legal to enable hard IRQs in a SMP cross call, in fact this bug
triggers the BUG check in irq_work_run_list():
BUG_ON(!irqs_disabled());
Because now irq_work_run() is invoked from the tail of
generic_smp_call_function_single_interrupt().
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dave Chinner [Tue, 23 Sep 2014 05:36:27 +0000 (15:36 +1000)]
xfs: ensure WB_SYNC_ALL writeback handles partial pages correctly
commit
0d085a529b427d97710e6a41f8a4f23e1757cd12 upstream.
XFS has been having trouble with stray delayed allocation extents
beyond EOF for a long time. Recent changes to the collapse range
code has triggered erroneous EBUSY errors on page invalidtion for
block size smaller than page size filesystems. These
have been caused by dirty buffers beyond EOF on a partial page which
do not get written to disk during a sync.
The issue is that write-ahead in xfs_cluster_write() finds such a
partial page and handles it by leaving the page dirty but pushing it
into a writeback state. This used to work just fine, as the
write_cache_pages() code would then find the dirty partial page in
the next mapping tree lookup as the dirty tag is still set.
Unfortunately, when we moved to a mark and sweep approach to
writeback to fix other writeback sync issues, we broken this. THe
act of marking the page as under writeback now clears the TOWRITE
tag in the radix tree, even though the page is still dirty. This
causes the TOWRITE tag to be cleared, and hence the next lookup on
the mapping tree does not find the dirty partial page and so doesn't
try to write it again.
This same writeback bug was found recently in ext4 and fixed in
commit 1c8349a ("ext4: fix data integrity sync in ordered mode")
without communication to the wider filesystem community. We can use
exactly the same fix here so the TOWRITE flag is not cleared on
partial page writes.
cc: stable@vger.kernel.org # dependent on
1c8349a17137b93f0a83f276c764a6df1b9a116e
Root-cause-found-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chao Yu [Thu, 24 Jul 2014 09:25:42 +0000 (17:25 +0800)]
ecryptfs: avoid to access NULL pointer when write metadata in xattr
commit
35425ea2492175fd39f6116481fe98b2b3ddd4ca upstream.
Christopher Head 2014-06-28 05:26:20 UTC described:
"I tried to reproduce this on 3.12.21. Instead, when I do "echo hello > foo"
in an ecryptfs mount with ecryptfs_xattr specified, I get a kernel crash:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<
ffffffff8110eb39>] fsstack_copy_attr_all+0x2/0x61
PGD
d7840067 PUD
b2c3c067 PMD 0
Oops: 0002 [#1] SMP
Modules linked in: nvidia(PO)
CPU: 3 PID: 3566 Comm: bash Tainted: P O 3.12.21-gentoo-r1 #2
Hardware name: ASUSTek Computer Inc. G60JX/G60JX, BIOS 206 03/15/2010
task:
ffff8801948944c0 ti:
ffff8800bad70000 task.ti:
ffff8800bad70000
RIP: 0010:[<
ffffffff8110eb39>] [<
ffffffff8110eb39>] fsstack_copy_attr_all+0x2/0x61
RSP: 0018:
ffff8800bad71c10 EFLAGS:
00010246
RAX:
00000000000181a4 RBX:
ffff880198648480 RCX:
0000000000000000
RDX:
0000000000000004 RSI:
ffff880172010450 RDI:
0000000000000000
RBP:
ffff880198490e40 R08:
0000000000000000 R09:
0000000000000000
R10:
ffff880172010450 R11:
ffffea0002c51e80 R12:
0000000000002000
R13:
000000000000001a R14:
0000000000000000 R15:
ffff880198490e40
FS:
00007ff224caa700(0000) GS:
ffff88019fcc0000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
0000000000000000 CR3:
00000000bb07f000 CR4:
00000000000007e0
Stack:
ffffffff811826e8 ffff8800a39d8000 0000000000000000 000000000000001a
ffff8800a01d0000 ffff8800a39d8000 ffffffff81185fd5 ffffffff81082c2c
00000001a39d8000 53d0abbc98490e40 0000000000000037 ffff8800a39d8220
Call Trace:
[<
ffffffff811826e8>] ? ecryptfs_setxattr+0x40/0x52
[<
ffffffff81185fd5>] ? ecryptfs_write_metadata+0x1b3/0x223
[<
ffffffff81082c2c>] ? should_resched+0x5/0x23
[<
ffffffff8118322b>] ? ecryptfs_initialize_file+0xaf/0xd4
[<
ffffffff81183344>] ? ecryptfs_create+0xf4/0x142
[<
ffffffff810f8c0d>] ? vfs_create+0x48/0x71
[<
ffffffff810f9c86>] ? do_last.isra.68+0x559/0x952
[<
ffffffff810f7ce7>] ? link_path_walk+0xbd/0x458
[<
ffffffff810fa2a3>] ? path_openat+0x224/0x472
[<
ffffffff810fa7bd>] ? do_filp_open+0x2b/0x6f
[<
ffffffff81103606>] ? __alloc_fd+0xd6/0xe7
[<
ffffffff810ee6ab>] ? do_sys_open+0x65/0xe9
[<
ffffffff8157d022>] ? system_call_fastpath+0x16/0x1b
RIP [<
ffffffff8110eb39>] fsstack_copy_attr_all+0x2/0x61
RSP <
ffff8800bad71c10>
CR2:
0000000000000000
---[ end trace
df9dba5f1ddb8565 ]---"
If we create a file when we mount with ecryptfs_xattr_metadata option, we will
encounter a crash in this path:
->ecryptfs_create
->ecryptfs_initialize_file
->ecryptfs_write_metadata
->ecryptfs_write_metadata_to_xattr
->ecryptfs_setxattr
->fsstack_copy_attr_all
It's because our dentry->d_inode used in fsstack_copy_attr_all is NULL, and it
will be initialized when ecryptfs_initialize_file finish.
So we should skip copying attr from lower inode when the value of ->d_inode is
invalid.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
klightspeed@killerwolves.net [Wed, 10 Sep 2014 08:55:41 +0000 (18:55 +1000)]
ARM: mvebu: Netgear RN102: Use Hardware BCH ECC
commit
ace8578182dc347b043c0825b9873f62fdaa5b77 upstream.
The bootloader on the Netgear ReadyNAS RN102 uses Hardware BCH ECC
(strength = 4), while the pxa3xx NAND driver by default uses
Hamming ECC (strength = 1).
This patch changes the ECC mode on these machines to match that
of the bootloader and of the stock firmware. That way, it is
now possible to update the kernel from userland (e.g. using
standard tools from mtd-utils package); u-boot will happily
load and boot it.
Fixes:
92beaccd8b49 ("ARM: mvebu: Enable NAND controller in ReadyNAS 102 .dts file")
Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Arnaud Ebalard <arno@natisbad.org>
Link: https://lkml.kernel.org/r/1410339341-3372-1-git-send-email-klightspeed@killerwolves.net
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arnaud Ebalard [Sat, 6 Sep 2014 20:49:38 +0000 (22:49 +0200)]
ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC
commit
500abb6ccb9e3f8d638a7f422443a8549245ef90 upstream.
The bootloader on the Netgear ReadyNAS RN2120 uses Hardware BCH
ECC (strength = 4), while the pxa3xx NAND driver by default uses
Hamming ECC (strength = 1).
This patch changes the ECC mode on these machines to match that
of the bootloader and of the stock firmware. That way, it is
now possible to update the kernel from userland (e.g. using
standard tools from mtd-utils package); u-boot will happily
load and boot it.
The issue was initially reported and fixed by Ben Pedell for
RN102. The RN2120 shares the same Hynix H27U1G8F2BTR NAND
flash and setup. This patch is based on Ben's fix for RN102.
Fixes:
ad51eddd95ad ("ARM: mvebu: Enable NAND controller in ReadyNAS 2120 .dts file")
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Link: https://lkml.kernel.org/r/61f6a1b7ad0adc57a0e201b9680bc2e5f214a317.1410035142.git.arno@natisbad.org
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arnaud Ebalard [Sat, 6 Sep 2014 20:49:25 +0000 (22:49 +0200)]
ARM: mvebu: Netgear RN104: Use Hardware BCH ECC
commit
225b94cdf719d0bc522a354bdafc18e5da5ff83b upstream.
The bootloader on the Netgear ReadyNAS RN104 uses Hardware BCH
ECC (strength = 4), while the pxa3xx NAND driver by default uses
Hamming ECC (strength = 1).
This patch changes the ECC mode on these machines to match that
of the bootloader and of the stock firmware. That way, it is
now possible to update the kernel from userland (e.g. using
standard tools from mtd-utils package); u-boot will happily
load and boot it.
The issue was initially reported and fixed by Ben Pedell for
RN102. The RN104 shares the same Hynix H27U1G8F2BTR NAND
flash and setup. This patch is based on Ben's fix for RN102.
Fixes:
0373a558bd79 ("ARM: mvebu: Enable NAND controller in ReadyNAS 104 .dts file")
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Link: https://lkml.kernel.org/r/920c7e7169dc6aaaa3eb4bced2336d38e77b8864.1410035142.git.arno@natisbad.org
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ludovic Desroches [Mon, 22 Sep 2014 13:51:33 +0000 (15:51 +0200)]
ARM: at91/PMC: don't forget to write PMC_PCDR register to disable clocks
commit
cfa1950e6c6b72251e80adc736af3c3d2907ab0e upstream.
When introducing support for sama5d3, the write to PMC_PCDR register has
been accidentally removed.
Reported-by: Nathalie Cyrille <nathalie.cyrille@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andreas Henriksson [Tue, 23 Sep 2014 15:12:52 +0000 (17:12 +0200)]
ARM: at91: fix at91sam9263ek DT mmc pinmuxing settings
commit
b65e0fb3d046cc65d0a3c45d43de351fb363271b upstream.
As discovered on a custom board similar to at91sam9263ek and basing
its devicetree on that one apparently the pin muxing doesn't get
set up properly. This was discovered since the custom boards u-boot
does funky stuff with the pin muxing and leaved it set to SPI
which made the MMC driver not work under Linux.
The fix is simply to define the given configuration as the default.
This probably worked by pure luck before, but it's better to
make the muxing explicitly set.
Signed-off-by: Andreas Henriksson <andreas.henriksson@endian.se>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Dueck [Wed, 17 Sep 2014 08:33:32 +0000 (10:33 +0200)]
ARM: at91/dt: Fix typo regarding can0_clk
commit
0a51d644c20f5c88fd3a659119d1903f74927082 upstream.
Otherwise the clock for can0 will never get enabled.
Signed-off-by: David Dueck <davidcdueck@googlemail.com>
Signed-off-by: Anthony Harivel <anthony.harivel@emtrion.de>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anssi Hannula [Sun, 19 Oct 2014 16:25:19 +0000 (19:25 +0300)]
ALSA: hda - hdmi: Fix missing ELD change event on plug/unplug
commit
6acce400d9daf1353fbf497302670c90a3205e1d upstream.
The ELD ALSA control change event is sent by hdmi_present_sense() when
eld_changed is true.
Currently, it is only true when the ELD buffer contents have been
modified. However, the user-visible ELD controls also change to a
zero-length value and back when eld_valid is unset/set, and no event is
currently sent in such cases (such as when unplugging or replugging a
sink).
Fix the code to always set eld_changed if eld_valid value is changed,
and therefore to always send the change event when the user-visible
value changes.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Cc: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlad Catoi [Sat, 18 Oct 2014 22:45:41 +0000 (17:45 -0500)]
ALSA: usb-audio: Add support for Steinberg UR22 USB interface
commit
f0b127fbfdc8756eba7437ab668f3169280bd358 upstream.
Adding support for Steinberg UR22 USB interface via quirks table patch
See Ubuntu bug report:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1317244
Also see threads:
http://linux-audio.4202.n7.nabble.com/Support-for-Steinberg-UR22-Yamaha-USB-chipset-0499-1509-tc82888.html#a82917
http://www.steinberg.net/forums/viewtopic.php?t=62290
Tested by at least 4 people judging by the threads.
Did not test MIDI interface, but audio output and capture both are
functional. Built 3.17 kernel with this driver on Ubuntu 14.04 & tested with mpg123
Patch applied to 3.13 Ubuntu kernel works well enough for daily use.
Signed-off-by: Vlad Catoi <vladcatoi@gmail.com>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Harsha Priya [Thu, 9 Oct 2014 11:04:56 +0000 (11:04 +0000)]
ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume
commit
b450b17c156e264bc44a198046d3ebaaef5a041d upstream.
This patch sets the headphones mode to default before suspending
which helps avoid the pop noise on headphones
Signed-off-by: Harsha Priya <harshapriya.n@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Mon, 13 Oct 2014 21:18:02 +0000 (23:18 +0200)]
ALSA: emu10k1: Fix deadlock in synth voice lookup
commit
95926035b187cc9fee6fb61385b7da9c28123f74 upstream.
The emu10k1 voice allocator takes voice_lock spinlock. When there is
no empty stream available, it tries to release a voice used by synth,
and calls get_synth_voice. The callback function,
snd_emu10k1_synth_get_voice(), however, also takes the voice_lock,
thus it deadlocks.
The fix is simply removing the voice_lock holds in
snd_emu10k1_synth_get_voice(), as this is always called in the
spinlock context.
Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anatol Pomozov [Fri, 17 Oct 2014 19:43:34 +0000 (12:43 -0700)]
ALSA: pcm: use the same dma mmap codepath both for arm and arm64
commit
a011e213f3700233ed2a676f1ef0a74a052d7162 upstream.
This avoids following kernel crash when try to playback on arm64
[ 107.497203] [<
ffffffc00046b310>] snd_pcm_mmap_data_fault+0x90/0xd4
[ 107.503405] [<
ffffffc0001541ac>] __do_fault+0xb0/0x498
[ 107.508565] [<
ffffffc0001576a0>] handle_mm_fault+0x224/0x7b0
[ 107.514246] [<
ffffffc000092640>] do_page_fault+0x11c/0x310
[ 107.519738] [<
ffffffc000081100>] do_mem_abort+0x38/0x98
Tested: backported to 3.14 and tried to playback on arm64 machine
Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Victor Kamensky [Tue, 14 Oct 2014 05:55:05 +0000 (06:55 +0100)]
arm64: compat: fix compat types affecting struct compat_elf_prpsinfo
commit
971a5b6fe634bb7b617d8c5f25b6a3ddbc600194 upstream.
The compat_elf_prpsinfo structure does not match the arch/arm struct
elf_pspsinfo definition. As result NT_PRPSINFO note in core file
created by arm64 kernel for aarch32 (compat) process has wrong size.
So gdb cannot display command that caused process crash.
Fix is to change size of __compat_uid_t, __compat_gid_t so it would
match size of similar fields in arch/arm case.
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Thu, 18 Sep 2014 17:08:53 +0000 (20:08 +0300)]
spi: dw-mid: terminate ongoing transfers at exit
commit
8e45ef682cb31fda62ed4eeede5d9745a0a1b1e2 upstream.
Do full clean up at exit, means terminate all ongoing DMA transfers.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Kasatkin [Fri, 27 Jun 2014 15:04:27 +0000 (18:04 +0300)]
ima: provide flag to identify new empty files
commit
b151d6b00bbb798c58f2f21305e7d43fa763f34f upstream.
On ima_file_free(), newly created empty files are not labeled with
an initial security.ima value, because the iversion did not change.
Commit dff6efc "fs: fix iversion handling" introduced a change in
iversion behavior. To verify this change use the shell command:
$ (exec >foo)
$ getfattr -h -e hex -d -m security foo
This patch defines the IMA_NEW_FILE flag. The flag is initially
set, when IMA detects that a new file is created, and subsequently
checked on the ima_file_free() hook to set the initial security.ima
value.
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexey Kardashevskiy [Thu, 25 Sep 2014 06:39:18 +0000 (16:39 +1000)]
powerpc/iommu/ddw: Fix endianness
commit
9410e0185e65394c0c6d046033904b53b97a9423 upstream.
rtas_call() accepts and returns values in CPU endianness.
The ddw_query_response and ddw_create_response structs members are
defined and treated as BE but as they are passed to rtas_call() as
(u32 *) and they get byteswapped automatically, the data is CPU-endian.
This fixes ddw_query_response and ddw_create_response definitions and use.
of_read_number() is designed to work with device tree cells - it assumes
the input is big-endian and returns data in CPU-endian. However due
to the ddw_create_response struct fix, create.addr_hi/lo are already
CPU-endian so do not byteswap them.
ddw_avail is a pointer to the "ibm,ddw-applicable" property which contains
3 cells which are big-endian as it is a device tree. rtas_call() accepts
a RTAS token in CPU-endian. This makes use of of_property_read_u32_array
to byte swap and avoid the need for a number of be32_to_cpu calls.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[aik: folded Anton's patch with of_property_read_u32_array]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Catalin Marinas [Fri, 17 Oct 2014 16:38:49 +0000 (17:38 +0100)]
futex: Ensure get_futex_key_refs() always implies a barrier
commit
76835b0ebf8a7fe85beb03c75121419a7dec52f0 upstream.
Commit
b0c29f79ecea (futexes: Avoid taking the hb->lock if there's
nothing to wake up) changes the futex code to avoid taking a lock when
there are no waiters. This code has been subsequently fixed in commit
11d4616bd07f (futex: revert back to the explicit waiter counting code).
Both the original commit and the fix-up rely on get_futex_key_refs() to
always imply a barrier.
However, for private futexes, none of the cases in the switch statement
of get_futex_key_refs() would be hit and the function completes without
a memory barrier as required before checking the "waiters" in
futex_wake() -> hb_waiters_pending(). The consequence is a race with a
thread waiting on a futex on another CPU, allowing the waker thread to
read "waiters == 0" while the waiter thread to have read "futex_val ==
locked" (in kernel).
Without this fix, the problem (user space deadlocks) can be seen with
Android bionic's mutex implementation on an arm64 multi-cluster system.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Matteo Franchin <Matteo.Franchin@arm.com>
Fixes:
b0c29f79ecea (futexes: Avoid taking the hb->lock if there's nothing to wake up)
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sasha Levin [Mon, 13 Oct 2014 22:51:05 +0000 (15:51 -0700)]
kernel: add support for gcc 5
commit
71458cfc782eafe4b27656e078d379a34e472adf upstream.
We're missing include/linux/compiler-gcc5.h which is required now
because gcc branched off to v5 in trunk.
Just copy the relevant bits out of include/linux/compiler-gcc4.h,
no new code is added as of now.
This fixes a build error when using gcc 5.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yann Droneaud [Thu, 9 Oct 2014 22:24:40 +0000 (15:24 -0700)]
fanotify: enable close-on-exec on events' fd when requested in fanotify_init()
commit
0b37e097a648aa71d4db1ad108001e95b69a2da4 upstream.
According to commit
80af258867648 ("fanotify: groups can specify their
f_flags for new fd"), file descriptors created as part of file access
notification events inherit flags from the event_f_flags argument passed
to syscall fanotify_init(2)[1].
Unfortunately O_CLOEXEC is currently silently ignored.
Indeed, event_f_flags are only given to dentry_open(), which only seems to
care about O_ACCMODE and O_PATH in do_dentry_open(), O_DIRECT in
open_check_o_direct() and O_LARGEFILE in generic_file_open().
It's a pity, since, according to some lookup on various search engines and
http://codesearch.debian.net/, there's already some userspace code which
use O_CLOEXEC:
- in systemd's readahead[2]:
fanotify_fd = fanotify_init(FAN_CLOEXEC|FAN_NONBLOCK, O_RDONLY|O_LARGEFILE|O_CLOEXEC|O_NOATIME);
- in clsync[3]:
#define FANOTIFY_EVFLAGS (O_LARGEFILE|O_RDONLY|O_CLOEXEC)
int fanotify_d = fanotify_init(FANOTIFY_FLAGS, FANOTIFY_EVFLAGS);
- in examples [4] from "Filesystem monitoring in the Linux
kernel" article[5] by Aleksander Morgado:
if ((fanotify_fd = fanotify_init (FAN_CLOEXEC,
O_RDONLY | O_CLOEXEC | O_LARGEFILE)) < 0)
Additionally, since commit
48149e9d3a7e ("fanotify: check file flags
passed in fanotify_init"). having O_CLOEXEC as part of fanotify_init()
second argument is expressly allowed.
So it seems expected to set close-on-exec flag on the file descriptors if
userspace is allowed to request it with O_CLOEXEC.
But Andrew Morton raised[6] the concern that enabling now close-on-exec
might break existing applications which ask for O_CLOEXEC but expect the
file descriptor to be inherited across exec().
In the other hand, as reported by Mihai Dontu[7] close-on-exec on the file
descriptor returned as part of file access notify can break applications
due to deadlock. So close-on-exec is needed for most applications.
More, applications asking for close-on-exec are likely expecting it to be
enabled, relying on O_CLOEXEC being effective. If not, it might weaken
their security, as noted by Jan Kara[8].
So this patch replaces call to macro get_unused_fd() by a call to function
get_unused_fd_flags() with event_f_flags value as argument. This way
O_CLOEXEC flag in the second argument of fanotify_init(2) syscall is
interpreted and close-on-exec get enabled when requested.
[1] http://man7.org/linux/man-pages/man2/fanotify_init.2.html
[2] http://cgit.freedesktop.org/systemd/systemd/tree/src/readahead/readahead-collect.c?id=v208#n294
[3] https://github.com/xaionaro/clsync/blob/v0.2.1/sync.c#L1631
https://github.com/xaionaro/clsync/blob/v0.2.1/configuration.h#L38
[4] http://www.lanedo.com/~aleksander/fanotify/fanotify-example.c
[5] http://www.lanedo.com/2013/filesystem-monitoring-linux-kernel/
[6] http://lkml.kernel.org/r/
20141001153621.
65e9258e65a6167bf2e4cb50@linux-foundation.org
[7] http://lkml.kernel.org/r/
20141002095046.
3715eb69@mdontu-l
[8] http://lkml.kernel.org/r/
20141002104410.GB19748@quack.suse.cz
Link: http://lkml.kernel.org/r/cover.1411562410.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Mihai Don\u021bu <mihai.dontu@gmail.com>
Cc: Pádraig Brady <P@draigBrady.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Jan Kara <jack@suse.cz>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Michael Kerrisk-manpages <mtk.manpages@gmail.com>
Cc: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: Richard Guy Briggs <rgb@redhat.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Junxiao Bi [Thu, 9 Oct 2014 22:28:23 +0000 (15:28 -0700)]
mm: clear __GFP_FS when PF_MEMALLOC_NOIO is set
commit
934f3072c17cc8886f4c043b47eeeb1b12f8de33 upstream.
commit
21caf2fc1931 ("mm: teach mm by current context info to not do I/O
during memory allocation") introduces PF_MEMALLOC_NOIO flag to avoid doing
I/O inside memory allocation, __GFP_IO is cleared when this flag is set,
but __GFP_FS implies __GFP_IO, it should also be cleared. Or it may still
run into I/O, like in superblock shrinker. And this will make the kernel
run into the deadlock case described in that commit.
See Dave Chinner's comment about io in superblock shrinker:
Filesystem shrinkers do indeed perform IO from the superblock shrinker and
have for years. Even clean inodes can require IO before they can be freed
- e.g. on an orphan list, need truncation of post-eof blocks, need to
wait for ordered operations to complete before it can be freed, etc.
IOWs, Ext4, btrfs and XFS all can issue and/or block on arbitrary amounts
of IO in the superblock shrinker context. XFS, in particular, has been
doing transactions and IO from the VFS inode cache shrinker since it was
first introduced....
Fix this by clearing __GFP_FS in memalloc_noio_flags(), this function has
masked all the gfp_mask that will be passed into fs for the processes
setting PF_MEMALLOC_NOIO in the direct reclaim path.
v1 thread at: https://lkml.org/lkml/2014/9/3/32
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: joyce.xue <xuejiufei@huawei.com>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Champion Chen [Sat, 6 Sep 2014 19:06:08 +0000 (14:06 -0500)]
Bluetooth: Fix issue with USB suspend in btusb driver
commit
85560c4a828ec9c8573840c9b66487b6ae584768 upstream.
Suspend could fail for some platforms because
btusb_suspend==> btusb_stop_traffic ==> usb_kill_anchored_urbs.
When btusb_bulk_complete returns before system suspend and resubmits
an URB, the system cannot enter suspend state.
Signed-off-by: Champion Chen <champion_chen@realsil.com.cn>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hedberg [Fri, 15 Aug 2014 18:06:51 +0000 (21:06 +0300)]
Bluetooth: Fix incorrect LE CoC PDU length restriction based on HCI MTU
commit
72c6fb915ff2d30ae14053edee4f0d30019bad76 upstream.
The l2cap_create_le_flowctl_pdu() function that l2cap_segment_le_sdu()
calls is perfectly capable of doing packet fragmentation if given bigger
PDUs than the HCI buffers allow. Forcing the PDU length based on the HCI
MTU (conn->mtu) would therefore needlessly strict operation on hardware
with limited LE buffers (e.g. both Intel and Broadcom seem to have this
set to just 27 bytes).
This patch removes the restriction and makes it possible to send PDUs of
the full length that the remote MPS value allows.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Loic Poulain [Fri, 8 Aug 2014 17:07:16 +0000 (19:07 +0200)]
Bluetooth: Fix HCI H5 corrupted ack value
commit
4807b51895dce8aa650ebebc51fa4a795ed6b8b8 upstream.
In this expression: seq = (seq - 1) % 8
seq (u8) is implicitly converted to an int in the arithmetic operation.
So if seq value is 0, operation is ((0 - 1) % 8) => (-1 % 8) => -1.
The new seq value is 0xff which is an invalid ACK value, we expect 0x07.
It leads to frequent dropped ACK and retransmission.
Fix this by using '&' binary operator instead of '%'.
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stanislaw Gruszka [Wed, 24 Sep 2014 09:24:54 +0000 (11:24 +0200)]
rt2800: correct BBP1_TX_POWER_CTRL mask
commit
01f7feeaf4528bec83798316b3c811701bac5d3e upstream.
Two bits control TX power on BBP_R1 register. Correct the mask,
otherwise we clear additional bit on BBP_R1 register, what can have
unknown, possible negative effect.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Wed, 27 Aug 2014 12:57:57 +0000 (14:57 +0200)]
PCI: Generate uppercase hex for modalias interface class
commit
89ec3dcf17fd3fa009ecf8faaba36828dd6bc416 upstream.
Some implementations of modprobe fail to load the driver for a PCI device
automatically because the "interface" part of the modalias from the kernel
is lowercase, and the modalias from file2alias is uppercase.
The "interface" is the low-order byte of the Class Code, defined in PCI
r3.0, Appendix D. Most interface types defined in the spec do not use
alpha characters, so they won't be affected. For example, 00h, 01h, 10h,
20h, etc. are unaffected.
Print the "interface" byte of the Class Code in uppercase hex, as we
already do for the Vendor ID, Device ID, Class, etc.
[bhelgaas: changelog]
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Douglas Lehr [Wed, 20 Aug 2014 23:26:52 +0000 (09:26 +1000)]
PCI: Increase IBM ipr SAS Crocodile BARs to at least system page size
commit
9fe373f9997b48fcd6222b95baf4a20c134b587a upstream.
The Crocodile chip occasionally comes up with 4k and 8k BAR sizes. Due to
an erratum, setting the SR-IOV page size causes the physical function BARs
to expand to the system page size. Since ppc64 uses 64k pages, when Linux
tries to assign the smaller resource sizes to the now 64k BARs the address
will be truncated and the BARs will overlap.
Force Linux to allocate the resource as a full page, which avoids the
overlap.
[bhelgaas: print expanded resource, too]
Signed-off-by: Douglas Lehr <dllehr@us.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Milton Miller <miltonm@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Petazzoni [Wed, 17 Sep 2014 15:58:27 +0000 (17:58 +0200)]
PCI: mvebu: Fix uninitialized variable in mvebu_get_tgt_attr()
commit
56fab6e189441d714a2bfc8a64f3df9c0749dff7 upstream.
Geert Uytterhoeven reported a warning when building pci-mvebu:
drivers/pci/host/pci-mvebu.c: In function 'mvebu_get_tgt_attr':
drivers/pci/host/pci-mvebu.c:887:39: warning: 'rtype' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (slot == PCI_SLOT(devfn) && type == rtype) {
^
And indeed, the code of mvebu_get_tgt_attr() may lead to the usage of rtype
when being uninitialized, even though it would only happen if we had
entries other than I/O space and 32 bits memory space.
This commit fixes that by simply skipping the current DT range being
considered, if it doesn't match the resource type we're looking for.
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Oren Givon [Wed, 17 Sep 2014 07:31:56 +0000 (10:31 +0300)]
iwlwifi: Add missing PCI IDs for the 7260 series
commit
4f08970f5284dce486f0e2290834aefb2a262189 upstream.
Add 4 missing PCI IDs for the 7260 series.
Signed-off-by: Oren Givon <oren.givon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Adamson [Mon, 29 Sep 2014 16:31:57 +0000 (12:31 -0400)]
NFSv4.1: Fix an NFSv4.1 state renewal regression
commit
d1f456b0b9545f1606a54cd17c20775f159bd2ce upstream.
Commit
2f60ea6b8ced ("NFSv4: The NFSv4.0 client must send RENEW calls if it holds a delegation") set the NFS4_RENEW_TIMEOUT flag in nfs4_renew_state, and does
not put an nfs41_proc_async_sequence call, the NFSv4.1 lease renewal heartbeat
call, on the wire to renew the NFSv4.1 state if the flag was not set.
The NFS4_RENEW_TIMEOUT flag is set when "now" is after the last renewal
(cl_last_renewal) plus the lease time divided by 3. This is arbitrary and
sometimes does the following:
In normal operation, the only way a future state renewal call is put on the
wire is via a call to nfs4_schedule_state_renewal, which schedules a
nfs4_renew_state workqueue task. nfs4_renew_state determines if the
NFS4_RENEW_TIMEOUT should be set, and the calls nfs41_proc_async_sequence,
which only gets sent if the NFS4_RENEW_TIMEOUT flag is set.
Then the nfs41_proc_async_sequence rpc_release function schedules
another state remewal via nfs4_schedule_state_renewal.
Without this change we can get into a state where an application stops
accessing the NFSv4.1 share, state renewal calls stop due to the
NFS4_RENEW_TIMEOUT flag _not_ being set. The only way to recover
from this situation is with a clientid re-establishment, once the application
resumes and the server has timed out the lease and so returns
NFS4ERR_BAD_SESSION on the subsequent SEQUENCE operation.
An example application:
open, lock, write a file.
sleep for 6 * lease (could be less)
ulock, close.
In the above example with NFSv4.1 delegations enabled, without this change,
there are no OP_SEQUENCE state renewal calls during the sleep, and the
clientid is recovered due to lease expiration on the close.
This issue does not occur with NFSv4.1 delegations disabled, nor with
NFSv4.0, with or without delegations enabled.
Signed-off-by: Andy Adamson <andros@netapp.com>
Link: http://lkml.kernel.org/r/1411486536-23401-1-git-send-email-andros@netapp.com
Fixes:
2f60ea6b8ced (NFSv4: The NFSv4.0 client must send RENEW calls...)
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Trond Myklebust [Sat, 27 Sep 2014 21:41:51 +0000 (17:41 -0400)]
NFSv4: fix open/lock state recovery error handling
commit
df817ba35736db2d62b07de6f050a4db53492ad8 upstream.
The current open/lock state recovery unfortunately does not handle errors
such as NFS4ERR_CONN_NOT_BOUND_TO_SESSION correctly. Instead of looping,
just proceeds as if the state manager is finished recovering.
This patch ensures that we loop back, handle higher priority errors
and complete the open/lock state recovery.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Trond Myklebust [Sat, 27 Sep 2014 21:02:26 +0000 (17:02 -0400)]
NFSv4: Fix lock recovery when CREATE_SESSION/SETCLIENTID_CONFIRM fails
commit
a4339b7b686b4acc8b6de2b07d7bacbe3ae44b83 upstream.
If a NFSv4.x server returns NFS4ERR_STALE_CLIENTID in response to a
CREATE_SESSION or SETCLIENTID_CONFIRM in order to tell us that it rebooted
a second time, then the client will currently take this to mean that it must
declare all locks to be stale, and hence ineligible for reboot recovery.
RFC3530 and RFC5661 both suggest that the client should instead rely on the
server to respond to inelegible open share, lock and delegation reclaim
requests with NFS4ERR_NO_GRACE in this situation.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Frans Klaver [Thu, 25 Sep 2014 09:19:51 +0000 (11:19 +0200)]
tty: omap-serial: fix division by zero
commit
dc3187564e61260f49eceb21a4e7eb5e4428e90a upstream.
If the chosen baud rate is large enough (e.g. 3.5 megabaud), the
calculated n values in serial_omap_is_baud_mode16() may become 0. This
causes a division by zero when calculating the difference between
calculated and desired baud rates. To prevent this, cap the n13 and n16
values on 1.
Division by zero in kernel.
[<
c00132e0>] (unwind_backtrace) from [<
c00112ec>] (show_stack+0x10/0x14)
[<
c00112ec>] (show_stack) from [<
c01ed7bc>] (Ldiv0+0x8/0x10)
[<
c01ed7bc>] (Ldiv0) from [<
c023805c>] (serial_omap_baud_is_mode16+0x4c/0x68)
[<
c023805c>] (serial_omap_baud_is_mode16) from [<
c02396b4>] (serial_omap_set_termios+0x90/0x8d8)
[<
c02396b4>] (serial_omap_set_termios) from [<
c0230a0c>] (uart_change_speed+0xa4/0xa8)
[<
c0230a0c>] (uart_change_speed) from [<
c0231798>] (uart_set_termios+0xa0/0x1fc)
[<
c0231798>] (uart_set_termios) from [<
c022bb44>] (tty_set_termios+0x248/0x2c0)
[<
c022bb44>] (tty_set_termios) from [<
c022c17c>] (set_termios+0x248/0x29c)
[<
c022c17c>] (set_termios) from [<
c022c3e4>] (tty_mode_ioctl+0x1c8/0x4e8)
[<
c022c3e4>] (tty_mode_ioctl) from [<
c0227e70>] (tty_ioctl+0xa94/0xb18)
[<
c0227e70>] (tty_ioctl) from [<
c00cf45c>] (do_vfs_ioctl+0x4a0/0x560)
[<
c00cf45c>] (do_vfs_ioctl) from [<
c00cf568>] (SyS_ioctl+0x4c/0x74)
[<
c00cf568>] (SyS_ioctl) from [<
c000e480>] (ret_fast_syscall+0x0/0x30)
Signed-off-by: Frans Klaver <frans.klaver@xsens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willy Tarreau [Sat, 27 Sep 2014 10:31:37 +0000 (12:31 +0200)]
lzo: check for length overrun in variable length encoding.
commit
72cf90124e87d975d0b2114d930808c58b4c05e4 upstream.
This fix ensures that we never meet an integer overflow while adding
255 while parsing a variable length encoding. It works differently from
commit 206a81c ("lzo: properly check for overruns") because instead of
ensuring that we don't overrun the input, which is tricky to guarantee
due to many assumptions in the code, it simply checks that the cumulated
number of 255 read cannot overflow by bounding this number.
The MAX_255_COUNT is the maximum number of times we can add 255 to a base
count without overflowing an integer. The multiply will overflow when
multiplying 255 by more than MAXINT/255. The sum will overflow earlier
depending on the base count. Since the base count is taken from a u8
and a few bits, it is safe to assume that it will always be lower than
or equal to 2*255, thus we can always prevent any overflow by accepting
two less 255 steps.
This patch also reduces the CPU overhead and actually increases performance
by 1.1% compared to the initial code, while the previous fix costs 3.1%
(measured on x86_64).
The fix needs to be backported to all currently supported stable kernels.
Reported-by: Willem Pinckaers <willem@lekkertech.net>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willy Tarreau [Sat, 27 Sep 2014 10:31:36 +0000 (12:31 +0200)]
Revert "lzo: properly check for overruns"
commit
af958a38a60c7ca3d8a39c918c1baa2ff7b6b233 upstream.
This reverts commit 206a81c ("lzo: properly check for overruns").
As analysed by Willem Pinckaers, this fix is still incomplete on
certain rare corner cases, and it is easier to restart from the
original code.
Reported-by: Willem Pinckaers <willem@lekkertech.net>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willy Tarreau [Sat, 27 Sep 2014 10:31:35 +0000 (12:31 +0200)]
Documentation: lzo: document part of the encoding
commit
d98a0526434d27e261f622cf9d2e0028b5ff1a00 upstream.
Add a complete description of the LZO format as processed by the
decompressor. I have not found a public specification of this format
hence this analysis, which will be used to better understand the code.
Cc: Willem Pinckaers <willem@lekkertech.net>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Olga Kornievskaia [Wed, 24 Sep 2014 22:11:28 +0000 (18:11 -0400)]
Fixing lease renewal
commit
8faaa6d5d48b201527e0451296d9e71d23afb362 upstream.
Commit
c9fdeb28 removed a 'continue' after checking if the lease needs
to be renewed. However, if client hasn't moved, the code falls down to
starting reboot recovery erroneously (ie., sends open reclaim and gets
back stale_clientid error) before recovering from getting stale_clientid
on the renew operation.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Fixes:
c9fdeb280b8c (NFS: Add basic migration support to state manager thread)
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Geert Uytterhoeven [Sun, 28 Sep 2014 08:50:06 +0000 (10:50 +0200)]
m68k: Disable/restore interrupts in hwreg_present()/hwreg_write()
commit
e4dc601bf99ccd1c95b7e6eef1d3cf3c4b0d4961 upstream.
hwreg_present() and hwreg_write() temporarily change the VBR register to
another vector table. This table contains a valid bus error handler
only, all other entries point to arbitrary addresses.
If an interrupt comes in while the temporary table is active, the
processor will start executing at such an arbitrary address, and the
kernel will crash.
While most callers run early, before interrupts are enabled, or
explicitly disable interrupts, Finn Thain pointed out that macsonic has
one callsite that doesn't, causing intermittent boot crashes.
There's another unsafe callsite in hilkbd.
Fix this for good by disabling and restoring interrupts inside
hwreg_present() and hwreg_write().
Explicitly disabling interrupts can be removed from the callsites later.
Reported-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Usyskin [Mon, 25 Aug 2014 13:46:53 +0000 (16:46 +0300)]
mei: bus: fix possible boundaries violation
commit
cfda2794b5afe7ce64ee9605c64bef0e56a48125 upstream.
function 'strncpy' will fill whole buffer 'id.name' of fixed size (32)
with string value and will not leave place for NULL-terminator.
Possible buffer boundaries violation in following string operations.
Replace strncpy with strlcpy.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
K. Y. Srinivasan [Wed, 27 Aug 2014 23:25:35 +0000 (16:25 -0700)]
Drivers: hv: vmbus: Fix a bug in vmbus_open()
commit
45d727cee9e200f5b351528b9fb063b69cf702c8 upstream.
Fix a bug in vmbus_open() and properly propagate the error. I would
like to thank Dexuan Cui <decui@microsoft.com> for identifying the
issue.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
K. Y. Srinivasan [Wed, 27 Aug 2014 23:25:34 +0000 (16:25 -0700)]
Drivers: hv: vmbus: Cleanup vmbus_establish_gpadl()
commit
72c6b71c245dac8f371167d97ef471b367d0b66b upstream.
Eliminate the call to BUG_ON() by waiting for the host to respond. We are
trying to reclaim the ownership of memory that was given to the host and so
we will have to wait until the host responds.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
K. Y. Srinivasan [Wed, 27 Aug 2014 23:25:33 +0000 (16:25 -0700)]
Drivers: hv: vmbus: Cleanup vmbus_close_internal()
commit
98d731bb064a9d1817a6ca9bf8b97051334a7cfe upstream.
Eliminate calls to BUG_ON() in vmbus_close_internal().
We have chosen to potentially leak memory, than crash the guest
in case of failures.
In this version of the patch I have addressed comments from
Dan Carpenter (dan.carpenter@oracle.com).
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
K. Y. Srinivasan [Wed, 27 Aug 2014 23:25:32 +0000 (16:25 -0700)]
Drivers: hv: vmbus: Cleanup vmbus_teardown_gpadl()
commit
66be653083057358724d56d817e870e53fb81ca7 upstream.
Eliminate calls to BUG_ON() by properly handling errors. In cases where
rollback is possible, we will return the appropriate error to have the
calling code decide how to rollback state. In the case where we are
transferring ownership of the guest physical pages to the host,
we will wait for the host to respond.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
K. Y. Srinivasan [Wed, 27 Aug 2014 23:25:31 +0000 (16:25 -0700)]
Drivers: hv: vmbus: Cleanup vmbus_post_msg()
commit
fdeebcc62279119dbeafbc1a2e39e773839025fd upstream.
Posting messages to the host can fail because of transient resource
related failures. Correctly deal with these failures and increase the
number of attempts to post the message before giving up.
In this version of the patch, I have normalized the error code to
Linux error code.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kees Cook [Thu, 18 Sep 2014 18:25:37 +0000 (11:25 -0700)]
firmware_class: make sure fw requests contain a name
commit
471b095dfe0d693a8d624cbc716d1ee4d74eb437 upstream.
An empty firmware request name will trigger warnings when building
device names. Make sure this is caught earlier and rejected.
The warning was visible via the test_firmware.ko module interface:
echo -ne "\x00" > /sys/devices/virtual/misc/test_firmware/trigger_request
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xuelin Shi [Tue, 1 Jul 2014 08:32:38 +0000 (16:32 +0800)]
dmaengine: fix xor sources continuation
commit
87cea76384257e6ac3fa4791b6a6b9d0335f7457 upstream.
the partial xor result must be kept until the next
tx is generated.
Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joe Lawrence [Tue, 26 Aug 2014 21:10:41 +0000 (17:10 -0400)]
qla2xxx: Fix shost use-after-free on device removal
commit
db7157d4cfce6edf052452fb1d327d4d11b67f4c upstream.
Once calling scsi_host_put, be careful to not access qla_hw_data through
the Scsi_Host private data (ie, scsi_qla_host base_vha).
Fixes:
fe1b806f4f71 ("qla2xxx: Refactor shutdown code so some functionality can be reused")
Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arun Easi [Thu, 25 Sep 2014 10:14:45 +0000 (06:14 -0400)]
qla2xxx: Use correct offset to req-q-out for reserve calculation
commit
75554b68ac1e018bca00d68a430b92ada8ab52dd upstream.
Signed-off-by: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chris J Arges [Tue, 23 Sep 2014 14:22:25 +0000 (09:22 -0500)]
mptfusion: enable no_write_same for vmware scsi disks
commit
4089b71cc820a426d601283c92fcd4ffeb5139c2 upstream.
When using a virtual SCSI disk in a VMWare VM if blkdev_issue_zeroout is used
data can be improperly zeroed out using the mptfusion driver. This patch
disables write_same for this driver and the vmware subsystem_vendor which
ensures that manual zeroing out is used instead.
BugLink: http://bugs.launchpad.net/bugs/1371591
Reported-by: Bruce Lucas <bruce.lucas@mongodb.com>
Tested-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mike Christie [Mon, 29 Sep 2014 18:55:41 +0000 (13:55 -0500)]
be2iscsi: check ip buffer before copying
commit
a41a9ad3bbf61fae0b6bfb232153da60d14fdbd9 upstream.
Dan Carpenter found a issue where be2iscsi would copy the ip
from userspace to the driver buffer before checking the len
of the data being copied:
http://marc.info/?l=linux-scsi&m=
140982651504251&w=2
This patch just has us only copy what we the driver buffer
can support.
Tested-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xiubo Li [Sun, 28 Sep 2014 09:09:54 +0000 (17:09 +0800)]
regmap: fix possible ZERO_SIZE_PTR pointer dereferencing error.
commit
d6b41cb06044a7d895db82bdd54f6e4219970510 upstream.
Since we cannot make sure the 'val_count' will always be none zero
here, and then if it equals to zero, the kmemdup() will return
ZERO_SIZE_PTR, which equals to ((void *)16).
So this patch fix this with just doing the zero check before calling
kmemdup().
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pankaj Dubey [Sat, 27 Sep 2014 04:17:55 +0000 (09:47 +0530)]
regmap: fix NULL pointer dereference in _regmap_write/read
commit
5336be8416a71b5568d2cf54a2f2066abe9f2a53 upstream.
If LOG_DEVICE is defined and map->dev is NULL it will lead to NULL
pointer dereference. This patch fixes this issue by adding check for
dev->NULL in all such places in regmap.c
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xiubo Li [Sun, 28 Sep 2014 03:35:25 +0000 (11:35 +0800)]
regmap: debugfs: fix possbile NULL pointer dereference
commit
2c98e0c1cc6b8e86f1978286c3d4e0769ee9d733 upstream.
If 'map->dev' is NULL and there will lead dev_name() to be NULL pointer
dereference. So before dev_name(), we need to have check of the map->dev
pionter.
We also should make sure that the 'name' pointer shouldn't be NULL for
debugfs_create_dir(). So here using one default "dummy" debugfs name when
the 'name' pointer and 'map->dev' are both NULL.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Fri, 12 Sep 2014 12:11:58 +0000 (15:11 +0300)]
spi: dw-mid: check that DMA was inited before exit
commit
fb57862ead652454ceeb659617404c5f13bc34b5 upstream.
If the driver was compiled with DMA support, but DMA channels weren't acquired
by some reason, mid_spi_dma_exit() will crash the kernel.
Fixes:
7063c0d942a1 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Thu, 18 Sep 2014 17:08:51 +0000 (20:08 +0300)]
spi: dw-mid: respect 8 bit mode
commit
b41583e7299046abdc578c33f25ed83ee95b9b31 upstream.
In case of 8 bit mode and DMA usage we end up with every second byte written as
0. We have to respect bits_per_word settings what this patch actually does.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bryan O'Donoghue [Tue, 23 Sep 2014 23:26:24 +0000 (00:26 +0100)]
x86/intel/quark: Switch off CR4.PGE so TLB flush uses CR3 instead
commit
ee1b5b165c0a2f04d2107e634e51f05d0eb107de upstream.
Quark x1000 advertises PGE via the standard CPUID method
PGE bits exist in Quark X1000's PTEs. In order to flush
an individual PTE it is necessary to reload CR3 irrespective
of the PTE.PGE bit.
See Quark Core_DevMan_001.pdf section 6.4.11
This bug was fixed in Galileo kernels, unfixed vanilla kernels are expected to
crash and burn on this platform.
Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1411514784-14885-1-git-send-email-pure.logic@nexus-software.ie
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Matlack [Fri, 19 Sep 2014 23:03:25 +0000 (16:03 -0700)]
kvm: don't take vcpu mutex for obviously invalid vcpu ioctls
commit
2ea75be3219571d0ec009ce20d9971e54af96e09 upstream.
vcpu ioctls can hang the calling thread if issued while a vcpu is running.
However, invalid ioctls can happen when userspace tries to probe the kind
of file descriptors (e.g. isatty() calls ioctl(TCGETS)); in that case,
we know the ioctl is going to be rejected as invalid anyway and we can
fail before trying to take the vcpu mutex.
This patch does not change functionality, it just makes invalid ioctls
fail faster.
Signed-off-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christian Borntraeger [Wed, 3 Sep 2014 14:21:32 +0000 (16:21 +0200)]
KVM: s390: unintended fallthrough for external call
commit
f346026e55f1efd3949a67ddd1dcea7c1b9a615e upstream.
We must not fallthrough if the conditions for external call are not met.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Matlack [Mon, 18 Aug 2014 22:46:06 +0000 (15:46 -0700)]
kvm: fix potentially corrupt mmio cache
commit
ee3d1570b58677885b4552bce8217fda7b226a68 upstream.
vcpu exits and memslot mutations can run concurrently as long as the
vcpu does not aquire the slots mutex. Thus it is theoretically possible
for memslots to change underneath a vcpu that is handling an exit.
If we increment the memslot generation number again after
synchronize_srcu_expedited(), vcpus can safely cache memslot generation
without maintaining a single rcu_dereference through an entire vm exit.
And much of the x86/kvm code does not maintain a single rcu_dereference
of the current memslots during each exit.
We can prevent the following case:
vcpu (CPU 0) | thread (CPU 1)
--------------------------------------------+--------------------------
1 vm exit |
2 srcu_read_unlock(&kvm->srcu) |
3 decide to cache something based on |
old memslots |
4 | change memslots
| (increments generation)
5 | synchronize_srcu(&kvm->srcu);
6 retrieve generation # from new memslots |
7 tag cache with new memslot generation |
8 srcu_read_unlock(&kvm->srcu) |
... |
<action based on cache occurs even |
though the caching decision was based |
on the old memslots> |
... |
<action *continues* to occur until next |
memslot generation change, which may |
be never> |
|
By incrementing the generation after synchronizing with kvm->srcu readers,
we ensure that the generation retrieved in (6) will become invalid soon
after (8).
Keeping the existing increment is not strictly necessary, but we
do keep it and just move it for consistency from update_memslots to
install_new_memslots. It invalidates old cached MMIOs immediately,
instead of having to wait for the end of synchronize_srcu_expedited,
which makes the code more clearly correct in case CPU 1 is preempted
right after synchronize_srcu() returns.
To avoid halving the generation space in SPTEs, always presume that the
low bit of the generation is zero when reconstructing a generation number
out of an SPTE. This effectively disables MMIO caching in SPTEs during
the call to synchronize_srcu_expedited. Using the low bit this way is
somewhat like a seqcount---where the protected thing is a cache, and
instead of retrying we can simply punt if we observe the low bit to be 1.
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Matlack [Mon, 18 Aug 2014 22:46:07 +0000 (15:46 -0700)]
kvm: x86: fix stale mmio cache bug
commit
56f17dd3fbc44adcdbc3340fe3988ddb833a47a7 upstream.
The following events can lead to an incorrect KVM_EXIT_MMIO bubbling
up to userspace:
(1) Guest accesses gpa X without a memory slot. The gfn is cached in
struct kvm_vcpu_arch (mmio_gfn). On Intel EPT-enabled hosts, KVM sets
the SPTE write-execute-noread so that future accesses cause
EPT_MISCONFIGs.
(2) Host userspace creates a memory slot via KVM_SET_USER_MEMORY_REGION
covering the page just accessed.
(3) Guest attempts to read or write to gpa X again. On Intel, this
generates an EPT_MISCONFIG. The memory slot generation number that
was incremented in (2) would normally take care of this but we fast
path mmio faults through quickly_check_mmio_pf(), which only checks
the per-vcpu mmio cache. Since we hit the cache, KVM passes a
KVM_EXIT_MMIO up to userspace.
This patch fixes the issue by using the memslot generation number
to validate the mmio cache.
Signed-off-by: David Matlack <dmatlack@google.com>
[xiaoguangrong: adjust the code to make it simpler for stable-tree fix.]
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Tested-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Filipe Manana [Sun, 30 Mar 2014 22:02:53 +0000 (23:02 +0100)]
Btrfs: send, fix data corruption due to incorrect hole detection
commit
766b5e5ae78dd04a93a275690a49e23d7dcb1f39 upstream.
During an incremental send, when we finish processing an inode (corresponding to
a regular file) we would assume the gap between the end of the last processed file
extent and the file's size corresponded to a file hole, and therefore incorrectly
send a bunch of zero bytes to overwrite that region in the file.
This affects only kernel 3.14.
Reproducer:
mkfs.btrfs -f /dev/sdc
mount /dev/sdc /mnt
xfs_io -f -c "falloc -k 0
268435456" /mnt/foo
btrfs subvolume snapshot -r /mnt /mnt/mysnap0
xfs_io -c "pwrite -S 0x01 -b 9216
16190218 9216" /mnt/foo
xfs_io -c "pwrite -S 0x02 -b 1121
198720104 1121" /mnt/foo
xfs_io -c "pwrite -S 0x05 -b 9216
107887439 9216" /mnt/foo
xfs_io -c "pwrite -S 0x06 -b 9216
225520207 9216" /mnt/foo
xfs_io -c "pwrite -S 0x07 -b 67584
102138300 67584" /mnt/foo
xfs_io -c "pwrite -S 0x08 -b 7000
94897484 7000" /mnt/foo
xfs_io -c "pwrite -S 0x09 -b 113664
245083212 113664" /mnt/foo
xfs_io -c "pwrite -S 0x10 -b 123
17937788 123" /mnt/foo
xfs_io -c "pwrite -S 0x11 -b 39936
229573311 39936" /mnt/foo
xfs_io -c "pwrite -S 0x12 -b 67584
174792222 67584" /mnt/foo
xfs_io -c "pwrite -S 0x13 -b 9216
249253213 9216" /mnt/foo
xfs_io -c "pwrite -S 0x16 -b 67584
150046083 67584" /mnt/foo
xfs_io -c "pwrite -S 0x17 -b 39936
118246040 39936" /mnt/foo
xfs_io -c "pwrite -S 0x18 -b 67584
215965442 67584" /mnt/foo
xfs_io -c "pwrite -S 0x19 -b 33792
97096725 33792" /mnt/foo
xfs_io -c "pwrite -S 0x20 -b 125952
166300596 125952" /mnt/foo
xfs_io -c "pwrite -S 0x21 -b 123 1078957 123" /mnt/foo
xfs_io -c "pwrite -S 0x25 -b 9216
212044492 9216" /mnt/foo
xfs_io -c "pwrite -S 0x26 -b 7000
265037146 7000" /mnt/foo
xfs_io -c "pwrite -S 0x27 -b 42757
215922685 42757" /mnt/foo
xfs_io -c "pwrite -S 0x28 -b 7000
69865411 7000" /mnt/foo
xfs_io -c "pwrite -S 0x29 -b 67584
67948958 67584" /mnt/foo
xfs_io -c "pwrite -S 0x30 -b 39936
266967019 39936" /mnt/foo
xfs_io -c "pwrite -S 0x31 -b 1121
19582453 1121" /mnt/foo
xfs_io -c "pwrite -S 0x32 -b 17408
257710255 17408" /mnt/foo
xfs_io -c "pwrite -S 0x33 -b 39936 3895518 39936" /mnt/foo
xfs_io -c "pwrite -S 0x34 -b 125952
12045847 125952" /mnt/foo
xfs_io -c "pwrite -S 0x35 -b 17408
19156379 17408" /mnt/foo
xfs_io -c "pwrite -S 0x36 -b 39936
50160066 39936" /mnt/foo
xfs_io -c "pwrite -S 0x37 -b 113664 9549793 113664" /mnt/foo
xfs_io -c "pwrite -S 0x38 -b 105472
94391506 105472" /mnt/foo
xfs_io -c "pwrite -S 0x39 -b 23552
143632863 23552" /mnt/foo
xfs_io -c "pwrite -S 0x40 -b 39936
241283845 39936" /mnt/foo
xfs_io -c "pwrite -S 0x41 -b 113664
199937606 113664" /mnt/foo
xfs_io -c "pwrite -S 0x42 -b 67584
67380093 67584" /mnt/foo
xfs_io -c "pwrite -S 0x43 -b 67584
26793129 67584" /mnt/foo
xfs_io -c "pwrite -S 0x44 -b 39936
14421913 39936" /mnt/foo
xfs_io -c "pwrite -S 0x45 -b 123
253097405 123" /mnt/foo
xfs_io -c "pwrite -S 0x46 -b 1121
128233424 1121" /mnt/foo
xfs_io -c "pwrite -S 0x47 -b 105472
91577959 105472" /mnt/foo
xfs_io -c "pwrite -S 0x48 -b 1121 7245381 1121" /mnt/foo
xfs_io -c "pwrite -S 0x49 -b 113664
182414694 113664" /mnt/foo
xfs_io -c "pwrite -S 0x50 -b 9216
32750608 9216" /mnt/foo
xfs_io -c "pwrite -S 0x51 -b 67584
266546049 67584" /mnt/foo
xfs_io -c "pwrite -S 0x52 -b 67584
87969398 67584" /mnt/foo
xfs_io -c "pwrite -S 0x53 -b 9216
260848797 9216" /mnt/foo
xfs_io -c "pwrite -S 0x54 -b 39936
119461243 39936" /mnt/foo
xfs_io -c "pwrite -S 0x55 -b 7000
200178693 7000" /mnt/foo
xfs_io -c "pwrite -S 0x56 -b 9216
243316029 9216" /mnt/foo
xfs_io -c "pwrite -S 0x57 -b 7000
209658229 7000" /mnt/foo
xfs_io -c "pwrite -S 0x58 -b 101376
179745192 101376" /mnt/foo
xfs_io -c "pwrite -S 0x59 -b 9216
64012300 9216" /mnt/foo
xfs_io -c "pwrite -S 0x60 -b 125952
181705139 125952" /mnt/foo
xfs_io -c "pwrite -S 0x61 -b 23552
235737348 23552" /mnt/foo
xfs_io -c "pwrite -S 0x62 -b 113664
106021355 113664" /mnt/foo
xfs_io -c "pwrite -S 0x63 -b 67584
135753552 67584" /mnt/foo
xfs_io -c "pwrite -S 0x64 -b 23552
95730888 23552" /mnt/foo
xfs_io -c "pwrite -S 0x65 -b 11
17311415 11" /mnt/foo
xfs_io -c "pwrite -S 0x66 -b 33792
120695553 33792" /mnt/foo
xfs_io -c "pwrite -S 0x67 -b 9216
17164631 9216" /mnt/foo
xfs_io -c "pwrite -S 0x68 -b 9216
136065853 9216" /mnt/foo
xfs_io -c "pwrite -S 0x69 -b 67584
37752198 67584" /mnt/foo
xfs_io -c "pwrite -S 0x70 -b 101376
189717473 101376" /mnt/foo
xfs_io -c "pwrite -S 0x71 -b 7000
227463698 7000" /mnt/foo
xfs_io -c "pwrite -S 0x72 -b 9216
12655137 9216" /mnt/foo
xfs_io -c "pwrite -S 0x73 -b 7000 7488866 7000" /mnt/foo
xfs_io -c "pwrite -S 0x74 -b 113664
87813649 113664" /mnt/foo
xfs_io -c "pwrite -S 0x75 -b 33792
25802183 33792" /mnt/foo
xfs_io -c "pwrite -S 0x76 -b 39936
93524024 39936" /mnt/foo
xfs_io -c "pwrite -S 0x77 -b 33792
113336388 33792" /mnt/foo
xfs_io -c "pwrite -S 0x78 -b 105472
184955320 105472" /mnt/foo
xfs_io -c "pwrite -S 0x79 -b 101376
225691598 101376" /mnt/foo
xfs_io -c "pwrite -S 0x80 -b 23552
77023155 23552" /mnt/foo
xfs_io -c "pwrite -S 0x81 -b 11
201888192 11" /mnt/foo
xfs_io -c "pwrite -S 0x82 -b 11
115332492 11" /mnt/foo
xfs_io -c "pwrite -S 0x83 -b 67584
230278015 67584" /mnt/foo
xfs_io -c "pwrite -S 0x84 -b 11
120589073 11" /mnt/foo
xfs_io -c "pwrite -S 0x85 -b 125952
202207819 125952" /mnt/foo
xfs_io -c "pwrite -S 0x86 -b 113664
86672080 113664" /mnt/foo
xfs_io -c "pwrite -S 0x87 -b 17408
208459603 17408" /mnt/foo
xfs_io -c "pwrite -S 0x88 -b 7000
73372211 7000" /mnt/foo
xfs_io -c "pwrite -S 0x89 -b 7000
42252122 7000" /mnt/foo
xfs_io -c "pwrite -S 0x90 -b 23552
46784881 23552" /mnt/foo
xfs_io -c "pwrite -S 0x91 -b 101376
63172351 101376" /mnt/foo
xfs_io -c "pwrite -S 0x92 -b 23552
59341931 23552" /mnt/foo
xfs_io -c "pwrite -S 0x93 -b 39936
239599283 39936" /mnt/foo
xfs_io -c "pwrite -S 0x94 -b 67584
175643105 67584" /mnt/foo
xfs_io -c "pwrite -S 0x97 -b 23552
105534880 23552" /mnt/foo
xfs_io -c "pwrite -S 0x98 -b 113664 8236844 113664" /mnt/foo
xfs_io -c "pwrite -S 0x99 -b 125952
144489686 125952" /mnt/foo
xfs_io -c "pwrite -S 0xa0 -b 7000
73273112 7000" /mnt/foo
xfs_io -c "pwrite -S 0xa1 -b 125952
194580243 125952" /mnt/foo
xfs_io -c "pwrite -S 0xa2 -b 123
56296779 123" /mnt/foo
xfs_io -c "pwrite -S 0xa3 -b 11
233066845 11" /mnt/foo
xfs_io -c "pwrite -S 0xa4 -b 39936
197727090 39936" /mnt/foo
xfs_io -c "pwrite -S 0xa5 -b 101376
53579812 101376" /mnt/foo
xfs_io -c "pwrite -S 0xa6 -b 9216
85669738 9216" /mnt/foo
xfs_io -c "pwrite -S 0xa7 -b 125952
21266322 125952" /mnt/foo
xfs_io -c "pwrite -S 0xa8 -b 23552
125726568 23552" /mnt/foo
xfs_io -c "pwrite -S 0xa9 -b 9216
18423680 9216" /mnt/foo
xfs_io -c "pwrite -S 0xb0 -b 1121
165901483 1121" /mnt/foo
btrfs subvolume snapshot -r /mnt /mnt/mysnap1
xfs_io -c "pwrite -S 0xff -b 10
16190218 10" /mnt/foo
btrfs subvolume snapshot -r /mnt /mnt/mysnap2
md5sum /mnt/foo # returns
79e53f1466bfc09fd82b450689e6119e
md5sum /mnt/mysnap2/foo # returns
79e53f1466bfc09fd82b450689e6119e too
btrfs send /mnt/mysnap1 -f /tmp/1.snap
btrfs send -p /mnt/mysnap1 /mnt/mysnap2 -f /tmp/2.snap
mkfs.btrfs -f /dev/sdc
mount /dev/sdc /mnt
btrfs receive /mnt -f /tmp/1.snap
btrfs receive /mnt -f /tmp/2.snap
md5sum /mnt/mysnap2/foo # returns
2bb414c5155767cedccd7063e51beabd !!
A testcase for xfstests follows soon too.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Ahmad [Tue, 2 Sep 2014 10:45:20 +0000 (13:45 +0300)]
pci_ids: Add support for Intel Quark ILB
commit
bb048713bba3ead39f6112910906d9fe3f88ede7 upstream.
This patch adds the PCI id for Intel Quark ILB.
It will be used for GPIO and Multifunction device driver.
Signed-off-by: Josef Ahmad <josef.ahmad@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Chang Rebecca Swee Fun <rebecca.swee.fun.chang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bryan O'Donoghue [Mon, 4 Aug 2014 17:22:54 +0000 (10:22 -0700)]
usb: pch_udc: usb gadget device support for Intel Quark X1000
commit
a68df7066a6f974db6069e0b93c498775660a114 upstream.
This patch is to enable the USB gadget device for Intel Quark X1000
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@intel.com>
Signed-off-by: Bing Niu <bing.niu@intel.com>
Signed-off-by: Alvin (Weike) Chen <alvin.chen@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Chang Rebecca Swee Fun <rebecca.swee.fun.chang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Lutomirski [Wed, 8 Oct 2014 19:32:47 +0000 (12:32 -0700)]
fs: Add a missing permission check to do_umount
commit
a1480dcc3c706e309a88884723446f2e84fedd5b upstream.
Accessing do_remount_sb should require global CAP_SYS_ADMIN, but
only one of the two call sites was appropriately protected.
Fixes CVE-2014-7975.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Fri, 26 Sep 2014 15:30:06 +0000 (08:30 -0700)]
Btrfs: fix race in WAIT_SYNC ioctl
commit
42383020beb1cfb05f5d330cc311931bc4917a97 upstream.
We check whether transid is already committed via last_trans_committed and
then search through trans_list for pending transactions. If
last_trans_committed is updated by btrfs_commit_transaction after we check
it (there is no locking), we will fail to find the committed transaction
and return EINVAL to the caller. This has been observed occasionally by
ceph-osd (which uses this ioctl heavily).
Fix by rechecking whether the provided transid <= last_trans_committed
after the search fails, and if so return 0.
Signed-off-by: Sage Weil <sage@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Fri, 19 Sep 2014 19:43:34 +0000 (15:43 -0400)]
Btrfs: fix build_backref_tree issue with multiple shared blocks
commit
bbe9051441effce51c9a533d2c56440df64db2d7 upstream.
Marc Merlin sent me a broken fs image months ago where it would blow up in the
upper->checked BUG_ON() in build_backref_tree. This is because we had a
scenario like this
block a -- level 4 (not shared)
|
block b -- level 3 (reloc block, shared)
|
block c -- level 2 (not shared)
|
block d -- level 1 (shared)
|
block e -- level 0 (shared)
We go to build a backref tree for block e, we notice block d is shared and add
it to the list of blocks to lookup it's backrefs for. Now when we loop around
we will check edges for the block, so we will see we looked up block c last
time. So we lookup block d and then see that the block that points to it is
block c and we can just skip that edge since we've already been up this path.
The problem is because we clear need_check when we see block d (as it is shared)
we never add block b as needing to be checked. And because block c is in our
path already we bail out before we walk up to block b and add it to the backref
check list.
To fix this we need to reset need_check if we trip over a block that doesn't
need to be checked. This will make sure that any subsequent blocks in the path
as we're walking up afterwards are added to the list to be processed. With this
patch I can now mount Marc's fs image and it'll complete the balance without
panicing. Thanks,
Reported-by: Marc MERLIN <marc@merlins.org>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Fri, 19 Sep 2014 14:40:00 +0000 (10:40 -0400)]
Btrfs: cleanup error handling in build_backref_tree
commit
75bfb9aff45e44625260f52a5fd581b92ace3e62 upstream.
When balance panics it tends to panic in the
BUG_ON(!upper->checked);
test, because it means it couldn't build the backref tree properly. This is
annoying to users and frankly a recoverable error, nothing in this function is
actually fatal since it is just an in-memory building of the backrefs for a
given bytenr. So go through and change all the BUG_ON()'s to ASSERT()'s, and
fix the BUG_ON(!upper->checked) thing to just return an error.
This patch also fixes the error handling so it tears down the work we've done
properly. This code was horribly broken since we always just panic'ed instead
of actually erroring out, so it needed to be completely re-worked. With this
patch my broken image no longer panics when I mount it. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Thu, 18 Sep 2014 15:30:44 +0000 (11:30 -0400)]
Btrfs: try not to ENOSPC on log replay
commit
1d52c78afbbf80b58299e076a159617d6b42fe3c upstream.
When doing log replay we may have to update inodes, which traditionally goes
through our delayed inode stuff. This will try to move space over from the
trans handle, but we don't reserve space in our trans handle on replay since we
don't know how much we will need, so instead we try to flush. But because we
have a trans handle open we won't flush anything, so if we are out of reserve
space we will simply return ENOSPC. Since we know that if an operation made it
into the log then we definitely had space before the box bought the farm then we
don't need to worry about doing this space reservation. Use the
fs_info->log_root_recovering flag to skip the delayed inode stuff and update the
item directly. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Tue, 16 Sep 2014 09:49:30 +0000 (17:49 +0800)]
Btrfs: fix up bounds checking in lseek
commit
4d1a40c66bed0b3fa43b9da5fbd5cbe332e4eccf upstream.
An user reported this, it is because that lseek's SEEK_SET/SEEK_CUR/SEEK_END
allow a negative value for @offset, but btrfs's SEEK_DATA/SEEK_HOLE don't
prepare for that and convert the negative @offset into unsigned type,
so we get (end < start) warning.
[ 1269.835374] ------------[ cut here ]------------
[ 1269.836809] WARNING: CPU: 0 PID: 1241 at fs/btrfs/extent_io.c:430 insert_state+0x11d/0x140()
[ 1269.838816] BTRFS: end < start 4094
18446744073709551615
[ 1269.840334] CPU: 0 PID: 1241 Comm: a.out Tainted: G W 3.16.0+ #306
[ 1269.858229] Call Trace:
[ 1269.858612] [<
ffffffff81801a69>] dump_stack+0x4e/0x68
[ 1269.858952] [<
ffffffff8107894c>] warn_slowpath_common+0x8c/0xc0
[ 1269.859416] [<
ffffffff81078a36>] warn_slowpath_fmt+0x46/0x50
[ 1269.859929] [<
ffffffff813b0fbd>] insert_state+0x11d/0x140
[ 1269.860409] [<
ffffffff813b1396>] __set_extent_bit+0x3b6/0x4e0
[ 1269.860805] [<
ffffffff813b21c7>] lock_extent_bits+0x87/0x200
[ 1269.861697] [<
ffffffff813a5b28>] btrfs_file_llseek+0x148/0x2a0
[ 1269.862168] [<
ffffffff811f201e>] SyS_lseek+0xae/0xc0
[ 1269.862620] [<
ffffffff8180b212>] system_call_fastpath+0x16/0x1b
[ 1269.862970] ---[ end trace
4d33ea885832054b ]---
This assumes that btrfs starts finding DATA/HOLE from the beginning of file
if the assigned @offset is negative.
Also we add alignment for lock_extent_bits 's range.
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Filipe Manana [Thu, 11 Sep 2014 10:44:49 +0000 (11:44 +0100)]
Btrfs: add missing compression property remove in btrfs_ioctl_setflags
commit
78a017a2c92df9b571db0a55a016280f9019c65e upstream.
The behaviour of a 'chattr -c' consists of getting the current flags,
clearing the FS_COMPR_FL bit and then sending the result to the set
flags ioctl - this means the bit FS_NOCOMP_FL isn't set in the flags
passed to the ioctl. This results in the compression property not being
cleared from the inode - it was cleared only if the bit FS_NOCOMP_FL
was set in the received flags.
Reproducer:
$ mkfs.btrfs -f /dev/sdd
$ mount /dev/sdd /mnt && cd /mnt
$ mkdir a
$ chattr +c a
$ touch a/file
$ lsattr a/file
--------c------- a/file
$ chattr -c a
$ touch a/file2
$ lsattr a/file2
--------c------- a/file2
$ lsattr -d a
---------------- a
Reported-by: Andreas Schneider <asn@cryptomilk.org>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Sterba [Wed, 23 Jul 2014 12:39:35 +0000 (14:39 +0200)]
btrfs: wake up transaction thread from SYNC_FS ioctl
commit
2fad4e83e12591eb3bd213875b9edc2d18e93383 upstream.
The transaction thread may want to do more work, namely it pokes the
cleaner ktread that will start processing uncleaned subvols.
This can be triggered by user via the 'btrfs fi sync' command, otherwise
there was a delay up to 30 seconds before the cleaner started to clean
old snapshots.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Wed, 15 Oct 2014 06:42:04 +0000 (08:42 +0200)]
Linux 3.14.22
Bryan O'Donoghue [Tue, 23 Sep 2014 00:21:11 +0000 (01:21 +0100)]
serial: 8250: Add Quark X1000 to 8250_pci.c
commit
1ede7dcca3c4fa15a518ab0473126f9c3e621e4c upstream.
Quark X1000 contains two designware derived 8250 serial ports.
Each port has a unique PCI configuration space consisting of
BAR0:UART BAR1:DMA respectively.
Unlike the standard 8250 the register width is 32 bits for RHR,IER etc
The Quark UART has a fundamental clock @ 44.2368 MHz allowing for a
bitrate of up to about 2.76 megabits per second.
This patch enables standard 8250 mode
Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cristian Stoica [Thu, 14 Aug 2014 10:51:57 +0000 (13:51 +0300)]
crypto: caam - fix addressing of struct member
commit
4451d494b1910bf7b7f8381a637d0fe6d2142467 upstream.
buf_0 and buf_1 in caam_hash_state are not next to each other.
Accessing buf_1 is incorrect from &buf_0 with an offset of only
size_of(buf_0). The same issue is also with buflen_0 and buflen_1
Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Felipe Balbi [Mon, 15 Sep 2014 14:03:24 +0000 (09:03 -0500)]
usb: musb: dsps: kill OTG timer on suspend
commit
468bcc2a2ca071f652009d2d20d97f2437630cae upstream.
if we don't make sure to kill the timer, it could
expire after we have already gated our clocks.
That will trigger a Data Abort exception because
we would try to access register while clock is gated.
Fix that bug.
Fixes 869c597 (usb: musb: dsps: add support for suspend and resume)
Tested-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andreas Bomholtz [Mon, 22 Sep 2014 07:50:43 +0000 (09:50 +0200)]
USB: cp210x: add support for Seluxit USB dongle
commit
dee80ad12d2b1b304286a707fde7ab05d1fc7bab upstream.
Added the Seluxit ApS USB Serial Dongle to cp210x driver.
Signed-off-by: Andreas Bomholtz <andreas@seluxit.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joe Savage [Sat, 20 Sep 2014 13:01:16 +0000 (08:01 -0500)]
USB: serial: cp210x: added Ketra N1 wireless interface support
commit
bfc2d7dfdd761ae3beccdb26abebe03cef042f46 upstream.
Added support for Ketra N1 wireless interface, which uses the
Silicon Labs' CP2104 USB to UART bridge with customized PID 8946.
Signed-off-by: Joe Savage <joe.savage@goketra.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lu Baolu [Fri, 19 Sep 2014 02:13:50 +0000 (10:13 +0800)]
USB: Add device quirk for ASUS T100 Base Station keyboard
commit
ddbe1fca0bcb87ca8c199ea873a456ca8a948567 upstream.
This full-speed USB device generates spurious remote wakeup event
as soon as USB_DEVICE_REMOTE_WAKEUP feature is set. As the result,
Linux can't enter system suspend and S0ix power saving modes once
this keyboard is used.
This patch tries to introduce USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk.
With this quirk set, wakeup capability will be ignored during
device configure.
This patch could be back-ported to kernels as old as 2.6.39.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Per Hurtig [Thu, 12 Jun 2014 15:08:32 +0000 (17:08 +0200)]
tcp: fixing TLP's FIN recovery
[ Upstream commit
bef1909ee3ed1ca39231b260a8d3b4544ecd0c8f ]
Fix to a problem observed when losing a FIN segment that does not
contain data. In such situations, TLP is unable to recover from
*any* tail loss and instead adds at least PTO ms to the
retransmission process, i.e., RTO = RTO + PTO.
Signed-off-by: Per Hurtig <per.hurtig@kau.se>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Nandita Dukkipati <nanditad@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlad Yasevich [Fri, 3 Oct 2014 22:16:20 +0000 (18:16 -0400)]
sctp: handle association restarts when the socket is closed.
[ Upstream commit
bdf6fa52f01b941d4a80372d56de465bdbbd1d23 ]
Currently association restarts do not take into consideration the
state of the socket. When a restart happens, the current assocation
simply transitions into established state. This creates a condition
where a remote system, through a the restart procedure, may create a
local association that is no way reachable by user. The conditions
to trigger this are as follows:
1) Remote does not acknoledge some data causing data to remain
outstanding.
2) Local application calls close() on the socket. Since data
is still outstanding, the association is placed in SHUTDOWN_PENDING
state. However, the socket is closed.
3) The remote tries to create a new association, triggering a restart
on the local system. The association moves from SHUTDOWN_PENDING
to ESTABLISHED. At this point, it is no longer reachable by
any socket on the local system.
This patch addresses the above situation by moving the newly ESTABLISHED
association into SHUTDOWN-SENT state and bundling a SHUTDOWN after
the COOKIE-ACK chunk. This way, the restarted associate immidiately
enters the shutdown procedure and forces the termination of the
unreachable association.
Reported-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joe Lawrence [Fri, 3 Oct 2014 13:58:34 +0000 (09:58 -0400)]
team: avoid race condition in scheduling delayed work
[ Upstream commit
47549650abd13d873fd2e5fc218db19e21031074 ]
When team_notify_peers and team_mcast_rejoin are called, they both reset
their respective .count_pending atomic variable. Then when the actual
worker function is executed, the variable is atomically decremented.
This pattern introduces a potential race condition where the
.count_pending rolls over and the worker function keeps rescheduling
until .count_pending decrements to zero again:
THREAD 1 THREAD 2
======== ========
team_notify_peers(teamX)
atomic_set count_pending = 1
schedule_delayed_work
team_notify_peers(teamX)
atomic_set count_pending = 1
team_notify_peers_work
atomic_dec_and_test
count_pending = 0
(return)
schedule_delayed_work
team_notify_peers_work
atomic_dec_and_test
count_pending = -1
schedule_delayed_work
(repeat until count_pending = 0)
Instead of assigning a new value to .count_pending, use atomic_add to
tack-on the additional desired worker function invocations.
Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Fixes:
fc423ff00df3a19554414ee ("team: add peer notification")
Fixes:
492b200efdd20b8fcfdac87 ("team: add support for sending multicast rejoins")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nicolas Dichtel [Thu, 2 Oct 2014 16:26:49 +0000 (18:26 +0200)]
ip6_gre: fix flowi6_proto value in xmit path
[ Upstream commit
3be07244b7337760a3269d56b2f4a63e72218648 ]
In xmit path, we build a flowi6 which will be used for the output route lookup.
We are sending a GRE packet, neither IPv4 nor IPv6 encapsulated packet, thus the
protocol should be IPPROTO_GRE.
Fixes:
c12b395a4664 ("gre: Support GRE over IPv6")
Reported-by: Matthieu Ternisien d'Ouville <matthieu.tdo@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KY Srinivasan [Mon, 29 Sep 2014 05:16:43 +0000 (22:16 -0700)]
hyperv: Fix a bug in netvsc_start_xmit()
[ Upstream commit
dedb845ded56ded1c62f5398a94ffa8615d4592d ]
After the packet is successfully sent, we should not touch the skb
as it may have been freed. This patch is based on the work done by
Long Li <longli@microsoft.com>.
In this version of the patch I have fixed issues pointed out by David.
David, please queue this up for stable.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Long Li <longli@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Mon, 29 Sep 2014 17:34:29 +0000 (10:34 -0700)]
gro: fix aggregation for skb using frag_list
[ Upstream commit
73d3fe6d1c6d840763ceafa9afae0aaafa18c4b5 ]
In commit
8a29111c7ca6 ("net: gro: allow to build full sized skb")
I added a regression for linear skb that traditionally force GRO
to use the frag_list fallback.
Erez Shitrit found that at most two segments were aggregated and
the "if (skb_gro_len(p) != pinfo->gso_size)" test was failing.
This is because pinfo at this spot still points to the last skb in the
chain, instead of the first one, where we find the correct gso_size
information.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes:
8a29111c7ca6 ("net: gro: allow to build full sized skb")
Reported-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Soren Brinkmann [Mon, 22 Sep 2014 23:49:08 +0000 (16:49 -0700)]
Revert "net/macb: add pinctrl consumer support"
[ Upstream commit
9026968abe7ad102f4ac5c6d96d733643f75399c ]
This reverts commit
8ef29f8aae524bd51298fb10ac6a5ce6c4c5a3d8.
The driver core already calls pinctrl_get() and claims the default
state. There is no need to replicate this in the driver.
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlad Yasevich [Mon, 22 Sep 2014 20:34:17 +0000 (16:34 -0400)]
macvtap: Fix race between device delete and open.
[ Upstream commit
40b8fe45d1f094e3babe7b2dc2b71557ab71401d ]
In macvtap device delete and open calls can race and
this causes a list curruption of the vlan queue_list.
The race intself is triggered by the idr accessors
that located the vlan device. The device is stored
into and removed from the idr under both an rtnl and
a mutex. However, when attempting to locate the device
in idr, only a mutex is taken. As a result, once cpu
perfoming a delete may take an rtnl and wait for the mutex,
while another cput doing an open() will take the idr
mutex first to fetch the device pointer and later take
an rtnl to add a queue for the device which may have
just gotten deleted.
With this patch, we now hold the rtnl for the duration
of the macvtap_open() call thus making sure that
open will not race with delete.
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Jason Wang <jasowang@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steffen Klassert [Tue, 16 Sep 2014 08:08:49 +0000 (10:08 +0200)]
xfrm: Generate queueing routes only from route lookup functions
[ Upstream commit
b8c203b2d2fc961bafd53b41d5396bbcdec55998 ]
Currently we genarate a queueing route if we have matching policies
but can not resolve the states and the sysctl xfrm_larval_drop is
disabled. Here we assume that dst_output() is called to kill the
queued packets. Unfortunately this assumption is not true in all
cases, so it is possible that these packets leave the system unwanted.
We fix this by generating queueing routes only from the
route lookup functions, here we can guarantee a call to
dst_output() afterwards.
Fixes:
a0073fe18e71 ("xfrm: Add a state resolution packet queue")
Reported-by: Konstantinos Kolelis <k.kolelis@sirrix.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>