Tejun Heo [Fri, 16 Sep 2016 19:49:34 +0000 (15:49 -0400)]
workqueue: remove keventd_up()
keventd_up() no longer has in-kernel users. Remove it and make
wq_online static.
Signed-off-by: Tejun Heo <tj@kernel.org>
Tejun Heo [Fri, 16 Sep 2016 19:49:34 +0000 (15:49 -0400)]
debugobj, workqueue: remove keventd_up() usage
Now that workqueue can handle work item queueing from very early
during boot, there is no need to gate schedule_work() while
!keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Tejun Heo [Fri, 16 Sep 2016 19:49:34 +0000 (15:49 -0400)]
slab, workqueue: remove keventd_up() usage
Now that workqueue can handle work item queueing from very early
during boot, there is no need to gate schedule_delayed_work_on() while
!keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Tejun Heo [Fri, 16 Sep 2016 19:49:33 +0000 (15:49 -0400)]
power, workqueue: remove keventd_up() usage
Now that workqueue can handle work item queueing/cancelling from very
early during boot, there is no need to gate cancel_delayed_work_sync()
while !keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Qiao Zhou <qiaozhou@asrmicro.com>
Tejun Heo [Fri, 16 Sep 2016 19:49:33 +0000 (15:49 -0400)]
tty, workqueue: remove keventd_up() usage
Now that workqueue can handle work item queueing from very early
during boot, there is no need to delay schedule_work() while
!keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Tejun Heo [Fri, 16 Sep 2016 19:49:32 +0000 (15:49 -0400)]
mce, workqueue: remove keventd_up() usage
Now that workqueue can handle work item queueing from very early
during boot, there is no need to gate schedule_work() with
keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: linux-edac@vger.kernel.org
Tejun Heo [Fri, 16 Sep 2016 19:49:32 +0000 (15:49 -0400)]
workqueue: make workqueue available early during boot
Workqueue is currently initialized in an early init call; however,
there are cases where early boot code has to be split and reordered to
come after workqueue initialization or the same code path which makes
use of workqueues is used both before workqueue initailization and
after. The latter cases have to gate workqueue usages with
keventd_up() tests, which is nasty and easy to get wrong.
Workqueue usages have become widespread and it'd be a lot more
convenient if it can be used very early from boot. This patch splits
workqueue initialization into two steps. workqueue_init_early() which
sets up the basic data structures so that workqueues can be created
and work items queued, and workqueue_init() which actually brings up
workqueues online and starts executing queued work items. The former
step can be done very early during boot once memory allocation,
cpumasks and idr are initialized. The latter right after kthreads
become available.
This allows work item queueing and canceling from very early boot
which is what most of these use cases want.
* As systemd_wq being initialized doesn't indicate that workqueue is
fully online anymore, update keventd_up() to test wq_online instead.
The follow-up patches will get rid of all its usages and the
function itself.
* Flushing doesn't make sense before workqueue is fully initialized.
The flush functions trigger WARN and return immediately before fully
online.
* Work items are never in-flight before fully online. Canceling can
always succeed by skipping the flush step.
* Some code paths can no longer assume to be called with irq enabled
as irq is disabled during early boot. Use irqsave/restore
operations instead.
v2: Watchdog init, which requires timer to be running, moved from
workqueue_init_early() to workqueue_init().
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/CA+55aFx0vPuMuxn00rBSM192n-Du5uxy+4AvKa0SBSOVJeuCGg@mail.gmail.com
Tejun Heo [Mon, 5 Sep 2016 12:54:06 +0000 (08:54 -0400)]
workqueue: dump workqueue state on sanity check failures in destroy_workqueue()
destroy_workqueue() performs a number of sanity checks to ensure that
the workqueue is empty before proceeding with destruction. However,
it's not always easy to tell what's going on just from the warning
message. Let's dump workqueue state after sanity check failures to
help debugging.
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/CACT4Y+Zs6vkjHo9qHb4TrEiz3S4+quvvVQ9VWvj2Mx6pETGb9Q@mail.gmail.com
Cc: Dmitry Vyukov <dvyukov@google.com>
Linus Torvalds [Wed, 14 Sep 2016 16:35:05 +0000 (09:35 -0700)]
Merge branch 'uaccess-fixes' of git://git./linux/kernel/git/viro/vfs
Pull uaccess fixes from Al Viro:
"Fixes for broken uaccess primitives - mostly lack of proper zeroing
in copy_from_user()/get_user()/__get_user(), but for several
architectures there's more (broken clear_user() on frv and
strncpy_from_user() on hexagon)"
* 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (28 commits)
avr32: fix copy_from_user()
microblaze: fix __get_user()
microblaze: fix copy_from_user()
m32r: fix __get_user()
blackfin: fix copy_from_user()
sparc32: fix copy_from_user()
sh: fix copy_from_user()
sh64: failing __get_user() should zero
score: fix copy_from_user() and friends
score: fix __get_user/get_user
s390: get_user() should zero on failure
ppc32: fix copy_from_user()
parisc: fix copy_from_user()
openrisc: fix copy_from_user()
nios2: fix __get_user()
nios2: copy_from_user() should zero the tail of destination
mn10300: copy_from_user() should zero on access_ok() failure...
mn10300: failing __get_user() and get_user() should zero
mips: copy_from_user() must zero the destination on access_ok() failure
ARC: uaccess: get_user to zero out dest in cause of fault
...
Linus Torvalds [Wed, 14 Sep 2016 15:42:51 +0000 (08:42 -0700)]
Merge tag 'for-linus-4.8b-rc6-tag' of git://git./linux/kernel/git/xen/tip
Pull xen regression fix from David Vrabel:
"Fix SMP boot in arm guests"
* tag 'for-linus-4.8b-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
arm/xen: fix SMP guests boot
Vitaly Kuznetsov [Thu, 8 Sep 2016 09:48:28 +0000 (11:48 +0200)]
arm/xen: fix SMP guests boot
Commit
88e957d6e47f ("xen: introduce xen_vcpu_id mapping") broke SMP
ARM guests on Xen. When FIFO-based event channels are in use (this is
the default), evtchn_fifo_alloc_control_block() is called on
CPU_UP_PREPARE event and this happens before we set up xen_vcpu_id
mapping in xen_starting_cpu. Temporary fix the issue by setting direct
Linux CPU id <-> Xen vCPU id mapping for all possible CPUs at boot. We
don't currently support kexec/kdump on Xen/ARM so these ids always
match.
In future, we have several ways to solve the issue, e.g.:
- Eliminate all hypercalls from CPU_UP_PREPARE, do them from the
starting CPU. This can probably be done for both x86 and ARM and, if
done, will allow us to get Xen's idea of vCPU id from CPUID/MPIDR on
the starting CPU directly, no messing with ACPI/device tree
required.
- Save vCPU id information from ACPI/device tree on ARM and use it to
initialize xen_vcpu_id mapping. This is the same trick we currently
do on x86.
Reported-by: Julien Grall <julien.grall@arm.com>
Tested-by: Wei Chen <Wei.Chen@arm.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Al Viro [Fri, 9 Sep 2016 23:28:23 +0000 (19:28 -0400)]
avr32: fix copy_from_user()
really ugly, but apparently avr32 compilers turns access_ok() into
something so bad that they want it in assembler. Left that way,
zeroing added in inline wrapper.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 9 Sep 2016 23:23:33 +0000 (19:23 -0400)]
microblaze: fix __get_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 9 Sep 2016 23:22:34 +0000 (19:22 -0400)]
microblaze: fix copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 9 Sep 2016 23:20:13 +0000 (19:20 -0400)]
m32r: fix __get_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 9 Sep 2016 23:16:58 +0000 (19:16 -0400)]
blackfin: fix copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 04:23:07 +0000 (00:23 -0400)]
sparc32: fix copy_from_user()
Cc: stable@vger.kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 03:39:47 +0000 (23:39 -0400)]
sh: fix copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 03:33:47 +0000 (23:33 -0400)]
sh64: failing __get_user() should zero
It could be done in exception-handling bits in __get_user_b() et.al.,
but the surgery involved would take more knowledge of sh64 details
than I have or _want_ to have.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 02:30:44 +0000 (22:30 -0400)]
score: fix copy_from_user() and friends
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 02:13:39 +0000 (22:13 -0400)]
score: fix __get_user/get_user
* should zero on any failure
* __get_user() should use __copy_from_user(), not copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Aug 2016 02:00:54 +0000 (22:00 -0400)]
s390: get_user() should zero on failure
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Aug 2016 23:16:26 +0000 (19:16 -0400)]
ppc32: fix copy_from_user()
should clear on access_ok() failures. Also remove the useless
range truncation logics.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 23:03:37 +0000 (19:03 -0400)]
parisc: fix copy_from_user()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 21:05:21 +0000 (17:05 -0400)]
openrisc: fix copy_from_user()
... that should zero on faults. Also remove the <censored> helpful
logics wrt range truncation copied from ppc32. Where it had ever
been needed only in case of copy_from_user() *and* had not been merged
into the mainline until a month after the need had disappeared.
A decade before openrisc went into mainline, I might add...
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 20:39:01 +0000 (16:39 -0400)]
nios2: fix __get_user()
a) should not leave crap on fault
b) should _not_ require access_ok() in any cases.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 20:36:36 +0000 (16:36 -0400)]
nios2: copy_from_user() should zero the tail of destination
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 20:33:10 +0000 (16:33 -0400)]
mn10300: copy_from_user() should zero on access_ok() failure...
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 20:32:02 +0000 (16:32 -0400)]
mn10300: failing __get_user() and get_user() should zero
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 20 Aug 2016 20:18:53 +0000 (16:18 -0400)]
mips: copy_from_user() must zero the destination on access_ok() failure
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Vineet Gupta [Fri, 19 Aug 2016 19:10:02 +0000 (12:10 -0700)]
ARC: uaccess: get_user to zero out dest in cause of fault
Al reported potential issue with ARC get_user() as it wasn't clearing
out destination pointer in case of fault due to bad address etc.
Verified using following
| {
| u32 bogus1 = 0xdeadbeef;
| u64 bogus2 = 0xdead;
| int rc1, rc2;
|
| pr_info("Orig values %x %llx\n", bogus1, bogus2);
| rc1 = get_user(bogus1, (u32 __user *)0x40000000);
| rc2 = get_user(bogus2, (u64 __user *)0x50000000);
| pr_info("access %d %d, new values %x %llx\n",
| rc1, rc2, bogus1, bogus2);
| }
| [ARCLinux]# insmod /mnt/kernel-module/qtn.ko
| Orig values
deadbeef dead
| access -14 -14, new values 0 0
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 19 Aug 2016 02:08:20 +0000 (22:08 -0400)]
metag: copy_from_user() should zero the destination on access_ok() failure
Cc: stable@vger.kernel.org
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 19 Aug 2016 01:31:41 +0000 (21:31 -0400)]
ia64: copy_from_user() should zero the destination on access_ok() failure
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 19 Aug 2016 01:16:49 +0000 (21:16 -0400)]
hexagon: fix strncpy_from_user() error return
It's -EFAULT, not -1 (and contrary to the comment in there,
__strnlen_user() can return 0 - on faults).
Cc: stable@vger.kernel.org
Acked-by: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 19 Aug 2016 00:54:02 +0000 (20:54 -0400)]
frv: fix clear_user()
It should check access_ok(). Otherwise a bunch of places turn into
trivially exploitable rootholes.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 18 Aug 2016 23:34:00 +0000 (19:34 -0400)]
cris: buggered copy_from_user/copy_to_user/clear_user
* copy_from_user() on access_ok() failure ought to zero the destination
* none of those primitives should skip the access_ok() check in case of
small constant size.
Cc: stable@vger.kernel.org
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 18 Aug 2016 03:19:01 +0000 (23:19 -0400)]
asm-generic: make get_user() clear the destination on errors
both for access_ok() failures and for faults halfway through
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Tue, 13 Sep 2016 19:52:45 +0000 (12:52 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Three fixes:
- AMD microcode loading fix with randomization
- an lguest tooling fix
- and an APIC enumeration boundary condition fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic: Fix num_processors value in case of failure
tools/lguest: Don't bork the terminal in case of wrong args
x86/microcode/AMD: Fix load of builtin microcode with randomized memory
Linus Torvalds [Tue, 13 Sep 2016 19:49:40 +0000 (12:49 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"A try_to_wake_up() memory ordering race fix causing a busy-loop in
ttwu()"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Fix a race between try_to_wake_up() and a woken up task
Linus Torvalds [Tue, 13 Sep 2016 19:47:29 +0000 (12:47 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"This contains:
- a set of fixes found by directed-random perf fuzzing efforts by
Vince Weaver, Alexander Shishkin and Peter Zijlstra
- a cqm driver crash fix
- an AMD uncore driver use after free fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Fix PEBSv3 record drain
perf/x86/intel/bts: Kill a silly warning
perf/x86/intel/bts: Fix BTS PMI detection
perf/x86/intel/bts: Fix confused ordering of PMU callbacks
perf/core: Fix aux_mmap_count vs aux_refcount order
perf/core: Fix a race between mmap_close() and set_output() of AUX events
perf/x86/amd/uncore: Prevent use after free
perf/x86/intel/cqm: Check cqm/mbm enabled state in event init
perf/core: Remove WARN from perf_event_read()
Linus Torvalds [Tue, 13 Sep 2016 19:13:58 +0000 (12:13 -0700)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull locking fix from Ingo Molnar:
"Another lockless_dereference() Sparse fix"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/barriers: Don't use sizeof(void) in lockless_dereference()
Linus Torvalds [Tue, 13 Sep 2016 19:02:00 +0000 (12:02 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"This contains a Xen fix, an arm64 fix and a race condition /
robustization set of fixes related to ExitBootServices() usage and
boundary conditions"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Use efi_exit_boot_services()
efi/libstub: Use efi_exit_boot_services() in FDT
efi/libstub: Introduce ExitBootServices helper
efi/libstub: Allocate headspace in efi_get_memory_map()
efi: Fix handling error value in fdt_find_uefi_params
efi: Make for_each_efi_memory_desc_in_map() cope with running on Xen
Linus Torvalds [Tue, 13 Sep 2016 18:19:52 +0000 (11:19 -0700)]
Merge tag 'md/4.8-rc6' of git://git./linux/kernel/git/shli/md
Pull MD fixes from Shaohua Li:
"A few bug fixes for MD:
- Guoqing fixed a bug compiling md-cluster in kernel
- I fixed a potential deadlock in raid5-cache superblock write, a
hang in raid5 reshape resume and a race condition introduced in
rc4"
* tag 'md/4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
raid5: fix a small race condition
md-cluster: make md-cluster also can work when compiled into kernel
raid5: guarantee enough stripes to avoid reshape hang
raid5-cache: fix a deadlock in superblock write
Linus Torvalds [Tue, 13 Sep 2016 18:10:49 +0000 (11:10 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6
Pull crypto bugfix from Herbert Xu:
"Fix a bug in the cryptd code that may lead to crashes"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: cryptd - initialize child shash_desc on import
Linus Torvalds [Mon, 12 Sep 2016 21:49:21 +0000 (14:49 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git./linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"Some small fixes for the new sunxi clk driver introduced this merge
window"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: sunxi-ng: Fix wrong reset register offsets
clk: sunxi-ng: nk: Make ccu_nk_find_best static
clk: sunxi-ng: Fix inverted test condition in ccu_helper_wait_for_lock
clk: sunxi: Fix return value check in sun8i_a23_mbus_setup()
clk: sunxi: pll2: Fix return value check in sun4i_pll2_setup()
Linus Torvalds [Mon, 12 Sep 2016 21:30:14 +0000 (14:30 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
- s390: nested virt fixes (new 4.8 feature)
- x86: fixes for 4.8 regressions
- ARM: two small bugfixes
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm-arm: Unmap shadow pagetables properly
x86, clock: Fix kvm guest tsc initialization
arm: KVM: Fix idmap overlap detection when the kernel is idmap'ed
KVM: lapic: adjust preemption timer correctly when goes TSC backward
KVM: s390: vsie: fix riccbd
KVM: s390: don't use current->thread.fpu.* when accessing registers
Linus Torvalds [Mon, 12 Sep 2016 21:13:45 +0000 (14:13 -0700)]
Merge tag 'nfs-for-4.8-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Highlights include:
Stable patches:
- We must serialise LAYOUTGET and LAYOUTRETURN to ensure correct
state accounting
- Fix the CREATE_SESSION slot number
Bugfixes:
- sunrpc: fix a UDP memory accounting regression
- NFS: Fix an error reporting regression in nfs_file_write()
- pNFS: Fix further layout stateid issues
- RPC/rdma: Revert
3d4cf35bd4fa ("xprtrdma: Reply buffer
exhaustion...")
- RPC/rdma: Fix receive buffer accounting"
* tag 'nfs-for-4.8-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4.1: Fix the CREATE_SESSION slot number accounting
xprtrdma: Fix receive buffer accounting
xprtrdma: Revert
3d4cf35bd4fa ("xprtrdma: Reply buffer exhaustion...")
pNFS: Don't forget the layout stateid if there are outstanding LAYOUTGETs
pNFS: Clear out all layout segments if the server unsets lrp->res.lrs_present
pNFS: Fix pnfs_set_layout_stateid() to clear NFS_LAYOUT_INVALID_STID
pNFS: Ensure LAYOUTGET and LAYOUTRETURN are properly serialised
NFS: Fix error reporting in nfs_file_write()
sunrpc: fix UDP memory accounting
Linus Torvalds [Mon, 12 Sep 2016 14:56:06 +0000 (07:56 -0700)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
"Mostly small sets of driver fixes scattered all over the place.
1) Mediatek driver fixes from Sean Wang. Forward port not written
correctly during TX map, missed handling of EPROBE_DEFER, and
mistaken use of put_page() instead of skb_free_frag().
2) Fix socket double-free in KCM code, from WANG Cong.
3) QED driver fixes from Sudarsana Reddy Kalluru, including a fix for
using the dcbx buffers before initializing them.
4) Mellanox Switch driver fixes from Jiri Pirko, including a fix for
double fib removals and an error handling fix in
mlxsw_sp_module_init().
5) Fix kernel panic when enabling LLDP in i40e driver, from Dave
Ertman.
6) Fix padding of TSO packets in thunderx driver, from Sunil Goutham.
7) TCP's rcv_wup not initialized properly when using fastopen, from
Neal Cardwell.
8) Don't use uninitialized flow keys in flow dissector, from Gao
Feng.
9) Use after free in l2tp module unload, from Sabrina Dubroca.
10) Fix interrupt registry ordering issues in smsc911x driver, from
Jeremy Linton.
11) Fix crashes in bonding having to do with enslaving and rx_handler,
from Mahesh Bandewar.
12) AF_UNIX deadlock fixes from Linus.
13) In mlx5 driver, don't read skb->xmit_mode after it might have been
freed from the TX reclaim path. From Tariq Toukan.
14) Fix a bug from 2015 in TCP Yeah where the congestion window does
not increase, from Artem Germanov.
15) Don't pad frames on receive in NFP driver, from Jakub Kicinski.
16) Fix chunk fragmenting in SCTP wrt. GSO, from Marcelo Ricardo
Leitner.
17) Fix deletion of VRF routes, from Mark Tomlinson.
18) Fix device refcount leak when DAD fails in ipv6, from Wei Yongjun"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (101 commits)
net/mlx4_en: Fix panic on xmit while port is down
net/mlx4_en: Fixes for DCBX
net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_state()
net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_all()
net: ethernet: renesas: sh_eth: add POST registers for rz
drivers: net: phy: mdio-xgene: Add hardware dependency
dwc_eth_qos: do not register semi-initialized device
sctp: identify chunks that need to be fragmented at IP level
mlxsw: spectrum: Set port type before setting its address
mlxsw: spectrum_router: Fix error path in mlxsw_sp_router_init
nfp: don't pad frames on receive
nfp: drop support for old firmware ABIs
nfp: remove linux/version.h includes
tcp: cwnd does not increase in TCP YeAH
net/mlx5e: Fix parsing of vlan packets when updating lro header
net/mlx5e: Fix global PFC counters replication
net/mlx5e: Prevent casting overflow
net/mlx5e: Move an_disable_cap bit to a new position
net/mlx5e: Fix xmit_more counter race issue
tcp: fastopen: avoid negative sk_forward_alloc
...
Linus Torvalds [Mon, 12 Sep 2016 03:02:25 +0000 (20:02 -0700)]
Linux 4.8-rc6
David S. Miller [Mon, 12 Sep 2016 02:40:26 +0000 (19:40 -0700)]
Merge branch 'mlx4-fixes'
Tariq Toukan says:
====================
mlx4 fixes
This patchset contains several bug fixes from the team to the
mlx4 Eth driver.
Series generated against net commit:
c2f57fb97da5 "drivers: net: phy: mdio-xgene: Add hardware dependency"
v2:
* excluded some cleanup patches.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Moshe Shemesh [Sun, 11 Sep 2016 07:56:20 +0000 (10:56 +0300)]
net/mlx4_en: Fix panic on xmit while port is down
When port is down, tx drop counter update is not needed.
Updating the counter in this case can cause a kernel
panic as when the port is down, ring can be NULL.
Fixes:
63a664b7e92b ("net/mlx4_en: fix tx_dropped bug")
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tariq Toukan [Sun, 11 Sep 2016 07:56:19 +0000 (10:56 +0300)]
net/mlx4_en: Fixes for DCBX
This patch adds a capability check before enabling DCBX.
In addition, it re-organizes the relevant data structures,
and fixes a typo in a define.
Fixes:
af7d51852631 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kamal Heib [Sun, 11 Sep 2016 07:56:18 +0000 (10:56 +0300)]
net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_state()
mlx4_en_dcbnl_set_state() returns u8, the return value from
mlx4_en_setup_tc() could be negative in case of failure, so fix that.
Fixes:
af7d51852631 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kamal Heib [Sun, 11 Sep 2016 07:56:17 +0000 (10:56 +0300)]
net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_all()
mlx4_en_dcbnl_set_all() returns u8, so return value can't be negative in
case of failure.
Fixes:
af7d51852631 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Rana Shahout <ranas@mellanox.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sun, 11 Sep 2016 21:41:49 +0000 (14:41 -0700)]
nvme: make NVME_RDMA depend on BLOCK
Commit
aa71987472a9 ("nvme: fabrics drivers don't need the nvme-pci
driver") removed the dependency on BLK_DEV_NVME, but the cdoe does
depend on the block layer (which used to be an implicit dependency
through BLK_DEV_NVME).
Otherwise you get various errors from the kbuild test robot random
config testing when that happens to hit a configuration with BLOCK
device support disabled.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jay Freyensee <james_p_freyensee@linux.intel.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 11 Sep 2016 21:23:48 +0000 (14:23 -0700)]
Merge tag 'staging-4.8-rc6' of git://git./linux/kernel/git/gregkh/staging
Pull IIO fixes from Greg KH:
"Here are a few small IIO fixes for 4.8-rc6.
Nothing major, full details are in the shortlog, all of these have
been in linux-next with no reported issues"
* tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
iio:core: fix IIO_VAL_FRACTIONAL sign handling
iio: ensure ret is initialized to zero before entering do loop
iio: accel: kxsd9: Fix scaling bug
iio: accel: bmc150: reset chip at init time
iio: fix pressure data output unit in hid-sensor-attributes
tools:iio:iio_generic_buffer: fix trigger-less mode
Linus Torvalds [Sun, 11 Sep 2016 21:10:29 +0000 (14:10 -0700)]
Merge tag 'usb-4.8-rc6' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB gadget, phy, and xhci fixes for 4.8-rc6.
All of these resolve minor issues that have been reported, and all
have been in linux-next with no reported issues"
* tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: chipidea: udc: fix NULL ptr dereference in isr_setup_status_phase
xhci: fix null pointer dereference in stop command timeout function
usb: dwc3: pci: fix build warning on !PM_SLEEP
usb: gadget: prevent potenial null pointer dereference on skb->len
usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
usb: phy: phy-generic: Check clk_prepare_enable() error
usb: gadget: udc: renesas-usb3: clear VBOUT bit in DRD_CON
Revert "usb: dwc3: gadget: always decrement by 1"
Trond Myklebust [Sun, 11 Sep 2016 18:50:01 +0000 (14:50 -0400)]
NFSv4.1: Fix the CREATE_SESSION slot number accounting
Ensure that we conform to the algorithm described in RFC5661, section
18.36.4 for when to bump the sequence id. In essence we do it for all
cases except when the RPC call timed out, or in case of the server returning
NFS4ERR_DELAY or NFS4ERR_STALE_CLIENTID.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Chris Brandt [Wed, 7 Sep 2016 18:57:09 +0000 (14:57 -0400)]
net: ethernet: renesas: sh_eth: add POST registers for rz
Due to a mistake in the hardware manual, the FWSLC and POST1-4 registers
were not documented and left out of the driver for RZ/A making the CAM
feature non-operational.
Additionally, when the offset values for POST1-4 are left blank, the driver
attempts to set them using an offset of 0xFFFF which can cause a memory
corruption or panic.
This patch fixes the panic and properly enables CAM.
Reported-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 10 Sep 2016 16:58:52 +0000 (09:58 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"nvdimm fixes for v4.8, two of them are tagged for -stable:
- Fix devm_memremap_pages() to use track_pfn_insert(). Otherwise,
DAX pmd mappings end up with an uncached pgprot, and unusable
performance for the device-dax interface. The device-dax interface
appeared in 4.7 so this is tagged for -stable.
- Fix a couple VM_BUG_ON() checks in the show_smaps() path to
understand DAX pmd entries. This fix is tagged for -stable.
- Fix a mis-merge of the nfit machine-check handler to flip the
polarity of an if() to match the final version of the patch that
Vishal sent for 4.8-rc1. Without this the nfit machine check
handler never detects / inserts new 'badblocks' entries which
applications use to identify lost portions of files.
- For test purposes, fix the nvdimm_clear_poison() path to operate on
legacy / simulated nvdimm memory ranges. Without this fix a test
can set badblocks, but never clear them on these ranges.
- Fix the range checking done by dax_dev_pmd_fault(). This is not
tagged for -stable since this problem is mitigated by specifying
aligned resources at device-dax setup time.
These patches have appeared in a next release over the past week. The
recent rebase you can see in the timestamps was to drop an invalid fix
as identified by the updated device-dax unit tests [1]. The -mm
touches have an ack from Andrew"
[1]: "[ndctl PATCH 0/3] device-dax test for recent kernel bugs"
https://lists.01.org/pipermail/linux-nvdimm/2016-September/006855.html
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm: allow legacy (e820) pmem region to clear bad blocks
nfit, mce: Fix SPA matching logic in MCE handler
mm: fix cache mode of dax pmd mappings
mm: fix show_smap() for zone_device-pmd ranges
dax: fix mapping size check
Linus Torvalds [Sat, 10 Sep 2016 16:43:10 +0000 (09:43 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Mostly driver bugfixes, but also a few cleanups which are nice to have
out of the way"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rk3x: Restore clock settings at resume time
i2c: Spelling s/acknowedge/acknowledge/
i2c: designware: save the preset value of DW_IC_SDA_HOLD
Documentation: i2c: slave-interface: add note for driver development
i2c: mux: demux-pinctrl: run properly with multiple instances
i2c: bcm-kona: fix inconsistent indenting
i2c: rcar: use proper device with dma_mapping_error
i2c: sh_mobile: use proper device with dma_mapping_error
i2c: mux: demux-pinctrl: invalidate properly when switching fails
Linus Torvalds [Sat, 10 Sep 2016 16:18:33 +0000 (09:18 -0700)]
Merge tag 'for_linus_stable' of git://git./linux/kernel/git/tytso/ext4
Pull fscrypto fixes fromTed Ts'o:
"Fix some brown-paper-bag bugs for fscrypto, including one one which
allows a malicious user to set an encryption policy on an empty
directory which they do not own"
* tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
fscrypto: require write access to mount to set encryption policy
fscrypto: only allow setting encryption policy on directories
fscrypto: add authorization check for setting encryption policy
Peter Zijlstra [Wed, 7 Sep 2016 12:42:55 +0000 (14:42 +0200)]
perf/x86/intel: Fix PEBSv3 record drain
Alexander hit the WARN_ON_ONCE(!event) on his Skylake while running
the perf fuzzer.
This means the PEBSv3 record included a status bit for an inactive
event, something that _should_ not happen.
Move the code that filters the status bits against our known PEBS
events up a spot to guarantee we only deal with events we know about.
Further add "continue" statements to the WARN_ON_ONCE()s such that
we'll not die nor generate silly events in case we ever do hit them
again.
Reported-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vince@deater.net>
Cc: stable@vger.kernel.org
Fixes:
a3d86542de88 ("perf/x86/intel/pebs: Add PEBSv3 decoding")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Alexander Shishkin [Tue, 6 Sep 2016 13:23:53 +0000 (16:23 +0300)]
perf/x86/intel/bts: Kill a silly warning
At the moment, intel_bts will WARN() out if there is more than one
event writing to the same ring buffer, via SET_OUTPUT, and will only
send data from one event to a buffer.
There is no reason to have this warning in, so kill it.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-6-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Alexander Shishkin [Tue, 6 Sep 2016 13:23:52 +0000 (16:23 +0300)]
perf/x86/intel/bts: Fix BTS PMI detection
Since BTS doesn't have a dedicated PMI status bit, the driver needs to
take extra care to check for the condition that triggers it to avoid
spurious NMI warnings.
Regardless of the local BTS context state, the only way of knowing that
the NMI is ours is to compare the write pointer against the interrupt
threshold.
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-5-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Alexander Shishkin [Tue, 6 Sep 2016 13:23:51 +0000 (16:23 +0300)]
perf/x86/intel/bts: Fix confused ordering of PMU callbacks
The intel_bts driver is using a CPU-local 'started' variable to order
callbacks and PMIs and make sure that AUX transactions don't get messed
up. However, the ordering rules in regard to this variable is a complete
mess, which recently resulted in perf_fuzzer-triggered warnings and
panics.
The general ordering rule that is patch is enforcing is that this
cpu-local variable be set only when the cpu-local AUX transaction is
active; consequently, this variable is to be checked before the AUX
related bits can be touched.
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-4-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Alexander Shishkin [Tue, 6 Sep 2016 13:23:50 +0000 (16:23 +0300)]
perf/core: Fix aux_mmap_count vs aux_refcount order
The order of accesses to ring buffer's aux_mmap_count and aux_refcount
has to be preserved across the users, namely perf_mmap_close() and
perf_aux_output_begin(), otherwise the inversion can result in the latter
holding the last reference to the aux buffer and subsequently free'ing
it in atomic context, triggering a warning.
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 257 at kernel/events/ring_buffer.c:541 __rb_free_aux+0x11a/0x130
> CPU: 0 PID: 257 Comm: stopbug Not tainted 4.8.0-rc1+ #2596
> Call Trace:
> [<
ffffffff810f3e0b>] __warn+0xcb/0xf0
> [<
ffffffff810f3f3d>] warn_slowpath_null+0x1d/0x20
> [<
ffffffff8121182a>] __rb_free_aux+0x11a/0x130
> [<
ffffffff812127a8>] rb_free_aux+0x18/0x20
> [<
ffffffff81212913>] perf_aux_output_begin+0x163/0x1e0
> [<
ffffffff8100c33a>] bts_event_start+0x3a/0xd0
> [<
ffffffff8100c42d>] bts_event_add+0x5d/0x80
> [<
ffffffff81203646>] event_sched_in.isra.104+0xf6/0x2f0
> [<
ffffffff8120652e>] group_sched_in+0x6e/0x190
> [<
ffffffff8120694e>] ctx_sched_in+0x2fe/0x5f0
> [<
ffffffff81206ca0>] perf_event_sched_in+0x60/0x80
> [<
ffffffff81206d1b>] ctx_resched+0x5b/0x90
> [<
ffffffff81207281>] __perf_event_enable+0x1e1/0x240
> [<
ffffffff81200639>] event_function+0xa9/0x180
> [<
ffffffff81202000>] ? perf_cgroup_attach+0x70/0x70
> [<
ffffffff8120203f>] remote_function+0x3f/0x50
> [<
ffffffff811971f3>] flush_smp_call_function_queue+0x83/0x150
> [<
ffffffff81197bd3>] generic_smp_call_function_single_interrupt+0x13/0x60
> [<
ffffffff810a6477>] smp_call_function_single_interrupt+0x27/0x40
> [<
ffffffff81a26ea9>] call_function_single_interrupt+0x89/0x90
> [<
ffffffff81120056>] finish_task_switch+0xa6/0x210
> [<
ffffffff81120017>] ? finish_task_switch+0x67/0x210
> [<
ffffffff81a1e83d>] __schedule+0x3dd/0xb50
> [<
ffffffff81a1efe5>] schedule+0x35/0x80
> [<
ffffffff81128031>] sys_sched_yield+0x61/0x70
> [<
ffffffff81a25be5>] entry_SYSCALL_64_fastpath+0x18/0xa8
> ---[ end trace
6235f556f5ea83a9 ]---
This patch puts the checks in perf_aux_output_begin() in the same order
as that of perf_mmap_close().
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-3-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Alexander Shishkin [Tue, 6 Sep 2016 13:23:49 +0000 (16:23 +0300)]
perf/core: Fix a race between mmap_close() and set_output() of AUX events
In the mmap_close() path we need to stop all the AUX events that are
writing data to the AUX area that we are unmapping, before we can
safely free the pages. To determine if an event needs to be stopped,
we're comparing its ->rb against the one that's getting unmapped.
However, a SET_OUTPUT ioctl may turn up inside an AUX transaction
and swizzle event::rb to some other ring buffer, but the transaction
will keep writing data to the old ring buffer until the event gets
scheduled out. At this point, mmap_close() will skip over such an
event and will proceed to free the AUX area, while it's still being
used by this event, which will set off a warning in the mmap_close()
path and cause a memory corruption.
To avoid this, always stop an AUX event before its ->rb is updated;
this will release the (potentially) last reference on the AUX area
of the buffer. If the event gets restarted, its new ring buffer will
be used. If another SET_OUTPUT comes and switches it back to the
old ring buffer that's getting unmapped, it's also fine: this
ring buffer's aux_mmap_count will be zero and AUX transactions won't
start any more.
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-2-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Eric Biggers [Thu, 8 Sep 2016 21:20:38 +0000 (14:20 -0700)]
fscrypto: require write access to mount to set encryption policy
Since setting an encryption policy requires writing metadata to the
filesystem, it should be guarded by mnt_want_write/mnt_drop_write.
Otherwise, a user could cause a write to a frozen or readonly
filesystem. This was handled correctly by f2fs but not by ext4. Make
fscrypt_process_policy() handle it rather than relying on the filesystem
to get it right.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Eric Biggers [Thu, 8 Sep 2016 18:36:39 +0000 (11:36 -0700)]
fscrypto: only allow setting encryption policy on directories
The FS_IOC_SET_ENCRYPTION_POLICY ioctl allowed setting an encryption
policy on nondirectory files. This was unintentional, and in the case
of nonempty regular files did not behave as expected because existing
data was not actually encrypted by the ioctl.
In the case of ext4, the user could also trigger filesystem errors in
->empty_dir(), e.g. due to mismatched "directory" checksums when the
kernel incorrectly tried to interpret a regular file as a directory.
This bug affected ext4 with kernels v4.8-rc1 or later and f2fs with
kernels v4.6 and later. It appears that older kernels only permitted
directories and that the check was accidentally lost during the
refactoring to share the file encryption code between ext4 and f2fs.
This patch restores the !S_ISDIR() check that was present in older
kernels.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Eric Biggers [Thu, 8 Sep 2016 17:57:08 +0000 (10:57 -0700)]
fscrypto: add authorization check for setting encryption policy
On an ext4 or f2fs filesystem with file encryption supported, a user
could set an encryption policy on any empty directory(*) to which they
had readonly access. This is obviously problematic, since such a
directory might be owned by another user and the new encryption policy
would prevent that other user from creating files in their own directory
(for example).
Fix this by requiring inode_owner_or_capable() permission to set an
encryption policy. This means that either the caller must own the file,
or the caller must have the capability CAP_FOWNER.
(*) Or also on any regular file, for f2fs v4.6 and later and ext4
v4.8-rc1 and later; a separate bug fix is coming for that.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Jean Delvare [Thu, 8 Sep 2016 14:25:15 +0000 (16:25 +0200)]
drivers: net: phy: mdio-xgene: Add hardware dependency
The mdio-xgene driver is only useful on X-Gene SoC.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Iyappan Subramanian <isubramanian@apm.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 10 Sep 2016 02:21:07 +0000 (19:21 -0700)]
Merge tag 'wireless-drivers-for-davem-2016-09-08' of git://git./linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for 4.8
iwlwifi
* fix P2P dump trigger
* prevent a potential null dereference in iwlmvm
* prevent an uninitialized value from being returned in iwlmvm
* advertise support for channel width change in AP mode
ath10k
* fix racy rx status retrieval from htt context
* QCA9887 support is not experimental anymore, remove the warning message
ath9k
* fix regression with led GPIOs
* fix AR5416 GPIO access warning
brcmfmac
* avoid potential stack overflow in brcmf_cfg80211_start_ap()
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Lars Persson [Thu, 8 Sep 2016 11:24:21 +0000 (13:24 +0200)]
dwc_eth_qos: do not register semi-initialized device
We move register_netdev() to the end of dwceqos_probe() to close any
races where the netdev callbacks are called before the initialization
has finished.
Reported-by: Pavel Andrianov <andrianov@ispras.ru>
Signed-off-by: Lars Persson <larper@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Marcelo Ricardo Leitner [Thu, 8 Sep 2016 09:54:11 +0000 (17:54 +0800)]
sctp: identify chunks that need to be fragmented at IP level
Previously, without GSO, it was easy to identify it: if the chunk didn't
fit and there was no data chunk in the packet yet, we could fragment at
IP level. So if there was an auth chunk and we were bundling a big data
chunk, it would fragment regardless of the size of the auth chunk. This
also works for the context of PMTU reductions.
But with GSO, we cannot distinguish such PMTU events anymore, as the
packet is allowed to exceed PMTU.
So we need another check: to ensure that the chunk that we are adding,
actually fits the current PMTU. If it doesn't, trigger a flush and let
it be fragmented at IP level in the next round.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dave Jiang [Fri, 9 Sep 2016 16:10:08 +0000 (09:10 -0700)]
libnvdimm: allow legacy (e820) pmem region to clear bad blocks
Bad blocks can be injected via /sys/block/pmemN/badblocks. In a situation
where legacy pmem is being used or a pmem region created by using memmap
kernel parameter, the injected bad blocks are not cleared due to
nvdimm_clear_poison() failing from lack of ndctl function pointer. In
this case we need to just return as handled and allow the bad blocks to
be cleared rather than fail.
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Vishal Verma [Fri, 2 Sep 2016 23:27:30 +0000 (17:27 -0600)]
nfit, mce: Fix SPA matching logic in MCE handler
The check for a 'pmem' type SPA in the MCE handler was inverted due to a
merge/rebase error.
Fixes: 6839a6d nfit: do an ARS scrub on hitting a latent media error
Cc: linux-acpi@vger.kernel.org
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Wed, 7 Sep 2016 15:51:21 +0000 (08:51 -0700)]
mm: fix cache mode of dax pmd mappings
track_pfn_insert() in vmf_insert_pfn_pmd() is marking dax mappings as
uncacheable rendering them impractical for application usage. DAX-pte
mappings are cached and the goal of establishing DAX-pmd mappings is to
attain more performance, not dramatically less (3 orders of magnitude).
track_pfn_insert() relies on a previous call to reserve_memtype() to
establish the expected page_cache_mode for the range. While memremap()
arranges for reserve_memtype() to be called, devm_memremap_pages() does
not. So, teach track_pfn_insert() and untrack_pfn() how to handle
tracking without a vma, and arrange for devm_memremap_pages() to
establish the write-back-cache reservation in the memtype tree.
Cc: <stable@vger.kernel.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Nilesh Choudhury <nilesh.choudhury@oracle.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Toshi Kani <toshi.kani@hpe.com>
Reported-by: Kai Zhang <kai.ka.zhang@oracle.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Sat, 3 Sep 2016 17:38:03 +0000 (10:38 -0700)]
mm: fix show_smap() for zone_device-pmd ranges
Attempting to dump /proc/<pid>/smaps for a process with pmd dax mappings
currently results in the following VM_BUG_ONs:
kernel BUG at mm/huge_memory.c:1105!
task:
ffff88045f16b140 task.stack:
ffff88045be14000
RIP: 0010:[<
ffffffff81268f9b>] [<
ffffffff81268f9b>] follow_trans_huge_pmd+0x2cb/0x340
[..]
Call Trace:
[<
ffffffff81306030>] smaps_pte_range+0xa0/0x4b0
[<
ffffffff814c2755>] ? vsnprintf+0x255/0x4c0
[<
ffffffff8123c46e>] __walk_page_range+0x1fe/0x4d0
[<
ffffffff8123c8a2>] walk_page_vma+0x62/0x80
[<
ffffffff81307656>] show_smap+0xa6/0x2b0
kernel BUG at fs/proc/task_mmu.c:585!
RIP: 0010:[<
ffffffff81306469>] [<
ffffffff81306469>] smaps_pte_range+0x499/0x4b0
Call Trace:
[<
ffffffff814c2795>] ? vsnprintf+0x255/0x4c0
[<
ffffffff8123c46e>] __walk_page_range+0x1fe/0x4d0
[<
ffffffff8123c8a2>] walk_page_vma+0x62/0x80
[<
ffffffff81307696>] show_smap+0xa6/0x2b0
These locations are sanity checking page flags that must be set for an
anonymous transparent huge page, but are not set for the zone_device
pages associated with dax mappings.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
David S. Miller [Fri, 9 Sep 2016 23:56:54 +0000 (16:56 -0700)]
Merge branch 'mlxsw-fixes'
Jiri Pirko says:
====================
mlxsw: couple of fixes
Couple of fixes from Ido and myself.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Thu, 8 Sep 2016 06:16:02 +0000 (08:16 +0200)]
mlxsw: spectrum: Set port type before setting its address
During port init, we currently set the port's type to Ethernet after
setting its MAC address. However, the hardware documentation states this
should be the other way around.
Align the driver with the hardware documentation and set the port's MAC
address after setting its type.
Fixes:
56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Thu, 8 Sep 2016 06:16:01 +0000 (08:16 +0200)]
mlxsw: spectrum_router: Fix error path in mlxsw_sp_router_init
When neigh_init fails, we have to do proper cleanup including
router_fini call.
Fixes:
6cf3c971dc84cb ("mlxsw: spectrum_router: Add private neigh table")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Al Viro [Wed, 17 Aug 2016 20:36:37 +0000 (16:36 -0400)]
asm-generic: make copy_from_user() zero the destination properly
... in all cases, including the failing access_ok()
Note that some architectures using asm-generic/uaccess.h have
__copy_from_user() not zeroing the tail on failure halfway
through. This variant works either way.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 17 Aug 2016 20:02:32 +0000 (16:02 -0400)]
alpha: fix copy_from_user()
it should clear the destination even when access_ok() fails.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Sebastian Andrzej Siewior [Fri, 9 Sep 2016 16:08:23 +0000 (18:08 +0200)]
perf/x86/amd/uncore: Prevent use after free
The resent conversion of the cpu hotplug support in the uncore driver
introduced a regression due to the way the callbacks are invoked at
initialization time.
The old code called the prepare/starting/online function on each online cpu
as a block. The new code registers the hotplug callbacks in the core for
each state. The core invokes the callbacks at each registration on all
online cpus.
The code implicitely relied on the prepare/starting/online callbacks being
called as combo on a particular cpu, which was not obvious and completely
undocumented.
The resulting subtle wreckage happens due to the way how the uncore code
manages shared data structures for cpus which share an uncore resource in
hardware. The sharing is determined in the cpu starting callback, but the
prepare callback allocates per cpu data for the upcoming cpu because
potential sharing is unknown at this point. If the starting callback finds
a online cpu which shares the hardware resource it takes a refcount on the
percpu data of that cpu and puts the own data structure into a
'free_at_online' pointer of that shared data structure. The online callback
frees that.
With the old model this worked because in a starting callback only one non
unused structure (the one of the starting cpu) was available. The new code
allocates the data structures for all cpus when the prepare callback is
registered.
Now the starting function iterates through all online cpus and looks for a
data structure (skipping its own) which has a matching hardware id. The id
member of the data structure is initialized to 0, but the hardware id can
be 0 as well. The resulting wreckage is:
CPU0 finds a matching id on CPU1, takes a refcount on CPU1 data and puts
its own data structure into CPU1s data structure to be freed.
CPU1 skips CPU0 because the data structure is its allegedly unsued own.
It finds a matching id on CPU2, takes a refcount on CPU1 data and puts
its own data structure into CPU2s data structure to be freed.
....
Now the online callbacks are invoked.
CPU0 has a pointer to CPU1s data and frees the original CPU0 data. So
far so good.
CPU1 has a pointer to CPU2s data and frees the original CPU1 data, which
is still referenced by CPU0 ---> Booom
So there are two issues to be solved here:
1) The id field must be initialized at allocation time to a value which
cannot be a valid hardware id, i.e. -1
This prevents the above scenario, but now CPU1 and CPU2 both stick their
own data structure into the free_at_online pointer of CPU0. So we leak
CPU1s data structure.
2) Fix the memory leak described in #1
Instead of having a single pointer, use a hlist to enqueue the
superflous data structures which are then freed by the first cpu
invoking the online callback.
Ideally we should know the sharing _before_ invoking the prepare callback,
but that's way beyond the scope of this bug fix.
[ tglx: Rewrote changelog ]
Fixes:
96b2bd3866a0 ("perf/x86/amd/uncore: Convert to hotplug state machine")
Reported-and-tested-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20160909160822.lowgmkdwms2dheyv@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds [Fri, 9 Sep 2016 21:52:05 +0000 (14:52 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost
Pull virtio fixes from Michael Tsirkin:
"This includes a couple of bugfixs for virtio.
The virtio console patch is actually also in x86/tip targeting 4.9
because it helps vmap stacks, but it also fixes IOMMU_PLATFORM which
was added in 4.8, and it seems important not to ship that in a broken
configuration"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_console: Stop doing DMA on the stack
virtio: mark vring_dma_dev() static
Linus Torvalds [Fri, 9 Sep 2016 21:47:41 +0000 (14:47 -0700)]
Merge tag 'pm-4.8-rc6' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"This includes a PM QoS framework fix from Tejun to prevent interrupts
from being enabled unexpectedly during early boot and a cpufreq
documentation fix.
Specifics:
- If the PM QoS framework invokes cancel_delayed_work_sync() during
early boot, it will enable interrupts which is not expected at that
point, so prevent it from happening (Tejun Heo)
- Fix cpufreq statistic documentation to follow a recent change in
behavior that forgot to update it as appropriate (Jean Delvare)"
* tag 'pm-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq-stats: Minor documentation fix
PM / QoS: avoid calling cancel_delayed_work_sync() during early boot
Rafael J. Wysocki [Fri, 9 Sep 2016 20:34:16 +0000 (22:34 +0200)]
Merge branches 'pm-core-fixes' and 'pm-cpufreq-fixes'
* pm-core-fixes:
PM / QoS: avoid calling cancel_delayed_work_sync() during early boot
* pm-cpufreq-fixes:
cpufreq-stats: Minor documentation fix
Linus Torvalds [Fri, 9 Sep 2016 20:09:50 +0000 (13:09 -0700)]
Merge tag 'gpio-v4.8-3' of git://git./linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Some GPIO fixes that have been boiling the last two weeks or so.
Nothing special, I'm trying to sort out some Kconfig business and
Russell needs a fix in for -his SA1100 rework.
Summary:
- Revert a pointless attempt to add an include to solve the UM allyes
compilation problem.
- Make the mcp23s08 depend on OF_GPIO as it uses it and doesn't
compile properly without it.
- Fix a probing problem for ucb1x00"
* tag 'gpio-v4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: sa1100: fix irq probing for ucb1x00
gpio: mcp23s08: make driver depend on OF_GPIO
Revert "gpio: include <linux/io-mapping.h> in gpiolib-of"
Linus Torvalds [Fri, 9 Sep 2016 20:00:41 +0000 (13:00 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse
Pull fuse fix from Miklos Szeredi:
"This fixes a deadlock when fuse, direct I/O and loop device are
combined"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: direct-io: don't dirty ITER_BVEC pages
Linus Torvalds [Fri, 9 Sep 2016 19:56:28 +0000 (12:56 -0700)]
Merge branch 'overlayfs-linus' of git://git./linux/kernel/git/mszeredi/vfs
Pull overlayfs fix from Miklos Szeredi:
"This fixes a regression caused by the last pull request"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix workdir creation
Linus Torvalds [Fri, 9 Sep 2016 19:52:31 +0000 (12:52 -0700)]
Merge branch 'for-linus-4.8' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"I'm not proud of how long it took me to track down that one liner in
btrfs_sync_log(), but the good news is the patches I was trying to
blame for these problems were actually fine (sorry Filipe)"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: introduce tickets_id to determine whether asynchronous metadata reclaim work makes progress
btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns
btrfs: do not decrease bytes_may_use when replaying extents
Linus Torvalds [Fri, 9 Sep 2016 19:02:46 +0000 (12:02 -0700)]
Merge tag 'sound-4.8-rc6' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"We've got quite a few fixes at this time, and all are stable patches.
syzkaller strikes back again (episode 19 or so), and we had to plug
some holes in ALSA core part (mostly timer).
In addition, a couple of FireWire audio fixes for the invalid copy
user calls in locks, and a few quirks for HD-audio and USB-audio as
usual are included"
* tag 'sound-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: rawmidi: Fix possible deadlock with virmidi registration
ALSA: timer: Fix zero-division by continue of uninitialized instance
ALSA: timer: fix NULL pointer dereference in read()/ioctl() race
ALSA: fireworks: accessing to user space outside spinlock
ALSA: firewire-tascam: accessing to user space outside spinlock
ALSA: hda - Enable subwoofer on Dell Inspiron 7559
ALSA: hda - Add headset mic quirk for Dell Inspiron 5468
ALSA: usb-audio: Add sample rate inquiry quirk for B850V3 CP2114
ALSA: timer: fix NULL pointer dereference on memory allocation failure
ALSA: timer: fix division by zero after SNDRV_TIMER_IOCTL_CONTINUE
Andy Lutomirski [Tue, 30 Aug 2016 15:04:15 +0000 (08:04 -0700)]
virtio_console: Stop doing DMA on the stack
virtio_console uses a small DMA buffer for control requests. Move
that buffer into heap memory.
Doing virtio DMA on the stack is normally okay on non-DMA-API virtio
systems (which is currently most of them), but it breaks completely
if the stack is virtually mapped.
Tested by typing both directions using picocom aimed at /dev/hvc0.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Baoyou Xie [Thu, 1 Sep 2016 11:02:57 +0000 (19:02 +0800)]
virtio: mark vring_dma_dev() static
We get 1 warning when building kernel with W=1:
drivers/virtio/virtio_ring.c:170:16: warning: no previous prototype for 'vring_dma_dev' [-Wmissing-prototypes]
In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.
Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Shaohua Li [Thu, 8 Sep 2016 17:43:58 +0000 (10:43 -0700)]
raid5: fix a small race condition
commit
5f9d1fde7d54a5(raid5: fix memory leak of bio integrity data)
moves bio_reset to bio_endio. But it introduces a small race condition.
It does bio_reset after raid5_release_stripe, which could make the
stripe reusable and hence reuse the bio just before bio_reset. Moving
bio_reset before raid5_release_stripe is called should fix the race.
Reported-and-tested-by: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Signed-off-by: Shaohua Li <shli@fb.com>
Linus Torvalds [Fri, 9 Sep 2016 17:54:29 +0000 (10:54 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- smp_mb__before_spinlock() changed to smp_mb() on arm64 since the
generic definition to smp_wmb() is not sufficient
- avoid a recursive loop with the graph tracer by using using
preempt_(enable|disable)_notrace in _percpu_(read|write)
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: use preempt_disable_notrace in _percpu_read/write
arm64: spinlocks: implement smp_mb__before_spinlock() as smp_mb()
Paolo Bonzini [Fri, 9 Sep 2016 15:45:56 +0000 (17:45 +0200)]
Merge tag 'kvm-arm-fixes-for-v4.8-round2' of git://git./linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/ARM Fixes for v4.8, round 2
Fixes an idmap issue on 32-bit KVM on ARM, and fixes a memory unmapping
issue that we've had forever.
Linus Torvalds [Fri, 9 Sep 2016 15:43:42 +0000 (08:43 -0700)]
Merge tag 'powerpc-4.8-5' of git://git./linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fixes marked for stable:
- Don't alias user region to other regions below PAGE_OFFSET from
Paul Mackerras
- Fix again csum_partial_copy_generic() on 32-bit from Christophe
Leroy
- Fix corrupted PE allocation bitmap on releasing PE from Gavin Shan
Fixes for code merged this cycle:
- Fix crash on releasing compound PE from Gavin Shan
- Fix processor numbers in OPAL ICP from Benjamin Herrenschmidt
- Fix little endian build with CONFIG_KEXEC=n from Thiago Jung
Bauermann"
* tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET
powerpc/32: Fix again csum_partial_copy_generic()
powerpc/powernv: Fix corrupted PE allocation bitmap on releasing PE
powerpc/powernv: Fix crash on releasing compound PE
powerpc/xics/opal: Fix processor numbers in OPAL ICP
powerpc/pseries: Fix little endian build with CONFIG_KEXEC=n
Linus Torvalds [Fri, 9 Sep 2016 15:32:10 +0000 (08:32 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"A few ARM fixes:
- Robin Murphy noticed that the non-secure privileged entry was
relying on undefined behaviour, which needed to be fixed.
- Vladimir Murzin noticed that prov-v7 fails to build for MMUless
configurations because a required header file wasn't included.
- A bunch of fixes for StrongARM regressions found while testing
4.8-rc on such platforms"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: sa1100: clear reset status prior to reboot
ARM: 8600/1: Enforce some NS-SVC initialisation
ARM: 8599/1: mm: pull asm/memory.h explicitly
ARM: sa1100: register clocks early
ARM: sa1100: fix 3.6864MHz clock
projects / platform / kernel / linux-rpi.git / log