Dave Airlie [Thu, 20 Apr 2017 03:19:34 +0000 (13:19 +1000)]
Merge tag 'sunxi-drm-for-4.12' of https://git./linux/kernel/git/mripard/linux into drm-next
Allwinner DRM changes for 4.12
Not any functional changes, but a lot of preliminary rework in order to
support multiple display pipelines.
* tag 'sunxi-drm-for-4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux: (26 commits)
MAINTAINERS: Add sun4i-drm git repo
drm/sun4i: Pass pointer for underlying backend into layer init
drm/sun4i: Pass pointers for associated backend and tcon into crtc init
drm/sun4i: tv: Get tcon and backend pointers from associated crtc
drm/sun4i: Use embedded tcon pointer to get the tcon's output port node
drm/sun4i: Fix tcon channel 0 comment about backporch = backporch + hsync
drm/sun4i: Fix TCON clock and regmap initialization sequence
drm/sun4i: Grab reserved memory region
drm/sun4i: Add backend and tcon pointers to sun4i_crtc
drm/sun4i: Add backend pointer to sun4i_layer
drm/sun4i: rgb: Pass tcon pointer when initializing RGB encoder
drm/sun4i: tv: Switch to drm_of_find_possible_crtcs
drm/sun4i: Drop hardcoded .possible_crtcs values from layers
drm/sun4i: Drop primary layer pointer from sun4i_drv
drm/sun4i: Initialize crtc from tcon bind function
drm/sun4i: Move layers from sun4i_drv to sun4i_crtc
drm/sun4i: Add end of list element for sun4i_layers_init's returned list
drm/sun4i: Set drm_crtc.port to the underlying TCON's output port node
drm/sun4i: Make sunxi_rgb2yuv_coef constant
drm/sun4i: Make sun4i_crtc_init return ERR_PTR style error codes
...
Dave Airlie [Wed, 19 Apr 2017 01:07:14 +0000 (11:07 +1000)]
Merge tag 'v4.11-rc7' into drm-next
Backmerge Linux 4.11-rc7 from Linus tree, to fix some
conflicts that were causing problems with the rerere cache
in drm-tip.
Linus Torvalds [Sun, 16 Apr 2017 20:00:18 +0000 (13:00 -0700)]
Linux 4.11-rc7
Linus Torvalds [Sun, 16 Apr 2017 19:38:17 +0000 (12:38 -0700)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Again, a batch that's been sitting a couple of weeks, mostly because
I anticipated a bit more material but it didn't show up -- which is
good.
These are all your garden variety fixes for ARM platforms.
The most visible issue fixed here is probably the SMP reset issue on
OMAP, the rest are minor stuff"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: allwinner: a64: add pmu0 regs for USB PHY
ARM: OMAP2+: omap_device: Sync omap_device and pm_runtime after probe defer
reset: add exported __reset_control_get, return NULL if optional
ARM: orion5x: only call into phylib when available
ARM: omap2+: Revert omap-smp.c changes resetting CPU1 during boot
ARM: dts: am335x-evmsk: adjust mmc2 param to allow suspend
ARM: dts: ti: fix PCI bus dtc warnings
ARM: dts: am335x-baltos: disable EEE for Atheros 8035 PHY
ARM: dts: OMAP3: Fix MFG ID EEPROM
ARM: sun8i: a33: add operating-points-v2 property to all nodes
ARM: sun8i: a33: remove highest OPP to fix CPU crashes
Linus Torvalds [Sun, 16 Apr 2017 19:05:09 +0000 (12:05 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Four small fixes.
Three of them fix the same error in NVMe, in loop, fc, and rdma
respectively. The last fix from Ming fixes a regression in this
series, where our bvec gap logic was wrong and causes an oops on
NVMe for certain conditions"
* 'for-linus' of git://git.kernel.dk/linux-block:
block: fix bio_will_gap() for first bvec with offset
nvme-fc: Fix sqsize wrong assignment based on ctrl MQES capability
nvme-rdma: Fix sqsize wrong assignment based on ctrl MQES capability
nvme-loop: Fix sqsize wrong assignment based on ctrl MQES capability
Olof Johansson [Sun, 16 Apr 2017 18:52:26 +0000 (11:52 -0700)]
Merge tag 'omap-for-v4.11/fixes-rc6-signed' of git://git./linux/kernel/git/tmlind/linux-omap into fixes
Regression fix for omap interconnect code for deferred probe.
Without this fix we can get PM related warnings for devices that
use deferred probe. If necessary, this fix can wait for the
v4.12 merge window no problem.
* tag 'omap-for-v4.11/fixes-rc6-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: omap_device: Sync omap_device and pm_runtime after probe defer
ARM: omap2+: Revert omap-smp.c changes resetting CPU1 during boot
ARM: dts: am335x-evmsk: adjust mmc2 param to allow suspend
ARM: dts: ti: fix PCI bus dtc warnings
ARM: dts: am335x-baltos: disable EEE for Atheros 8035 PHY
ARM: dts: OMAP3: Fix MFG ID EEPROM
Signed-off-by: Olof Johansson <olof@lixom.net>
Linus Torvalds [Sun, 16 Apr 2017 18:48:10 +0000 (11:48 -0700)]
Merge branch 'for-4.11-fixes' of git://git./linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
"Unfortunately, the commit to fix the cgroup mount race in the previous
pull request can lead to hangs.
The original bug has been around for a while and isn't too likely to
be triggered in usual use cases. Revert the commit for now"
* 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
Revert "cgroup: avoid attaching a cgroup root to two different superblocks"
Linus Torvalds [Sun, 16 Apr 2017 18:35:34 +0000 (11:35 -0700)]
Merge tag 'tty-4.11-rc7' of git://git./linux/kernel/git/gregkh/tty
Pull tty fix from Greg KH:
"Here is a single tty core revert for a patch that was reported to
cause problems.
The original issue is one that we have lived with for decades, so
trying to scramble to fix the fix in time for 4.11-final does not make
sense due to the fragility of the tty ldisc layer. Just reverting it
makes sense for now"
* tag 'tty-4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Revert "tty: don't panic on OOM in tty_set_ldisc()"
Linus Torvalds [Sun, 16 Apr 2017 17:01:34 +0000 (10:01 -0700)]
Merge tag 'trace-v4.11-rc5-2' of git://git./linux/kernel/git/rostedt/linux-trace
Pull ftrace fix from Steven Rostedt:
"While rewriting the function probe code, I stumbled over a long
standing bug. This bug has been there sinc function tracing was added
way back when. But my new development depends on this bug being fixed,
and it should be fixed regardless as it causes ftrace to disable
itself when triggered, and a reboot is required to enable it again.
The bug is that the function probe does not disable itself properly if
there's another probe of its type still enabled. For example:
# cd /sys/kernel/debug/tracing
# echo schedule:traceoff > set_ftrace_filter
# echo do_IRQ:traceoff > set_ftrace_filter
# echo \!do_IRQ:traceoff > /debug/tracing/set_ftrace_filter
# echo do_IRQ:traceoff > set_ftrace_filter
The above registers two traceoff probes (one for schedule and one for
do_IRQ, and then removes do_IRQ.
But since there still exists one for schedule, it is not done
properly. When adding do_IRQ back, the breakage in the accounting is
noticed by the ftrace self tests, and it causes a warning and disables
ftrace"
* tag 'trace-v4.11-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Fix removing of second function probe
Tejun Heo [Sun, 16 Apr 2017 14:17:37 +0000 (23:17 +0900)]
Revert "cgroup: avoid attaching a cgroup root to two different superblocks"
This reverts commit
bfb0b80db5f9dca5ac0a5fd0edb765ee555e5a8e.
Andrei reports CRIU test hangs with the patch applied. The bug fixed
by the patch isn't too likely to trigger in actual uses. Revert the
patch for now.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Link: http://lkml.kernel.org/r/20170414232737.GC20350@outlook.office365.com
Linus Torvalds [Sat, 15 Apr 2017 21:07:03 +0000 (14:07 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm
Pull nvdimm fixes from Dan Williams:
"A small crop of lockdep, sleeping while atomic, and other fixes /
band-aids in advance of the full-blown reworks targeting the next
merge window. The largest change here is "libnvdimm: fix blk free
space accounting" which deletes a pile of buggy code that better
testing would have caught before merging. The next change that is
borderline too big for a late rc is switching the device-dax locking
from rcu to srcu, I couldn't think of a smaller way to make that fix.
The __copy_user_nocache fix will have a full replacement in 4.12 to
move those pmem special case considerations into the pmem driver. The
"libnvdimm: band aid btt vs clear poison locking" commit admits that
our error clearing support for btt went in broken, so we just disable
it in 4.11 and -stable. A replacement / full fix is in the pipeline
for 4.12
Some of these would have been caught earlier had DEBUG_ATOMIC_SLEEP
been enabled on my development station. I wonder if we should have:
config DEBUG_ATOMIC_SLEEP
default PROVE_LOCKING
...since I mistakenly thought I got both with PROVE_LOCKING=y.
These have received a build success notification from the 0day robot,
and some have appeared in a -next release with no reported issues"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
x86, pmem: fix broken __copy_user_nocache cache-bypass assumptions
device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation
libnvdimm: band aid btt vs clear poison locking
libnvdimm: fix reconfig_mutex, mmap_sem, and jbd2_handle lockdep splat
libnvdimm: fix blk free space accounting
acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)
Linus Torvalds [Sat, 15 Apr 2017 16:42:14 +0000 (09:42 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is seven small fixes which are all for user visible issues that
fortunately only occur in rare circumstances.
The most serious is the sr one in which QEMU can cause us to read
beyond the end of a buffer (I don't think it's exploitable, but just
in case).
The next is the sd capacity fix which means all non 512 byte sector
drives greater than 2TB fail to be correctly sized.
The rest are either in new drivers (qedf) or on error legs"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION
scsi: aacraid: fix PCI error recovery path
scsi: sd: Fix capacity calculation with 32-bit sector_t
scsi: qla2xxx: Add fix to read correct register value for ISP82xx.
scsi: qedf: Fix crash due to unsolicited FIP VLAN response.
scsi: sr: Sanity check returned mode data
scsi: sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable
Linus Torvalds [Sat, 15 Apr 2017 16:40:35 +0000 (09:40 -0700)]
Merge branch 'parisc-4.11-4' of git://git./linux/kernel/git/deller/parisc-linux
Pull parisc fix from Helge Deller:
"Mikulas Patocka fixed a few bugs in our new pa_memcpy() assembler
function, e.g. one bug made the kernel unbootable if source and
destination address are the same"
* 'parisc-4.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: fix bugs in pa_memcpy
Martin Brandenburg [Fri, 14 Apr 2017 18:22:41 +0000 (14:22 -0400)]
orangefs: free superblock when mount fails
Otherwise lockdep says:
[ 1337.483798] ================================================
[ 1337.483999] [ BUG: lock held when returning to user space! ]
[ 1337.484252] 4.11.0-rc6 #19 Not tainted
[ 1337.484423] ------------------------------------------------
[ 1337.484626] mount/14766 is leaving the kernel with locks still held!
[ 1337.484841] 1 lock held by mount/14766:
[ 1337.485017] #0: (&type->s_umount_key#33/1){+.+.+.}, at: [<
ffffffff8124171f>] sget_userns+0x2af/0x520
Caught by xfstests generic/413 which tried to mount with the unsupported
mount option dax. Then xfstests generic/422 ran sync which deadlocks.
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Acked-by: Mike Marshall <hubcap@omnibond.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 3 Apr 2017 00:10:08 +0000 (17:10 -0700)]
vfs: don't do RCU lookup of empty pathnames
Normal pathname lookup doesn't allow empty pathnames, but using
AT_EMPTY_PATH (with name_to_handle_at() or fstatat(), for example) you
can trigger an empty pathname lookup.
And not only is the RCU lookup in that case entirely unnecessary
(because we'll obviously immediately finalize the end result), it is
actively wrong.
Why? An empth path is a special case that will return the original
'dirfd' dentry - and that dentry may not actually be RCU-free'd,
resulting in a potential use-after-free if we were to initialize the
path lazily under the RCU read lock and depend on complete_walk()
finalizing the dentry.
Found by syzkaller and KASAN.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mikulas Patocka [Fri, 14 Apr 2017 18:15:20 +0000 (14:15 -0400)]
parisc: fix bugs in pa_memcpy
The patch
554bfeceb8a22d448cd986fc9efce25e833278a1 ("parisc: Fix access
fault handling in pa_memcpy()") reimplements the pa_memcpy function.
Unfortunatelly, it makes the kernel unbootable. The crash happens in the
function ide_complete_cmd where memcpy is called with the same source
and destination address.
This patch fixes a few bugs in pa_memcpy:
* When jumping to .Lcopy_loop_16 for the first time, don't skip the
instruction "ldi 31,t0" (this bug made the kernel unbootable)
* Use the COND macro when comparing length, so that the comparison is
64-bit (a theoretical issue, in case the length is greater than
0xffffffff)
* Don't use the COND macro after the "extru" instruction (the PA-RISC
specification says that the upper 32-bits of extru result are undefined,
although they are set to zero in practice)
* Fix exception addresses in .Lcopy16_fault and .Lcopy8_fault
* Rename .Lcopy_loop_4 to .Lcopy_loop_8 (so that it is consistent with
.Lcopy8_fault)
Cc: <stable@vger.kernel.org> # v4.9+
Fixes:
554bfeceb8a2 ("parisc: Fix access fault handling in pa_memcpy()")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Linus Torvalds [Sat, 15 Apr 2017 00:51:16 +0000 (17:51 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
"Just a small update to xpad driver to recognize yet another gamepad,
and another change making sure userio.h is exported"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: xpad - add support for Razer Wildcat gamepad
uapi: add missing install of userio.h
Linus Torvalds [Sat, 15 Apr 2017 00:38:24 +0000 (17:38 -0700)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
"Things seem to be settling down as far as networking is concerned,
let's hope this trend continues...
1) Add iov_iter_revert() and use it to fix the behavior of
skb_copy_datagram_msg() et al., from Al Viro.
2) Fix the protocol used in the synthetic SKB we cons up for the
purposes of doing a simulated route lookup for RTM_GETROUTE
requests. From Florian Larysch.
3) Don't add noop_qdisc to the per-device qdisc hashes, from Cong
Wang.
4) Don't call netdev_change_features with the team lock held, from
Xin Long.
5) Revert TCP F-RTO extension to catch more spurious timeouts because
it interacts very badly with some middle-boxes. From Yuchung
Cheng.
6) Fix the loss of error values in l2tp {s,g}etsockopt calls, from
Guillaume Nault.
7) ctnetlink uses bit positions where it should be using bit masks,
fix from Liping Zhang.
8) Missing RCU locking in netfilter helper code, from Gao Feng.
9) Avoid double frees and use-after-frees in tcp_disconnect(), from
Eric Dumazet.
10) Don't do a changelink before we register the netdevice in
bridging, from Ido Schimmel.
11) Lock the ipv6 device address list properly, from Rabin Vincent"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits)
netfilter: ipt_CLUSTERIP: Fix wrong conntrack netns refcnt usage
netfilter: nft_hash: do not dump the auto generated seed
drivers: net: usb: qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201
ipv6: Fix idev->addr_list corruption
net: xdp: don't export dev_change_xdp_fd()
bridge: netlink: register netdevice before executing changelink
bridge: implement missing ndo_uninit()
bpf: reference may_access_skb() from __bpf_prog_run()
tcp: clear saved_syn in tcp_disconnect()
netfilter: nf_ct_expect: use proper RCU list traversal/update APIs
netfilter: ctnetlink: skip dumping expect when nfct_help(ct) is NULL
netfilter: make it safer during the inet6_dev->addr_list traversal
netfilter: ctnetlink: make it safer when checking the ct helper name
netfilter: helper: Add the rcu lock when call __nf_conntrack_helper_find
netfilter: ctnetlink: using bit to represent the ct event
netfilter: xt_TCPMSS: add more sanity tests on tcph->doff
net: tcp: Increase TCP_MIB_OUTRSTS even though fail to alloc skb
l2tp: don't mask errors in pppol2tp_getsockopt()
l2tp: don't mask errors in pppol2tp_setsockopt()
tcp: restrict F-RTO to work-around broken middle-boxes
...
Linus Torvalds [Sat, 15 Apr 2017 00:00:01 +0000 (17:00 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of small fixes for x86:
- fix locking in RDT to prevent memory leaks and freeing in use
memory
- prevent setting invalid values for vdso32_enabled which cause
inconsistencies for user space resulting in application crashes.
- plug a race in the vdso32 code between fork and sysctl which causes
inconsistencies for user space resulting in application crashes.
- make MPX signal delivery work in compat mode
- make the dmesg output of traps and faults readable again"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/intel_rdt: Fix locking in rdtgroup_schemata_write()
x86/debug: Fix the printk() debug output of signal_fault(), do_trap() and do_general_protection()
x86/vdso: Plug race between mapping and ELF header setup
x86/vdso: Ensure vdso32_enabled gets set to valid values only
x86/signals: Fix lower/upper bound reporting in compat siginfo
Linus Torvalds [Fri, 14 Apr 2017 23:58:38 +0000 (16:58 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"Two small fixes for perf:
- the move to support cross arch annotation introduced per arch
initialization requirements, fullfill them for s/390 (Christian
Borntraeger)
- add the missing initialization to the LBR entries to avoid exposing
random or stale data"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Avoid exposing wrong/stale data in intel_pmu_lbr_read_32()
perf annotate s390: Fix perf annotate error -95 (4.10 regression)
Linus Torvalds [Fri, 14 Apr 2017 23:57:14 +0000 (16:57 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"The irq department provides:
- two fixes for the CPU affinity spread infrastructure to prevent
unbalanced spreading in corner cases which leads to horrible
performance, because interrupts are rather aggregated than spread
- add a missing spinlock initializer in the imx-gpcv2 init code"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/irq-imx-gpcv2: Fix spinlock initialization
irq/affinity: Fix extra vecs calculation
irq/affinity: Fix CPU spread for unbalanced nodes
Linus Torvalds [Fri, 14 Apr 2017 23:55:33 +0000 (16:55 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull EFI fixes from Thomas Gleixner:
"Three fixes from EFI land:
- prevent accessing a Graphic Output Device (GOP) which the kernel
does not know to handle
- prevent PCI reconfiguration to modify a BAR which covers the
framebuffer because that's already in use through the EFI GOP
interface
- avoid reserving EFI runtime regions as this results in bogus memory
mappings"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Don't try to reserve runtime regions
efi/fb: Avoid reconfiguration of BAR that covers the framebuffer
efi/libstub: Skip GOP with PIXEL_BLT_ONLY format
Linus Torvalds [Fri, 14 Apr 2017 23:53:45 +0000 (16:53 -0700)]
Merge branch 'for-linus-4.11' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Dave Sterba collected a few more fixes for the last rc.
These aren't marked for stable, but I'm putting them in with a batch
were testing/sending by hand for this release"
* 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix potential use-after-free for cloned bio
Btrfs: fix segmentation fault when doing dio read
Btrfs: fix invalid dereference in btrfs_retry_endio
btrfs: drop the nossd flag when remounting with -o ssd
Linus Torvalds [Fri, 14 Apr 2017 23:51:29 +0000 (16:51 -0700)]
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull more CIFS fixes from Steve French:
"As promised, here is the remaining set of cifs/smb3 fixes for stable
(and a fix for one regression) now that they have had additional
review and testing"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
CIFS: Fix SMB3 mount without specifying a security mechanism
CIFS: store results of cifs_reopen_file to avoid infinite wait
CIFS: remove bad_network_name flag
CIFS: reconnect thread reschedule itself
CIFS: handle guest access errors to Windows shares
CIFS: Fix null pointer deref during read resp processing
Steven Rostedt (VMware) [Fri, 14 Apr 2017 21:45:45 +0000 (17:45 -0400)]
ftrace: Fix removing of second function probe
When two function probes are added to set_ftrace_filter, and then one of
them is removed, the update to the function locations is not performed, and
the record keeping of the function states are corrupted, and causes an
ftrace_bug() to occur.
This is easily reproducable by adding two probes, removing one, and then
adding it back again.
# cd /sys/kernel/debug/tracing
# echo schedule:traceoff > set_ftrace_filter
# echo do_IRQ:traceoff > set_ftrace_filter
# echo \!do_IRQ:traceoff > /debug/tracing/set_ftrace_filter
# echo do_IRQ:traceoff > set_ftrace_filter
Causes:
------------[ cut here ]------------
WARNING: CPU: 2 PID: 1098 at kernel/trace/ftrace.c:2369 ftrace_get_addr_curr+0x143/0x220
Modules linked in: [...]
CPU: 2 PID: 1098 Comm: bash Not tainted 4.10.0-test+ #405
Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v02.05 05/07/2012
Call Trace:
dump_stack+0x68/0x9f
__warn+0x111/0x130
? trace_irq_work_interrupt+0xa0/0xa0
warn_slowpath_null+0x1d/0x20
ftrace_get_addr_curr+0x143/0x220
? __fentry__+0x10/0x10
ftrace_replace_code+0xe3/0x4f0
? ftrace_int3_handler+0x90/0x90
? printk+0x99/0xb5
? 0xffffffff81000000
ftrace_modify_all_code+0x97/0x110
arch_ftrace_update_code+0x10/0x20
ftrace_run_update_code+0x1c/0x60
ftrace_run_modify_code.isra.48.constprop.62+0x8e/0xd0
register_ftrace_function_probe+0x4b6/0x590
? ftrace_startup+0x310/0x310
? debug_lockdep_rcu_enabled.part.4+0x1a/0x30
? update_stack_state+0x88/0x110
? ftrace_regex_write.isra.43.part.44+0x1d3/0x320
? preempt_count_sub+0x18/0xd0
? mutex_lock_nested+0x104/0x800
? ftrace_regex_write.isra.43.part.44+0x1d3/0x320
? __unwind_start+0x1c0/0x1c0
? _mutex_lock_nest_lock+0x800/0x800
ftrace_trace_probe_callback.isra.3+0xc0/0x130
? func_set_flag+0xe0/0xe0
? __lock_acquire+0x642/0x1790
? __might_fault+0x1e/0x20
? trace_get_user+0x398/0x470
? strcmp+0x35/0x60
ftrace_trace_onoff_callback+0x48/0x70
ftrace_regex_write.isra.43.part.44+0x251/0x320
? match_records+0x420/0x420
ftrace_filter_write+0x2b/0x30
__vfs_write+0xd7/0x330
? do_loop_readv_writev+0x120/0x120
? locks_remove_posix+0x90/0x2f0
? do_lock_file_wait+0x160/0x160
? __lock_is_held+0x93/0x100
? rcu_read_lock_sched_held+0x5c/0xb0
? preempt_count_sub+0x18/0xd0
? __sb_start_write+0x10a/0x230
? vfs_write+0x222/0x240
vfs_write+0xef/0x240
SyS_write+0xab/0x130
? SyS_read+0x130/0x130
? trace_hardirqs_on_caller+0x182/0x280
? trace_hardirqs_on_thunk+0x1a/0x1c
entry_SYSCALL_64_fastpath+0x18/0xad
RIP: 0033:0x7fe61c157c30
RSP: 002b:
00007ffe87890258 EFLAGS:
00000246 ORIG_RAX:
0000000000000001
RAX:
ffffffffffffffda RBX:
ffffffff8114a410 RCX:
00007fe61c157c30
RDX:
0000000000000010 RSI:
000055814798f5e0 RDI:
0000000000000001
RBP:
ffff8800c9027f98 R08:
00007fe61c422740 R09:
00007fe61ca53700
R10:
0000000000000073 R11:
0000000000000246 R12:
0000558147a36400
R13:
00007ffe8788f160 R14:
0000000000000024 R15:
00007ffe8788f15c
? trace_hardirqs_off_caller+0xc0/0x110
---[ end trace
99fa09b3d9869c2c ]---
Bad trampoline accounting at:
ffffffff81cc3b00 (do_IRQ+0x0/0x150)
Cc: stable@vger.kernel.org
Fixes:
59df055f1991 ("ftrace: trace different functions with a different tracer")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Ming Lei [Fri, 14 Apr 2017 19:58:29 +0000 (13:58 -0600)]
block: fix bio_will_gap() for first bvec with offset
Commit
729204ef49ec("block: relax check on sg gap") allows us to merge
bios, if both are physically contiguous. This change can merge a huge
number of small bios, through mkfs for example, mkfs.ntfs running time
can be decreased to ~1/10.
But if one rq starts with a non-aligned buffer (the 1st bvec's bv_offset
is non-zero) and if we allow the merge, it is quite difficult to respect
sg gap limit, especially the max segment size, or we risk having an
unaligned virtual boundary. This patch tries to avoid the issue by
disallowing a merge, if the req starts with an unaligned buffer.
Also add comments to explain why the merged segment can't end in
unaligned virt boundary.
Fixes:
729204ef49ec ("block: relax check on sg gap")
Tested-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Rewrote parts of the commit message and comments.
Signed-off-by: Jens Axboe <axboe@fb.com>
Linus Torvalds [Fri, 14 Apr 2017 16:18:17 +0000 (09:18 -0700)]
Merge tag 'fbdev-v4.11-rc6' of git://github.com/bzolnier/linux
Pull fbdev fixes from Bartlomiej Zolnierkiewicz:
- fix probing time checks in omapfb driver (regression fix)
- fix optional VBAT support in ssd1307fb driver (regression fix)
- fix connecting to backend in xen-fbfront driver
* tag 'fbdev-v4.11-rc6' of git://github.com/bzolnier/linux:
fbdev: omapfb: delete check_required_callbacks()
xen, fbfront: fix connecting to backend
fbdev/ssd1307fb: fix optional VBAT support
Linus Torvalds [Fri, 14 Apr 2017 16:16:23 +0000 (09:16 -0700)]
Merge tag 'pm-4.11-rc7' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a cpufreq core regression related to CPU online/offline and
several issues in the turbostat and cpupower utilities.
Specifics:
- Allow CPUs to be put back online even if the cpufreq driver is
unable to work with them (eg. due to missing information from
platform firmware), which was the previous behavior expected by
users, but changed in the 4.9 time frame (Chen Yu).
- Fix a few minor issues in the turbostat utility, introduced mostly
during the recent update of it (Len Brown, Doug Smythies).
- Fix a cpupower utility bug causing it to report incorrect values
for turbo frequencies in some cases (Ben Hutchings)"
* tag 'pm-4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores
cpufreq: Bring CPUs up even if cpufreq_online() failed
tools/power turbostat: update version number
tools/power turbostat: fix impossibly large CPU%c1 value
tools/power turbostat: turbostat.8 add missing column definitions
tools/power turbostat: update HWP dump to decimal from hex
tools/power turbostat: enable package THERM_INTERRUPT dump
tools/power turbostat: show missing Core and GFX power on SKL and KBL
tools/power turbostat: bugfix: GFXMHz column not changing
Linus Torvalds [Fri, 14 Apr 2017 16:05:42 +0000 (09:05 -0700)]
Merge tag 'acpi-4.11-rc7' of git://git./linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These revert a recent ACPICA commit that turned out to be problematic
and fix a device enumeration breakage from the 4.8 cycle.
Specifics:
- Revert a recent ACPICA commit targeted at catching firmware bugs
which promptly did that and caused functional problems to appear
(Rafael Wysocki).
- Fix a device enumeration problem introduced in the 4.8 time frame
which caused the ACPI docking station driver to report incorrect
status via sysfs among other things (Rafael Wysocki)"
* tag 'acpi-4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPICA: Resources: Not a valid resource if buffer length too long"
ACPI / scan: Set the visited flag for all enumerated devices
Linus Torvalds [Fri, 14 Apr 2017 15:57:20 +0000 (08:57 -0700)]
Merge tag 'devmem-v4.11-rc7' of git://git./linux/kernel/git/kees/linux
Pull CONFIG_STRICT_DEVMEM fix from Kees Cook:
"Fixes /dev/mem to read back zeros for System RAM areas in the 1MB
exception area on x86 to avoid exposing RAM or tripping hardened
usercopy"
* tag 'devmem-v4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
mm: Tighten x86 /dev/mem with zeroing reads
Linus Torvalds [Fri, 14 Apr 2017 15:49:39 +0000 (08:49 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost
Pull virtio fixes from Michael S. Tsirkin:
"virtio oops fixes
The virtio pci rework using shared interrupts caused a lot of issues.
We tried to fix them but run out of time. Revert for now, and revisit
the issue for the next kernel.
Luckily we are able to do this without loosing automatic interrupt
NUMA affinity which was the main motivator for the rework"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio-pci: Remove affinity hint before freeing the interrupt
Revert "virtio_pci: remove struct virtio_pci_vq_info"
Revert "virtio_pci: use shared interrupts for virtqueues"
Revert "virtio_pci: don't duplicate the msix_enable flag in struct pci_dev"
Revert "virtio_pci: simplify MSI-X setup"
Revert "virtio_pci: fix out of bound access for msix_names"
MAINTAINERS: fix virtio file pattern
virtio_console: fix uninitialized variable use
virtio_net: clear MTU when out of range
virtio: allow drivers to validate features
virtio_net: enable big packets for large MTU values
David S. Miller [Fri, 14 Apr 2017 14:47:13 +0000 (10:47 -0400)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for your net tree,
they are:
1) Missing TCP header sanity check in TCPMSS target, from Eric Dumazet.
2) Incorrect event message type for related conntracks created via
ctnetlink, from Liping Zhang.
3) Fix incorrect rcu locking when handling helpers from ctnetlink,
from Gao feng.
4) Fix missing rcu locking when updating helper, from Liping Zhang.
5) Fix missing read_lock_bh when iterating over list of device addresses
from TPROXY and redirect, also from Liping.
6) Fix crash when trying to dump expectations from conntrack with no
helper via ctnetlink, from Liping.
7) Missing RCU protection to expecation list update given ctnetlink
iterates over the list under rcu read lock side, from Liping too.
8) Don't dump autogenerated seed in nft_hash to userspace, this is
very confusing to the user, again from Liping.
9) Fix wrong conntrack netns module refcount in ipt_CLUSTERIP,
from Gao feng.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Aaro Koskinen [Fri, 14 Apr 2017 11:38:32 +0000 (13:38 +0200)]
fbdev: omapfb: delete check_required_callbacks()
Commit
561eb9d09a93 ("fbdev: omap/lcd: Make callbacks optional") made
panel callbacks optional but forgot to update check_required_callbacks().
As a result many (all?) OMAP systems using omapfb will crash at boot.
Fix by deleting the whole function.
Fixes:
561eb9d09a93 ("fbdev: omap/lcd: Make callbacks optional")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Rafael J. Wysocki [Fri, 14 Apr 2017 11:11:43 +0000 (13:11 +0200)]
Merge branches 'acpi-scan-fixes' and 'acpica-fixes'
* acpi-scan-fixes:
ACPI / scan: Set the visited flag for all enumerated devices
* acpica-fixes:
Revert "ACPICA: Resources: Not a valid resource if buffer length too long"
Rafael J. Wysocki [Fri, 14 Apr 2017 11:11:09 +0000 (13:11 +0200)]
Merge branches 'pm-cpufreq-fixes' and 'pm-tools-fixes'
* pm-cpufreq-fixes:
cpufreq: Bring CPUs up even if cpufreq_online() failed
* pm-tools-fixes:
cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores
tools/power turbostat: update version number
tools/power turbostat: fix impossibly large CPU%c1 value
tools/power turbostat: turbostat.8 add missing column definitions
tools/power turbostat: update HWP dump to decimal from hex
tools/power turbostat: enable package THERM_INTERRUPT dump
tools/power turbostat: show missing Core and GFX power on SKL and KBL
tools/power turbostat: bugfix: GFXMHz column not changing
Greg Kroah-Hartman [Fri, 14 Apr 2017 08:57:52 +0000 (10:57 +0200)]
Revert "tty: don't panic on OOM in tty_set_ldisc()"
This reverts commit
5362544bebe85071188dd9e479b5a5040841c895 as it is
reported to cause a reproducable crash.
Fixes:
5362544bebe8 ("tty: don't panic on OOM in tty_set_ldisc()")
Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <syzkaller@googlegroups.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Tyler Baker [Thu, 13 Apr 2017 22:27:31 +0000 (15:27 -0700)]
irqchip/irq-imx-gpcv2: Fix spinlock initialization
The raw_spinlock in the IMX GPCV2 interupt chip is not initialized before
usage. That results in a lockdep splat:
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
Add the missing raw_spin_lock_init() to the setup code.
Fixes:
e324c4dc4a59 ("irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources")
Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: shawnguo@kernel.org
Cc: andrew.smirnov@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170413222731.5917-1-tyler.baker@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Peter Zijlstra [Tue, 11 Apr 2017 08:10:28 +0000 (10:10 +0200)]
perf/x86: Avoid exposing wrong/stale data in intel_pmu_lbr_read_32()
When the perf_branch_entry::{in_tx,abort,cycles} fields were added,
intel_pmu_lbr_read_32() wasn't updated to initialize them.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: <stable@vger.kernel.org>
Fixes:
135c5612c460 ("perf/x86/intel: Support Haswell/v4 LBR format")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Fri, 14 Apr 2017 03:08:33 +0000 (20:08 -0700)]
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"11 fixes.
The presence of 'thp: reduce indentation level in change_huge_pmd()'
is unfortunate. But the patchset had been decently reviewed and tested
before we decided it was needed in -stable and I felt it best not to
churn things at the last minute"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mailmap: add Martin Kepplinger's email
zsmalloc: expand class bit
zram: do not use copy_page with non-page aligned address
zram: fix operator precedence to get offset
hugetlbfs: fix offset overflow in hugetlbfs mmap
thp: fix MADV_DONTNEED vs clear soft dirty race
thp: fix MADV_DONTNEED vs. MADV_FREE race
mm: drop unused pmdp_huge_get_and_clear_notify()
thp: fix MADV_DONTNEED vs. numa balancing race
thp: reduce indentation level in change_huge_pmd()
z3fold: fix page locking in z3fold_alloc()
Martin Kepplinger [Thu, 13 Apr 2017 21:56:43 +0000 (14:56 -0700)]
mailmap: add Martin Kepplinger's email
Set the partly deprecated companies' email addresses as alias for the
personal one.
Link: http://lkml.kernel.org/r/1491984622-17321-1-git-send-email-martin.kepplinger@ginzinger.com
Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Minchan Kim [Thu, 13 Apr 2017 21:56:40 +0000 (14:56 -0700)]
zsmalloc: expand class bit
Now 64K page system, zsamlloc has 257 classes so 8 class bit is not
enough. With that, it corrupts the system when zsmalloc stores
65536byte data(ie, index number 256) so that this patch increases class
bit for simple fix for stable backport. We should clean up this mess
soon.
index size
0 32
1 288
..
..
204 52256
256 65536
Fixes:
3783689a1 ("zsmalloc: introduce zspage structure")
Link: http://lkml.kernel.org/r/1492042622-12074-3-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Minchan Kim [Thu, 13 Apr 2017 21:56:37 +0000 (14:56 -0700)]
zram: do not use copy_page with non-page aligned address
The copy_page is optimized memcpy for page-alinged address. If it is
used with non-page aligned address, it can corrupt memory which means
system corruption. With zram, it can happen with
1. 64K architecture
2. partial IO
3. slub debug
Partial IO need to allocate a page and zram allocates it via kmalloc.
With slub debug, kmalloc(PAGE_SIZE) doesn't return page-size aligned
address. And finally, copy_page(mem, cmem) corrupts memory.
So, this patch changes it to memcpy.
Actuaully, we don't need to change zram_bvec_write part because zsmalloc
returns page-aligned address in case of PAGE_SIZE class but it's not
good to rely on the internal of zsmalloc.
Note:
When this patch is merged to stable, clear_page should be fixed, too.
Unfortunately, recent zram removes it by "same page merge" feature so
it's hard to backport this patch to -stable tree.
I will handle it when I receive the mail from stable tree maintainer to
merge this patch to backport.
Fixes: 42e99bd ("zram: optimize memory operations with clear_page()/copy_page()")
Link: http://lkml.kernel.org/r/1492042622-12074-2-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Minchan Kim [Thu, 13 Apr 2017 21:56:35 +0000 (14:56 -0700)]
zram: fix operator precedence to get offset
In zram_rw_page, the logic to get offset is wrong by operator precedence
(i.e., "<<" is higher than "&"). With wrong offset, zram can corrupt
the user's data. This patch fixes it.
Fixes:
8c7f01025 ("zram: implement rw_page operation of zram")
Link: http://lkml.kernel.org/r/1492042622-12074-1-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mike Kravetz [Thu, 13 Apr 2017 21:56:32 +0000 (14:56 -0700)]
hugetlbfs: fix offset overflow in hugetlbfs mmap
If mmap() maps a file, it can be passed an offset into the file at which
the mapping is to start. Offset could be a negative value when
represented as a loff_t. The offset plus length will be used to update
the file size (i_size) which is also a loff_t.
Validate the value of offset and offset + length to make sure they do
not overflow and appear as negative.
Found by syzcaller with commit
ff8c0c53c475 ("mm/hugetlb.c: don't call
region_abort if region_chg fails") applied. Prior to this commit, the
overflow would still occur but we would luckily return ENOMEM.
To reproduce:
mmap(0, 0x2000, 0, 0x40021, 0xffffffffffffffffULL, 0x8000000000000000ULL);
Resulted in,
kernel BUG at mm/hugetlb.c:742!
Call Trace:
hugetlbfs_evict_inode+0x80/0xa0
evict+0x24a/0x620
iput+0x48f/0x8c0
dentry_unlink_inode+0x31f/0x4d0
__dentry_kill+0x292/0x5e0
dput+0x730/0x830
__fput+0x438/0x720
____fput+0x1a/0x20
task_work_run+0xfe/0x180
exit_to_usermode_loop+0x133/0x150
syscall_return_slowpath+0x184/0x1c0
entry_SYSCALL_64_fastpath+0xab/0xad
Fixes:
ff8c0c53c475 ("mm/hugetlb.c: don't call region_abort if region_chg fails")
Link: http://lkml.kernel.org/r/1491951118-30678-1-git-send-email-mike.kravetz@oracle.com
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 13 Apr 2017 21:56:28 +0000 (14:56 -0700)]
thp: fix MADV_DONTNEED vs clear soft dirty race
Yet another instance of the same race.
Fix is identical to change_huge_pmd().
See "thp: fix MADV_DONTNEED vs. numa balancing race" for more details.
Link: http://lkml.kernel.org/r/20170302151034.27829-5-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 13 Apr 2017 21:56:26 +0000 (14:56 -0700)]
thp: fix MADV_DONTNEED vs. MADV_FREE race
Both MADV_DONTNEED and MADV_FREE handled with down_read(mmap_sem).
It's critical to not clear pmd intermittently while handling MADV_FREE
to avoid race with MADV_DONTNEED:
CPU0: CPU1:
madvise_free_huge_pmd()
pmdp_huge_get_and_clear_full()
madvise_dontneed()
zap_pmd_range()
pmd_trans_huge(*pmd) == 0 (without ptl)
// skip the pmd
set_pmd_at();
// pmd is re-established
It results in MADV_DONTNEED skipping the pmd, leaving it not cleared.
It violates MADV_DONTNEED interface and can result is userspace
misbehaviour.
Basically it's the same race as with numa balancing in
change_huge_pmd(), but a bit simpler to mitigate: we don't need to
preserve dirty/young flags here due to MADV_FREE functionality.
[kirill.shutemov@linux.intel.com: Urgh... Power is special again]
Link: http://lkml.kernel.org/r/20170303102636.bhd2zhtpds4mt62a@black.fi.intel.com
Link: http://lkml.kernel.org/r/20170302151034.27829-4-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 13 Apr 2017 21:56:23 +0000 (14:56 -0700)]
mm: drop unused pmdp_huge_get_and_clear_notify()
Dave noticed that after fixing MADV_DONTNEED vs numa balancing race the
last pmdp_huge_get_and_clear_notify() user is gone.
Let's drop the helper.
Link: http://lkml.kernel.org/r/20170306112047.24809-1-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 13 Apr 2017 21:56:20 +0000 (14:56 -0700)]
thp: fix MADV_DONTNEED vs. numa balancing race
In case prot_numa, we are under down_read(mmap_sem). It's critical to
not clear pmd intermittently to avoid race with MADV_DONTNEED which is
also under down_read(mmap_sem):
CPU0: CPU1:
change_huge_pmd(prot_numa=1)
pmdp_huge_get_and_clear_notify()
madvise_dontneed()
zap_pmd_range()
pmd_trans_huge(*pmd) == 0 (without ptl)
// skip the pmd
set_pmd_at();
// pmd is re-established
The race makes MADV_DONTNEED miss the huge pmd and don't clear it
which may break userspace.
Found by code analysis, never saw triggered.
Link: http://lkml.kernel.org/r/20170302151034.27829-3-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 13 Apr 2017 21:56:17 +0000 (14:56 -0700)]
thp: reduce indentation level in change_huge_pmd()
Patch series "thp: fix few MADV_DONTNEED races"
For MADV_DONTNEED to work properly with huge pages, it's critical to not
clear pmd intermittently unless you hold down_write(mmap_sem).
Otherwise MADV_DONTNEED can miss the THP which can lead to userspace
breakage.
See example of such race in commit message of patch 2/4.
All these races are found by code inspection. I haven't seen them
triggered. I don't think it's worth to apply them to stable@.
This patch (of 4):
Restructure code in preparation for a fix.
Link: http://lkml.kernel.org/r/20170302151034.27829-2-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Vitaly Wool [Thu, 13 Apr 2017 21:56:14 +0000 (14:56 -0700)]
z3fold: fix page locking in z3fold_alloc()
Stress testing of the current z3fold implementation on a 8-core system
revealed it was possible that a z3fold page deleted from its unbuddied
list in z3fold_alloc() would be put on another unbuddied list by
z3fold_free() while z3fold_alloc() is still processing it. This has
been introduced with commit
5a27aa822 ("z3fold: add kref refcounting")
due to the removal of special handling of a z3fold page not on any list
in z3fold_free().
To fix this, the z3fold page lock should be taken in z3fold_alloc()
before the pool lock is released. To avoid deadlocking, we just try to
lock the page as soon as we get a hold of it, and if trylock fails, we
drop this page and take the next one.
Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: <Oleksiy.Avramchenko@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jan Beulich [Thu, 13 Apr 2017 18:06:00 +0000 (11:06 -0700)]
ia64: restore symbol versions for symbols defined in assembly
The ia64 build generates many warnings like this:
WARNING: EXPORT symbol "empty_zero_page" [vmlinux] version generation failed, symbol will not be versioned.
Besides adding the necessary header this also requires fiddling with
some explicit .S -> .o rules.
Cc: IA64-ML <linux-ia64@vger.kernel.org>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Keith Busch [Thu, 13 Apr 2017 17:28:12 +0000 (13:28 -0400)]
irq/affinity: Fix extra vecs calculation
This fixes a math error calculating the extra_vecs. The error assumed
only 1 cpu per vector, but the value needs to account for the actual
number of cpus per vector in order to get the correct remainder for
extra CPU assignment.
Fixes:
7bf8222b9bd0 ("irq/affinity: Fix CPU spread for unbalanced nodes")
Reported-by: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Link: http://lkml.kernel.org/r/1492104492-19943-1-git-send-email-keith.busch@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Gao Feng [Thu, 6 Apr 2017 01:45:22 +0000 (09:45 +0800)]
netfilter: ipt_CLUSTERIP: Fix wrong conntrack netns refcnt usage
Current codes invoke wrongly nf_ct_netns_get in the destroy routine,
it should use nf_ct_netns_put, not nf_ct_netns_get.
It could cause some modules could not be unloaded.
Fixes:
ecb2421b5ddf ("netfilter: add and use nf_ct_netns_get/put")
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Liping Zhang [Mon, 3 Apr 2017 08:34:38 +0000 (16:34 +0800)]
netfilter: nft_hash: do not dump the auto generated seed
This can prevent the nft utility from printing out the auto generated
seed to the user, which is unnecessary and confusing.
Fixes:
cb1b69b0b15b ("netfilter: nf_tables: add hash expression")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Daniele Palmas [Mon, 10 Apr 2017 15:34:23 +0000 (17:34 +0200)]
drivers: net: usb: qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201
Telit LE920A4 uses the same pid 0x1201 of LE920, but modem
implementation is different, since it requires DTR to be set for
answering to qmi messages.
This patch replaces QMI_FIXED_INTF with QMI_QUIRK_SET_DTR: tests on
LE920 have been performed in order to verify backward compatibility.
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rafael J. Wysocki [Thu, 13 Apr 2017 16:14:55 +0000 (18:14 +0200)]
Revert "ACPICA: Resources: Not a valid resource if buffer length too long"
Revert commit
57707a9a7780 (ACPICA: Resources: Not a valid resource if
buffer length too long) as it is reported to prevent the TPM module
from loading on Lenovo X60 with Coreboot.
It also causes new confusing warnings to show up in the kernel log.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195311
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Torvalds [Thu, 13 Apr 2017 16:08:29 +0000 (09:08 -0700)]
Merge tag 'pinctrl-v4.11-5' of git://git./linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Two pin control fixes arriving late, these are hopefully the last pin
control fixes I send this kernel cycle. A Chromebook and an Exynos SoC
thingie.
The Exynos patch is pretty big, it is fixing unbroken a breakage
caused by yours truly when trying to figure out the merge mess with
the different Samsung platforms for this merge window. Sorry about
that. We have countered this situation by assigning a Samsung pin
control submaintainer to catch stuff earlier.
Summary:
- Make the Acer Chromebook keyboard work again with the Intel
Cherryview driver.
- Fix a merge error in the Exynos 5433 driver"
* tag 'pinctrl-v4.11-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: cherryview: Add a quirk to make Acer Chromebook keyboard work again
pinctrl: samsung: Add missing part for PINCFG_TYPE_DRV of Exynos5433
Pavel Shilovsky [Wed, 12 Apr 2017 20:32:07 +0000 (13:32 -0700)]
CIFS: Fix SMB3 mount without specifying a security mechanism
Commit
ef65aaede23f ("smb2: Enforce sec= mount option") changed the
behavior of a mount command to enforce a specified security mechanism
during mounting. On another hand according to the spec if SMB3 server
doesn't respond with a security context it implies that it supports
NTLMSSP. The current code doesn't keep it in mind and fails a mount
for such servers if no security mechanism is specified. Fix this by
indicating that a server supports NTLMSSP if a security context isn't
returned during negotiate phase. This allows the code to use NTLMSSP
by default for SMB3 mounts.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Ben Hutchings [Mon, 10 Apr 2017 23:29:44 +0000 (00:29 +0100)]
cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores
The switch that conditionally sets CPUPOWER_CAP_HAS_TURBO_RATIO and
CPUPOWER_CAP_IS_SNB flags is missing a break, so all cores get both
flags set and an assumed base clock of 100 MHz for turbo values.
Reported-by: GSR <gsr.bugs@infernal-iceberg.com>
Tested-by: GSR <gsr.bugs@infernal-iceberg.com>
References: https://bugs.debian.org/859978
Fixes:
8fb2e440b223 (cpupower: Show Intel turbo ratio support via ...)
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Thu, 13 Apr 2017 12:50:11 +0000 (14:50 +0200)]
Merge branch 'turbostat' of git://git./linux/kernel/git/lenb/linux
Pull turbostat utility fixes for v4.11 from Len Brown.
* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: update version number
tools/power turbostat: fix impossibly large CPU%c1 value
tools/power turbostat: turbostat.8 add missing column definitions
tools/power turbostat: update HWP dump to decimal from hex
tools/power turbostat: enable package THERM_INTERRUPT dump
tools/power turbostat: show missing Core and GFX power on SKL and KBL
tools/power turbostat: bugfix: GFXMHz column not changing
Linus Torvalds [Thu, 13 Apr 2017 06:36:23 +0000 (23:36 -0700)]
Merge tag 'drm-fixes-for-v4.11-rc7' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"i915, gvt, nouveau, udl and etnaviv fixes.
I was away the end of last week, so some of these would have been in
rc6, and it's Easter from tomorrow, so I decided I better dequeue what
I have now.
The nouveau changes, just add a hw enable for GP107 display (like a
pci id addition really), and fix a couple of regressions. i915 has
some more gvt fixes, along with a few run of the mill ones, the rcu
one seems like a few people have hit it.
Otherwise a small udl and small etnaviv fix"
* tag 'drm-fixes-for-v4.11-rc7' of git://people.freedesktop.org/~airlied/linux: (22 commits)
drm/etnaviv: fix missing unlock on error in etnaviv_gpu_submit()
drm/udl: Fix unaligned memory access in udl_render_hline
drm/i915: Don't call synchronize_rcu_expedited under struct_mutex
drm/i915: Suspend GuC prior to GPU Reset during GEM suspend
drm/nouveau: initial support (display-only) for GP107
drm/nouveau/kms/nv50: fix double dma_fence_put() when destroying plane state
drm/nouveau/kms/nv50: fix setting of HeadSetRasterVertBlankDmi method
drm/nouveau/mmu/nv4a: use nv04 mmu rather than the nv44 one
drm/nouveau/mpeg: mthd returns true on success now
drm/i915/gvt: set the correct default value of CTX STATUS PTR
drm/i915/gvt: Fix firmware loading interface for GVT-g golden HW state
drm/i915: Use a dummy timeline name for a signaled fence
drm/i915: Ironlake do_idle_maps w/a may be called w/o struct_mutex
drm/i915/gvt: remove the redundant info NULL check
drm/i915/gvt: adjust mem size for low resolution type
drm/i915: Avoid lock dropping between rescheduling
drm/i915/gvt: exclude cfg space from failsafe mode
drm/i915/gvt: Activate/de-activate vGPU in mdev ops.
drm/i915/execlists: Wrap tail pointer after reset tweaking
drm/i915/perf: remove user triggerable warn
...
Linus Torvalds [Thu, 13 Apr 2017 06:29:45 +0000 (23:29 -0700)]
Merge tag 'pwm/for-4.11-rc7' of git://git./linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fixes from Thierry Reding:
"This contain a fix for the atomic update support recently added to
the Rockchip driver where the clock reference count would become
unbalanced and result in the clock feeding the PWM to always be
disabled.
Another fix to the Intel LPSS driver that adds an update bit quirk
required for a specific configuration"
* tag 'pwm/for-4.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: rockchip: State of PWM clock should synchronize with PWM enabled state
pwm: lpss: Set enable-bit before waiting for update-bit to go low
pwm: lpss: Split Tangier configuration
Omar Sandoval [Wed, 12 Apr 2017 15:27:19 +0000 (16:27 +0100)]
x86/efi: Don't try to reserve runtime regions
Reserving a runtime region results in splitting the EFI memory
descriptors for the runtime region. This results in runtime region
descriptors with bogus memory mappings, leading to interesting crashes
like the following during a kexec:
general protection fault: 0000 [#1] SMP
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.0-rc1 #53
Hardware name: Wiwynn Leopard-Orv2/Leopard-DDR BW, BIOS LBM05 09/30/2016
RIP: 0010:virt_efi_set_variable()
...
Call Trace:
efi_delete_dummy_variable()
efi_enter_virtual_mode()
start_kernel()
? set_init_arg()
x86_64_start_reservations()
x86_64_start_kernel()
start_cpu()
...
Kernel panic - not syncing: Fatal exception
Runtime regions will not be freed and do not need to be reserved, so
skip the memmap modification in this case.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: <stable@vger.kernel.org> # v4.9+
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Dave Young <dyoung@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes:
8e80632fb23f ("efi/esrt: Use efi_mem_reserve() and avoid a kmalloc()")
Link: http://lkml.kernel.org/r/20170412152719.9779-2-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Rafael J. Wysocki [Mon, 10 Apr 2017 22:23:42 +0000 (00:23 +0200)]
ACPI / scan: Set the visited flag for all enumerated devices
Commit
10c7e20b2ff3 (ACPI / scan: fix enumeration (visited) flags for
bus rescans) attempted to fix a problem with ACPI-based enumerateion
of I2C/SPI devices, but it forgot to ensure that the visited flag
will be set for all of the other enumerated devices, so fix that.
Fixes:
10c7e20b2ff3 (ACPI / scan: fix enumeration (visited) flags for bus rescans)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=194885
Reported-and-tested-by: Kevin Locke <kevin@kevinlocke.name>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Chen Yu [Sun, 9 Apr 2017 05:45:16 +0000 (13:45 +0800)]
cpufreq: Bring CPUs up even if cpufreq_online() failed
There is a report that after commit
27622b061eb4 ("cpufreq: Convert
to hotplug state machine"), the normal CPU offline/online cycle
fails on some platforms.
According to the ftrace result, this problem was triggered on
platforms using acpi-cpufreq as the default cpufreq driver,
and due to the lack of some ACPI freq method (eg. _PCT),
cpufreq_online() failed and returned a negative value, so the CPU
hotplug state machine rolled back the CPU online process. Actually,
from the user's perspective, the failure of cpufreq_online() should
not prevent that CPU from being brought up, although cpufreq might
not work on that CPU.
BTW, during system startup cpufreq_online() is not invoked via CPU
online but by the cpufreq device creation process, so the APs can be
brought up even though cpufreq_online() fails in that stage.
This patch ignores the return value of cpufreq_online/offline() and
lets the cpufreq framework deal with the failure. cpufreq_online()
itself will do a proper rollback in that case and if _PCT is missing,
the ACPI cpufreq driver will print a warning if the corresponding
debug options have been enabled.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=194581
Fixes:
27622b061eb4 ("cpufreq: Convert to hotplug state machine")
Reported-and-tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.9+ <stable@vger.kernel.org> # 4.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Dave Airlie [Thu, 13 Apr 2017 00:15:45 +0000 (10:15 +1000)]
Merge tag 'drm-misc-next-fixes-2017-04-12' of git://anongit.freedesktop.org/git/drm-misc into drm-next
drm-misc-next-fixes-2017-04-12
Core changes:
- Fix off-by-one bug in get_property ioctl for enums/bitmasks (Daniel)
Driver changes:
- Add mode_fixup to dw-hdmi bridge driver to ensure mode is validated (Romain)
* tag 'drm-misc-next-fixes-2017-04-12' of git://anongit.freedesktop.org/git/drm-misc:
drm: Fix get_property logic fumble
drm: dw-hdmi: Implement the mode_fixup drm helper
Len Brown [Sat, 4 Mar 2017 22:26:29 +0000 (17:26 -0500)]
tools/power turbostat: update version number
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Wed, 12 Apr 2017 23:44:51 +0000 (19:44 -0400)]
tools/power turbostat: fix impossibly large CPU%c1 value
Most CPUs do not have a hardware c1 counter,
and so turbostat derives c1 residency:
c1 = TSC - MPERF - other_core_cstate_counters
As it is not possible to atomically read these coutners,
measurement jitter can case this calcuation to "go negative"
when very close to 0. Turbostat detect that case and
simply prints c1 = 0.00%
But that check neglected to account for systems where the TSC
crystal clock domain and the MPERF BCLK domain are differ by
a small amount. That allowed very small negative c1 numbers
to escape this check and be printed as huge positve numbers.
This code begs for a bit of cleanup, but this patch
is the minimal change to fix the issue.
Signed-off-by: Len Brown <len.brown@intel.com>
Doug Smythies [Sat, 4 Mar 2017 22:48:49 +0000 (14:48 -0800)]
tools/power turbostat: turbostat.8 add missing column definitions
Add GFX%rc6 and GFXMHz to the column descriptions section
of the turbostat man page.
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sat, 4 Mar 2017 23:18:28 +0000 (18:18 -0500)]
tools/power turbostat: update HWP dump to decimal from hex
Syntax only.
The HWP CAPABILTIES and REQUEST ratios are more easily
viewed in decimal -- just multiply by 100 and you get MHz...
new:
cpu0: MSR_HWP_CAPABILITIES: 0x010c1b23 (high 35 guar 27 eff 12 low 1)
cpu0: MSR_HWP_REQUEST: 0x80002301 (min 1 max 35 des 0 epp 0x80 window 0x0 pkg 0x0)
old:
cpu0: MSR_HWP_CAPABILITIES: 0x010c1b23 (high 0x23 guar 0x1b eff 0xc low 0x1)
cpu0: MSR_HWP_REQUEST: 0x80002301 (min 0x1 max 0x23 des 0x0 epp 0x80 window 0x0 pkg 0x0)
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sat, 4 Mar 2017 23:10:45 +0000 (18:10 -0500)]
tools/power turbostat: enable package THERM_INTERRUPT dump
cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00641400 (100 C)
cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x884b0800 (25 C)
cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C)
Enable the same per-core output, but hide it behind --debug
because it is too verbose on big systems.
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Sat, 4 Mar 2017 22:23:07 +0000 (17:23 -0500)]
tools/power turbostat: show missing Core and GFX power on SKL and KBL
While the current SDM is silent on the matter, the Core and GFX
RAPL power meters on SKL and KBL appear to work -- so show them.
Reported-by: Yaroslav Isakov <yaroslav.isakov@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Dave Airlie [Wed, 12 Apr 2017 23:56:05 +0000 (09:56 +1000)]
Merge branch 'linux-4.11' of git://github.com/skeggsb/linux into drm-fixes
GP107 modesetting support (just recognising the chipset, no other changes until 4.12)
a couple of regression fixes, one of them a rather serious double-free issue that appeared in 4.10.
* 'linux-4.11' of git://github.com/skeggsb/linux:
drm/nouveau: initial support (display-only) for GP107
drm/nouveau/kms/nv50: fix double dma_fence_put() when destroying plane state
drm/nouveau/kms/nv50: fix setting of HeadSetRasterVertBlankDmi method
drm/nouveau/mmu/nv4a: use nv04 mmu rather than the nv44 one
drm/nouveau/mpeg: mthd returns true on success now
Dave Airlie [Wed, 12 Apr 2017 23:13:04 +0000 (09:13 +1000)]
Merge tag 'drm-intel-fixes-2017-04-12' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes
drm/i915 fixes for v4.11-rc7
one rcu related fix, and a few GVT fixes.
* tag 'drm-intel-fixes-2017-04-12' of git://anongit.freedesktop.org/git/drm-intel:
drm/i915: Don't call synchronize_rcu_expedited under struct_mutex
drm/i915: Suspend GuC prior to GPU Reset during GEM suspend
drm/i915/gvt: set the correct default value of CTX STATUS PTR
drm/i915/gvt: Fix firmware loading interface for GVT-g golden HW state
drm/i915: Use a dummy timeline name for a signaled fence
drm/i915: Ironlake do_idle_maps w/a may be called w/o struct_mutex
drm/i915/gvt: remove the redundant info NULL check
drm/i915/gvt: adjust mem size for low resolution type
drm/i915: Avoid lock dropping between rescheduling
drm/i915/gvt: exclude cfg space from failsafe mode
drm/i915/gvt: Activate/de-activate vGPU in mdev ops.
drm/i915/execlists: Wrap tail pointer after reset tweaking
drm/i915/perf: remove user triggerable warn
drm/i915/perf: destroy stream on sample_flags mismatch
drm/i915: Align "unfenced" tiled access on gen2, early gen3
Dave Airlie [Wed, 12 Apr 2017 23:12:26 +0000 (09:12 +1000)]
Merge tag 'drm-misc-fixes-2017-04-11' of git://anongit.freedesktop.org/git/drm-misc into drm-fixes
drm-misc-fixes for 2017-04-11
Core changes:
- None
Driver changes
- udl: Fix unaligned memory access on SPARC (Jonathan)
* tag 'drm-misc-fixes-2017-04-11' of git://anongit.freedesktop.org/git/drm-misc:
drm/udl: Fix unaligned memory access in udl_render_hline
Dave Airlie [Wed, 12 Apr 2017 23:11:24 +0000 (09:11 +1000)]
Merge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm-fixes
Single etnaviv error path fix.
* 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux:
drm/etnaviv: fix missing unlock on error in etnaviv_gpu_submit()
Dan Williams [Thu, 6 Apr 2017 16:04:31 +0000 (09:04 -0700)]
x86, pmem: fix broken __copy_user_nocache cache-bypass assumptions
Before we rework the "pmem api" to stop abusing __copy_user_nocache()
for memcpy_to_pmem() we need to fix cases where we may strand dirty data
in the cpu cache. The problem occurs when copy_from_iter_pmem() is used
for arbitrary data transfers from userspace. There is no guarantee that
these transfers, performed by dax_iomap_actor(), will have aligned
destinations or aligned transfer lengths. Backstop the usage
__copy_user_nocache() with explicit cache management in these unaligned
cases.
Yes, copy_from_iter_pmem() is now too big for an inline, but addressing
that is saved for a later patch that moves the entirety of the "pmem
api" into the pmem driver directly.
Fixes:
5de490daec8b ("pmem: add copy_from_iter_pmem() and clear_pmem()")
Cc: <stable@vger.kernel.org>
Cc: <x86@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dan Williams [Fri, 7 Apr 2017 23:42:08 +0000 (16:42 -0700)]
device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation
The following warning triggers with a new unit test that stresses the
device-dax interface.
===============================
[ ERR: suspicious RCU usage. ]
4.11.0-rc4+ #1049 Tainted: G O
-------------------------------
./include/linux/rcupdate.h:521 Illegal context switch in RCU read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 0
2 locks held by fio/9070:
#0: (&mm->mmap_sem){++++++}, at: [<
ffffffff8d0739d7>] __do_page_fault+0x167/0x4f0
#1: (rcu_read_lock){......}, at: [<
ffffffffc03fbd02>] dax_dev_huge_fault+0x32/0x620 [dax]
Call Trace:
dump_stack+0x86/0xc3
lockdep_rcu_suspicious+0xd7/0x110
___might_sleep+0xac/0x250
__might_sleep+0x4a/0x80
__alloc_pages_nodemask+0x23a/0x360
alloc_pages_current+0xa1/0x1f0
pte_alloc_one+0x17/0x80
__pte_alloc+0x1e/0x120
__get_locked_pte+0x1bf/0x1d0
insert_pfn.isra.70+0x3a/0x100
? lookup_memtype+0xa6/0xd0
vm_insert_mixed+0x64/0x90
dax_dev_huge_fault+0x520/0x620 [dax]
? dax_dev_huge_fault+0x32/0x620 [dax]
dax_dev_fault+0x10/0x20 [dax]
__do_fault+0x1e/0x140
__handle_mm_fault+0x9af/0x10d0
handle_mm_fault+0x16d/0x370
? handle_mm_fault+0x47/0x370
__do_page_fault+0x28c/0x4f0
trace_do_page_fault+0x58/0x2a0
do_async_page_fault+0x1a/0xa0
async_page_fault+0x28/0x30
Inserting a page table entry may trigger an allocation while we are
holding a read lock to keep the device instance alive for the duration
of the fault. Use srcu for this keep-alive protection.
Fixes:
dee410792419 ("/dev/dax, core: file operations and dax-mmap")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Dave Airlie [Wed, 12 Apr 2017 20:17:40 +0000 (06:17 +1000)]
Merge tag 'drm/panel/for-4.12-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/panel: Changes for v4.12-rc1
This contains two new drivers for a Sitronix and a Samsung panel as well
as two new panels supported by the panel-simple driver.
* tag 'drm/panel/for-4.12-rc1' of git://anongit.freedesktop.org/tegra/linux:
drm/panel: simple: Add support for Winstar WF35LTIACD
devicetree: add vendor prefix for Winstar Display Corp.
drm/panel: Add driver for sitronix ST7789V LCD controller
dt-bindings: display: panel: Add bindings for the Sitronix ST7789V panel
drm/panel: Add support for S6E3HA2 panel driver on TM2 board
dt-bindings: Add support for Samsung s6e3ha2 panel binding
drm/panel: simple: Add support for Ampire AM-480272H3TMQW-T01H
dt-bindings: Add Ampire AM-480272H3TMQW-T01H panel
Kees Cook [Wed, 5 Apr 2017 16:39:08 +0000 (09:39 -0700)]
mm: Tighten x86 /dev/mem with zeroing reads
Under CONFIG_STRICT_DEVMEM, reading System RAM through /dev/mem is
disallowed. However, on x86, the first 1MB was always allowed for BIOS
and similar things, regardless of it actually being System RAM. It was
possible for heap to end up getting allocated in low 1MB RAM, and then
read by things like x86info or dd, which would trip hardened usercopy:
usercopy: kernel memory exposure attempt detected from
ffff880000090000 (dma-kmalloc-256) (4096 bytes)
This changes the x86 exception for the low 1MB by reading back zeros for
System RAM areas instead of blindly allowing them. More work is needed to
extend this to mmap, but currently mmap doesn't go through usercopy, so
hardened usercopy won't Oops the kernel.
Reported-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Tested-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Rabin Vincent [Mon, 10 Apr 2017 06:36:39 +0000 (08:36 +0200)]
ipv6: Fix idev->addr_list corruption
addrconf_ifdown() removes elements from the idev->addr_list without
holding the idev->lock.
If this happens while the loop in __ipv6_dev_get_saddr() is handling the
same element, that function ends up in an infinite loop:
NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [test:1719]
Call Trace:
ipv6_get_saddr_eval+0x13c/0x3a0
__ipv6_dev_get_saddr+0xe4/0x1f0
ipv6_dev_get_saddr+0x1b4/0x204
ip6_dst_lookup_tail+0xcc/0x27c
ip6_dst_lookup_flow+0x38/0x80
udpv6_sendmsg+0x708/0xba8
sock_sendmsg+0x18/0x30
SyS_sendto+0xb8/0xf8
syscall_common+0x34/0x58
Fixes:
6a923934c33 (Revert "ipv6: Revert optional address flusing on ifdown.")
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Vetter [Mon, 10 Apr 2017 11:54:45 +0000 (13:54 +0200)]
drm: Fix get_property logic fumble
Yet again I've proven that I can't negate conditions :(
Testcase: igt/kms_properties/get_property-sanity
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Fixes:
eb8eb02ed850 ("drm: Drop modeset_lock_all from the getproperty ioctl")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170410115445.13829-1-daniel.vetter@ffwll.ch
Wei Yongjun [Wed, 12 Apr 2017 00:31:16 +0000 (00:31 +0000)]
drm/etnaviv: fix missing unlock on error in etnaviv_gpu_submit()
Add the missing unlock before return from function etnaviv_gpu_submit()
in the error handling case.
lst: fixed label name.
Fixes:
f3cd1b064f11 ("drm/etnaviv: (re-)protect fence allocation with
GPU mutex")
CC: stable@vger.kernel.org #4.9+
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Johannes Berg [Wed, 12 Apr 2017 07:32:07 +0000 (09:32 +0200)]
net: xdp: don't export dev_change_xdp_fd()
Since dev_change_xdp_fd() is only used in rtnetlink, which must
be built-in, there's no reason to export dev_change_xdp_fd().
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
James Bottomley [Wed, 12 Apr 2017 14:29:17 +0000 (07:29 -0700)]
Merge remote-tracking branch 'mkp-scsi/4.11/scsi-fixes' into fixes
Linus Torvalds [Wed, 12 Apr 2017 07:02:33 +0000 (00:02 -0700)]
Merge branch 'stable-4.11' of git://git.infradead.org/users/pcmoore/audit
Pull audit fix from Paul Moore:
"One more small audit fix, this should be the last for v4.11.
Seth Forshee noticed a problem where the audit retry queue wasn't
being flushed properly when audit was enabled and the audit daemon
wasn't running; this patches fixes the problem (see the commit
description for more details on the change).
Both Seth and I have tested this and everything looks good"
* 'stable-4.11' of git://git.infradead.org/users/pcmoore/audit:
audit: make sure we don't let the retry queue grow without bounds
Linus Torvalds [Wed, 12 Apr 2017 06:51:58 +0000 (23:51 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending
Pull SCSI target fixes from Nicholas Bellinger:
"There has been work in a number of different areas over the last
weeks, including:
- Fix target-core-user (TCMU) back-end bi-directional handling (Xiubo
Li + Mike Christie + Ilias Tsitsimpis)
- Fix iscsi-target TMR reference leak during session shutdown (Rob
Millner + Chu Yuan Lin)
- Fix target_core_fabric_configfs.c race between LUN shutdown +
mapped LUN creation (James Shen)
- Fix target-core unknown fabric callback queue-full errors (Potnuri
Bharat Teja)
- Fix iscsi-target + iser-target queue-full handling in order to
support iw_cxgb4 RNICs. (Potnuri Bharat Teja + Sagi Grimberg)
- Fix ALUA transition state race between multiple initiator (Mike
Christie)
- Drop work-around for legacy GlobalSAN initiator, to allow QLogic
57840S + 579xx offload HBAs to work out-of-the-box in MSFT
environments. (Martin Svec + Arun Easi)
Note that a number are CC'ed for stable, and although the queue-full
bug-fixes required for iser-target to work with iw_cxgb4 aren't CC'ed
here, they'll be posted to Greg-KH separately"
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
tcmu: Skip Data-Out blocks before gathering Data-In buffer for BIDI case
iscsi-target: Drop work-around for legacy GlobalSAN initiator
target: Fix ALUA transition state race between multiple initiators
iser-target: avoid posting a recv buffer twice
iser-target: Fix queue-full response handling
iscsi-target: Propigate queue_data_in + queue_status errors
target: Fix unknown fabric callback queue-full errors
tcmu: Fix wrongly calculating of the base_command_size
tcmu: Fix possible overwrite of t_data_sg's last iov[]
target: Avoid mappedlun symlink creation during lun shutdown
iscsi-target: Fix TMR reference leak during session shutdown
usb: gadget: Correct usb EP argument for BOT status request
tcmu: Allow cmd_time_out to be set to zero (disabled)
Linus Torvalds [Wed, 12 Apr 2017 06:38:16 +0000 (23:38 -0700)]
Merge branch 'for-4.11-fixes' of git://git./linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
"This contains fixes for two long standing subtle bugs:
- kthread_bind() on a new kthread binds it to specific CPUs and
prevents userland from messing with the affinity or cgroup
membership. Unfortunately, for cgroup membership, there's a window
between kthread creation and kthread_bind*() invocation where the
kthread can be moved into a non-root cgroup by userland.
Depending on what controllers are in effect, this can assign the
kthread unexpected attributes. For example, in the reported case,
workqueue workers ended up in a non-root cpuset cgroups and had
their CPU affinities overridden. This broke workqueue invariants
and led to workqueue stalls.
Fixed by closing the window between kthread creation and
kthread_bind() as suggested by Oleg.
- There was a bug in cgroup mount path which could allow two
competing mount attempts to attach the same cgroup_root to two
different superblocks.
This was caused by mishandling return value from kernfs_pin_sb().
Fixed"
* 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: avoid attaching a cgroup root to two different superblocks
cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups
Linus Torvalds [Wed, 12 Apr 2017 06:36:46 +0000 (23:36 -0700)]
Merge branch 'for-4.11-fixes' of git://git./linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Two libata fixes.
One to disable hotplug on VT6420 which never worked properly. The
other reverts an earlier patch which disabled the second port on
SB600/700. There were some confusions due to earlier datasheets which
incorrectly indicated that the second port is not implemented on both
SB600 and 700"
* 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
sata_via: Enable hotplug only on VT6421
Revert "pata_atiixp: Don't use unconnected secondary port on SB600/SB700"
Linus Torvalds [Wed, 12 Apr 2017 06:35:14 +0000 (23:35 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid
Pull HID fixes from Jiri Kosina:
- revert of a commit that switched all Synaptics touchpads over to be
driven by hid-rmi. It turns out that this caused several user-visible
regressions, and therefore we revert back to the original state
before all the reported issues have been fixed.
- a new uclogic device ID addition, from Xiaolei Yu.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
Revert "HID: rmi: Handle all Synaptics touchpads using hid-rmi"
HID: uclogic: add support for Ugee Tablet EX07S
David S. Miller [Wed, 12 Apr 2017 02:22:45 +0000 (22:22 -0400)]
Merge branch 'bridge-register-netdev-before-changelink'
Ido Schimmel says:
====================
bridge: Fix kernel oops during bridge creation
First patch adds a missing ndo_uninit() in the bridge driver, which is a
prerequisite for the second patch that actually fixes the oops.
Please consider both patches for 4.4.y, 4.9.y and 4.10.y
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 10 Apr 2017 11:59:28 +0000 (14:59 +0300)]
bridge: netlink: register netdevice before executing changelink
Peter reported a kernel oops when executing the following command:
$ ip link add name test type bridge vlan_default_pvid 1
[13634.939408] BUG: unable to handle kernel NULL pointer dereference at
0000000000000190
[13634.939436] IP: __vlan_add+0x73/0x5f0
[...]
[13634.939783] Call Trace:
[13634.939791] ? pcpu_next_unpop+0x3b/0x50
[13634.939801] ? pcpu_alloc+0x3d2/0x680
[13634.939810] ? br_vlan_add+0x135/0x1b0
[13634.939820] ? __br_vlan_set_default_pvid.part.28+0x204/0x2b0
[13634.939834] ? br_changelink+0x120/0x4e0
[13634.939844] ? br_dev_newlink+0x50/0x70
[13634.939854] ? rtnl_newlink+0x5f5/0x8a0
[13634.939864] ? rtnl_newlink+0x176/0x8a0
[13634.939874] ? mem_cgroup_commit_charge+0x7c/0x4e0
[13634.939886] ? rtnetlink_rcv_msg+0xe1/0x220
[13634.939896] ? lookup_fast+0x52/0x370
[13634.939905] ? rtnl_newlink+0x8a0/0x8a0
[13634.939915] ? netlink_rcv_skb+0xa1/0xc0
[13634.939925] ? rtnetlink_rcv+0x24/0x30
[13634.939934] ? netlink_unicast+0x177/0x220
[13634.939944] ? netlink_sendmsg+0x2fe/0x3b0
[13634.939954] ? _copy_from_user+0x39/0x40
[13634.939964] ? sock_sendmsg+0x30/0x40
[13634.940159] ? ___sys_sendmsg+0x29d/0x2b0
[13634.940326] ? __alloc_pages_nodemask+0xdf/0x230
[13634.940478] ? mem_cgroup_commit_charge+0x7c/0x4e0
[13634.940592] ? mem_cgroup_try_charge+0x76/0x1a0
[13634.940701] ? __handle_mm_fault+0xdb9/0x10b0
[13634.940809] ? __sys_sendmsg+0x51/0x90
[13634.940917] ? entry_SYSCALL_64_fastpath+0x1e/0xad
The problem is that the bridge's VLAN group is created after setting the
default PVID, when registering the netdevice and executing its
ndo_init().
Fix this by changing the order of both operations, so that
br_changelink() is only processed after the netdevice is registered,
when the VLAN group is already initialized.
Fixes:
b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Peter V. Saveliev <peter@svinota.eu>
Tested-by: Peter V. Saveliev <peter@svinota.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 10 Apr 2017 11:59:27 +0000 (14:59 +0300)]
bridge: implement missing ndo_uninit()
While the bridge driver implements an ndo_init(), it was missing a
symmetric ndo_uninit(), causing the different de-initialization
operations to be scattered around its dellink() and destructor().
Implement a symmetric ndo_uninit() and remove the overlapping operations
from its dellink() and destructor().
This is a prerequisite for the next patch, as it allows us to have a
proper cleanup upon changelink() failure during the bridge's newlink().
Fixes:
b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Mauricio Faria de Oliveira [Tue, 11 Apr 2017 14:46:04 +0000 (11:46 -0300)]
scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION
On a dual controller setup with multipath enabled, some MEDIUM ERRORs
caused both paths to be failed, thus I/O got queued/blocked since the
'queue_if_no_path' feature is enabled by default on IPR controllers.
This example disabled 'queue_if_no_path' so the I/O failure is seen at
the sg_dd program. Notice that after the sg_dd test-case, both paths
are in 'failed' state, and both path/priority groups are in 'enabled'
state (not 'active') -- which would block I/O with 'queue_if_no_path'.
# sg_dd if=/dev/dm-2 bs=4096 count=1 dio=1 verbose=4 blk_sgio=0
<...>
read(unix): count=4096, res=-1
sg_dd: reading, skip=0 : Input/output error
<...>
# dmesg
[...] sd 2:2:16:0: [sds] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[...] sd 2:2:16:0: [sds] Sense Key : Medium Error [current]
[...] sd 2:2:16:0: [sds] Add. Sense: Unrecovered read error - recommend rewrite the data
[...] sd 2:2:16:0: [sds] CDB: Read(10) 28 00 00 00 00 00 00 00 20 00
[...] blk_update_request: I/O error, dev sds, sector 0
[...] device-mapper: multipath: Failing path 65:32.
<...>
[...] device-mapper: multipath: Failing path 65:224.
# multipath -l
1IBM_IPR-0_59C2AE0000001F80 dm-2 IBM ,IPR-0
59C2AE00
size=5.2T features='0' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=0 status=enabled
| `- 2:2:16:0 sds 65:32 failed undef running
`-+- policy='service-time 0' prio=0 status=enabled
`- 1:2:7:0 sdae 65:224 failed undef running
This is not the desired behavior. The dm-multipath explicitly checks
for the MEDIUM ERROR case (and a few others) so not to fail the path
(e.g., I/O to other sectors could potentially happen without problems).
See dm-mpath.c :: do_end_io_bio() -> noretry_error() !->! fail_path().
The problem trace is:
1) ipr_scsi_done() // SENSE KEY/CHECK CONDITION detected, go to..
2) ipr_erp_start() // ipr_is_gscsi() and masked_ioasc OK, go to..
3) ipr_gen_sense() // masked_ioasc is IPR_IOASC_MED_DO_NOT_REALLOC,
// so set DID_PASSTHROUGH.
4) scsi_decide_disposition() // check for DID_PASSTHROUGH and return
// early on, faking a DID_OK.. *instead*
// of reaching scsi_check_sense().
// Had it reached the latter, that would
// set host_byte to DID_MEDIUM_ERROR.
5) scsi_finish_command()
6) scsi_io_completion()
7) __scsi_error_from_host_byte() // That would be converted to -ENODATA
<...>
8) dm_softirq_done()
9) multipath_end_io()
10) do_end_io()
11) noretry_error() // And that is checked in dm-mpath :: noretry_error()
// which would cause fail_path() not to be called.
With this patch applied, the I/O is failed but the paths are not. This
multipath device continues accepting more I/O requests without blocking.
(and notice the different host byte/driver byte handling per SCSI layer).
# dmesg
[...] sd 2:2:7:0: [sdaf] Done: SUCCESS Result: hostbyte=0x13 driverbyte=DRIVER_OK
[...] sd 2:2:7:0: [sdaf] CDB: Read(10) 28 00 00 00 00 00 00 00 40 00
[...] sd 2:2:7:0: [sdaf] Sense Key : Medium Error [current]
[...] sd 2:2:7:0: [sdaf] Add. Sense: Unrecovered read error - recommend rewrite the data
[...] blk_update_request: critical medium error, dev sdaf, sector 0
[...] blk_update_request: critical medium error, dev dm-6, sector 0
[...] sd 2:2:7:0: [sdaf] Done: SUCCESS Result: hostbyte=0x13 driverbyte=DRIVER_OK
[...] sd 2:2:7:0: [sdaf] CDB: Read(10) 28 00 00 00 00 00 00 00 10 00
[...] sd 2:2:7:0: [sdaf] Sense Key : Medium Error [current]
[...] sd 2:2:7:0: [sdaf] Add. Sense: Unrecovered read error - recommend rewrite the data
[...] blk_update_request: critical medium error, dev sdaf, sector 0
[...] blk_update_request: critical medium error, dev dm-6, sector 0
[...] Buffer I/O error on dev dm-6, logical block 0, async page read
# multipath -l 1IBM_IPR-0_59C2AE0000001F80
1IBM_IPR-0_59C2AE0000001F80 dm-6 IBM ,IPR-0
59C2AE00
size=5.2T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=0 status=active
| `- 2:2:7:0 sdaf 65:240 active undef running
`-+- policy='service-time 0' prio=0 status=enabled
`- 1:2:7:0 sdh 8:112 active undef running
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Guilherme G. Piccoli [Thu, 6 Apr 2017 21:12:09 +0000 (18:12 -0300)]
scsi: aacraid: fix PCI error recovery path
During a PCI error recovery, if aac_check_health() is not aware that a
PCI error happened and we have an offline PCI channel, it might trigger
some errors (like NULL pointer dereference) and inhibit the error
recovery process to complete.
This patch makes the health check procedure aware of PCI channel issues,
and in case of error recovery process, the function
aac_adapter_check_health() returns -1 and let the recovery process to
complete successfully. This patch was tested on upstream kernel
v4.11-rc5 in PowerPC ppc64le architecture with adapter 9005:028d
(VID:DID) - the error recovery procedure was able to recover fine.
Fixes:
5c63f7f710bd ("aacraid: Added EEH support")
Cc: stable@vger.kernel.org # v4.6+
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Reviewed-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Ingo Molnar [Tue, 11 Apr 2017 19:41:39 +0000 (21:41 +0200)]
Merge tag 'perf-urgent-for-mingo-4.11-
20170411' of git://git./linux/kernel/git/acme/linux into perf/urgent
Pull 'perf annotate' fix for s390:
- The move to support cross arch annotation introduced per arch
initialization requirements, fullfill them for s/390 (Christian Borntraeger)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Liu Bo [Mon, 10 Apr 2017 19:36:26 +0000 (12:36 -0700)]
Btrfs: fix potential use-after-free for cloned bio
KASAN reports that there is a use-after-free case of bio in btrfs_map_bio.
If we need to submit IOs to several disks at a time, the original bio
would get cloned and mapped to the destination disk, but we really should
use the original bio instead of a cloned bio to do the sanity check
because cloned bios are likely to be freed by its endio.
Reported-by: Diego <diegocg@gmail.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Liu Bo [Fri, 7 Apr 2017 20:11:10 +0000 (13:11 -0700)]
Btrfs: fix segmentation fault when doing dio read
Commit
2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks")
introduced this bug during iterating bio pages in dio read's endio hook,
and it could end up with segment fault of the dio reading task.
So the reason is 'if (nr_sectors--)', and it makes the code assume that
there is one more block in the same page, so page offset is increased and
the bio which is created to repair the bad block then has an incorrect
bvec.bv_offset, and a later access of the page content would throw a
segmentation fault.
This also adds ASSERT to check page offset against page size.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Liu Bo [Wed, 5 Apr 2017 21:04:19 +0000 (14:04 -0700)]
Btrfs: fix invalid dereference in btrfs_retry_endio
When doing directIO repair, we have this oops:
[ 1458.532816] general protection fault: 0000 [#1] SMP
...
[ 1458.536291] Workqueue: btrfs-endio-repair btrfs_endio_repair_helper [btrfs]
[ 1458.536893] task:
ffff88082a42d100 task.stack:
ffffc90002b3c000
[ 1458.537499] RIP: 0010:btrfs_retry_endio+0x7e/0x1a0 [btrfs]
...
[ 1458.543261] Call Trace:
[ 1458.543958] ? rcu_read_lock_sched_held+0xc4/0xd0
[ 1458.544374] bio_endio+0xed/0x100
[ 1458.544750] end_workqueue_fn+0x3c/0x40 [btrfs]
[ 1458.545257] normal_work_helper+0x9f/0x900 [btrfs]
[ 1458.545762] btrfs_endio_repair_helper+0x12/0x20 [btrfs]
[ 1458.546224] process_one_work+0x34d/0xb70
[ 1458.546570] ? process_one_work+0x29e/0xb70
[ 1458.546938] worker_thread+0x1cf/0x960
[ 1458.547263] ? process_one_work+0xb70/0xb70
[ 1458.547624] kthread+0x17d/0x180
[ 1458.547909] ? kthread_create_on_node+0x70/0x70
[ 1458.548300] ret_from_fork+0x31/0x40
It turns out that btrfs_retry_endio is trying to get inode from a directIO
page.
This fixes the problem by using the saved inode pointer, done->inode.
btrfs_retry_endio_nocsum has the same problem, and it's fixed as well.
Also cleanup unused @start (which is too trivial for a separate patch).
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Adam Borowski [Fri, 31 Mar 2017 15:19:04 +0000 (17:19 +0200)]
btrfs: drop the nossd flag when remounting with -o ssd
The opposite case was already handled right in the very next switch entry.
And also when turning on nossd, drop ssd_spread.
Reported-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
projects / platform / kernel / linux-rpi.git / log