Further testing with false negatives suppressed by commit 293e2421fe
("rcu: Remove superfluous versions of rcu_read_lock_sched_held()")
identified a few more unprotected uses of RCU from the idle loop.
Because RCU actively ignores idle-loop code (for energy-efficiency
reasons, among other things), using RCU from the idle loop can result
in too-short grace periods, in turn resulting in arbitrary misbehavior.
The affected function is rpm_suspend().
The resulting lockdep-RCU splat is as follows:
------------------------------------------------------------------------
Warning from omap3
===============================
[ INFO: suspicious RCU usage. ]
4.6.0-rc5-next-20160426+ #1112 Not tainted
-------------------------------
include/trace/events/rpm.h:63 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
RCU used illegally from idle CPU!
rcu_scheduler_active = 1, debug_locks = 0
RCU used illegally from extended quiescent state!
1 lock held by swapper/0/0:
#0: (&(&dev->power.lock)->rlock){-.-...}, at: [<c052ee24>] __pm_runtime_suspend+0x54/0x84
stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.6.0-rc5-next-20160426+ #1112
Hardware name: Generic OMAP36xx (Flattened Device Tree)
[<c0110308>] (unwind_backtrace) from [<c010c3a8>] (show_stack+0x10/0x14)
[<c010c3a8>] (show_stack) from [<c047fec8>] (dump_stack+0xb0/0xe4)
[<c047fec8>] (dump_stack) from [<c052d7b4>] (rpm_suspend+0x604/0x7e4)
[<c052d7b4>] (rpm_suspend) from [<c052ee34>] (__pm_runtime_suspend+0x64/0x84)
[<c052ee34>] (__pm_runtime_suspend) from [<c04bf3bc>] (omap2_gpio_prepare_for_idle+0x5c/0x70)
[<c04bf3bc>] (omap2_gpio_prepare_for_idle) from [<c01255e8>] (omap_sram_idle+0x140/0x244)
[<c01255e8>] (omap_sram_idle) from [<c0126b48>] (omap3_enter_idle_bm+0xfc/0x1ec)
[<c0126b48>] (omap3_enter_idle_bm) from [<c0601db8>] (cpuidle_enter_state+0x80/0x3d4)
[<c0601db8>] (cpuidle_enter_state) from [<c0183c74>] (cpu_startup_entry+0x198/0x3a0)
[<c0183c74>] (cpu_startup_entry) from [<c0b00c0c>] (start_kernel+0x354/0x3c8)
[<c0b00c0c>] (start_kernel) from [<8000807c>] (0x8000807c)
------------------------------------------------------------------------
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Commit aa71987472 ("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>
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.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iFYEABECABYFAlfVHiQPHGdyZWdAa3JvYWguY29tAAoJEDFH1A3bLfspQ4YAoJEd
rJOXb3451Zq6KdCgO/1AQUMRAJ9M3umVQA6h5u403ih2NyadrNVDZg==
=Fr22
-----END PGP SIGNATURE-----
Merge tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/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
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.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iFYEABECABYFAlfVHp0PHGdyZWdAa3JvYWguY29tAAoJEDFH1A3bLfspNBAAoKm1
O+zfSBYR3OWH1Hr3xGgwgxpqAJ92PKIQRP4te/inFvTWb73heYahag==
=DUkg
-----END PGP SIGNATURE-----
Merge tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/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"
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
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
allows a malicious user to set an encryption policy on an empty
directory which they do not own.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJX05q4AAoJEPL5WVaVDYGjOywH/AyXoo4d1/5H/XTakNYPxYIW
vtBOXciHai4ZE9RygL3gdZuiyY9bTx2sc80So3KboNUdiuOJBPnuAkOQMr973UCI
yGW3eP/RYGA1XQUbtOyFvzJMIZLKXV2ytakFeRz+m1CQF2F5F7/prKQB2j4sWHff
JigAC67LlZSiz7L8SqtPG4uG1C8K/YEorf14dG6k37fMwE/AaBYXxkyc7MmHIKeW
Tils0ZZcTK0U0udNSel/jRSS/qENEuLvKhFsMAlIDrCETVMidCvv2OAcT0z0z5Ln
v+Oq0Xfutd12nfb95LUfROMtTzrtILYC2qNfDChOoFtlU8UyKmY+WT1GfYUiy8g=
=ahmA
-----END PGP SIGNATURE-----
Merge tag 'for_linus_stable' of git://git.kernel.org/pub/scm/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
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>
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>
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>
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>
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>
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>
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>
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.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJX0vwhAAoJECgfDbjSjVRpcZQH/ie8unPbbdeV8kiYlW3CmYNl
lZc2HzpW/mwm3gTO4ItJUWrvg0S2yfrEF167VJ1tjgRj7breXZ8zdQVVf3mvDykn
66JB1VZ1lFdS06IUHxzeEfKItiqQBYye0PmhRZbDQa46YZzgvC/A6QArTr605JHd
Iggerhncy4OzCQQYbxRE2izXt06cR/Mg9cw3yXOiK/9zWGu6MR92q8BAZmpSNq5d
UbXRd/06UXYwGTd/pzOuq5n+/BnIy91oVpydWIIODr15SEMYfEJqfaFZqiJovuo2
iE4yiHdbofm9rUkiuDCGrEHuLwkQ426oWQ9f6B7sZvtqysq+ZSutiXNpERITN3E=
=k3Xr
-----END PGP SIGNATURE-----
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/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
- 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).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=+uoS
-----END PGP SIGNATURE-----
Merge tag 'pm-4.8-rc6' of git://git.kernel.org/pub/scm/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
- 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.
-----BEGIN PGP SIGNATURE-----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=Hpxa
-----END PGP SIGNATURE-----
Merge tag 'gpio-v4.8-3' of git://git.kernel.org/pub/scm/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"
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
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
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
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=Jobo
-----END PGP SIGNATURE-----
Merge tag 'sound-4.8-rc6' of git://git.kernel.org/pub/scm/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
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>
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>
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)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=QLnH
-----END PGP SIGNATURE-----
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/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()
- 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
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=q0Jo
-----END PGP SIGNATURE-----
Merge tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/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
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
Unfortunately we have a bogus dwc3 patch leaked through the cracks and
got merged into Linus' HEAD. That patch ended up causing off-by-1 error
in our TRB accounting logic. Thankfully John Youn found out the problem
and we provided a revert to the bogus dwc3 patch in no time.
Apart from this off-by-1 error, we have two fixes to the Renesas drivers,
a small fix to our generic phy driver, a NULL pointer dereference fix for
f_eem and a build warning fix in dwc3.
-----BEGIN PGP SIGNATURE-----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=UcMZ
-----END PGP SIGNATURE-----
Merge tag 'fixes-for-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v4.8-rc6
Unfortunately we have a bogus dwc3 patch leaked through the cracks and
got merged into Linus' HEAD. That patch ended up causing off-by-1 error
in our TRB accounting logic. Thankfully John Youn found out the problem
and we provided a revert to the bogus dwc3 patch in no time.
Apart from this off-by-1 error, we have two fixes to the Renesas drivers,
a small fix to our generic phy driver, a NULL pointer dereference fix for
f_eem and a build warning fix in dwc3.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJX0oXaAAoJEEhZKYFQ1nG7298H/RKxcA44iet+zvv8z8EX2yZt
/H26bzu1/5S6GilXmI92KdEdpNgT1bBwp1ZqrGmMh9Zoi13X1aJJEnQGiyn9kxwK
VHNb8UZ7OT2M6Sqf29zlrNfK6zxh3ou8UMK7Gv3YHjL1s0nFtkCsED4vdbisIMnj
UuHzkT5C9l/mnJPhM9G44vXOwJFEZhWdfL5D+KSIi5JlMuBj0z9FZkGiSnchqrzb
IbQvoPWjt+eUCkktTY8yEIU8RThqzVRJrqjeT3TBt3wYZHfCqvVnmCc81QpxvBub
ZIJ1vhPd8zjP/FO6zMD//Rt/B4aTTodqWPtU5EaLwSkYASDBBYJunpyzZWZ+B7s=
=TwAO
-----END PGP SIGNATURE-----
Merge tag 'usb-ci-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-linus
Peter writes:
Fix the possible kernel panic when the hardware signal is bad for chipidea udc.
We have a big rework of the kxsd9 driver queued up behind the fix below and
a fix for a recent fix that was marked for stable.
Hence this fix series is perhaps a little more urgent than average for IIO.
* core
- a fix for a fix in the last set. The recent fix for blocking ops when
! task running left a path (unlikely one) in which the function return
value was not set - so initialise it to 0.
- The IIO_TYPE_FRACTIONAL code previously didn't cope with negative
fractions. Turned out a fix for this was in Analog's tree but hadn't made
it upstream.
* bmc150
- reset chip at init time. At least one board out there ends up coming up
in an unstable state due to noise during power up. The reset does no
harm on other boards.
* kxsd9
- Fix a bug in the reported scaling due to failing to set the integer
part to 0.
* hid-sensors-pressure
- Output was in the wrong units to comply with the IIO ABI.
* tools
- iio_generic_buffer: Fix the trigger-less mode by ensuring we don't fault
out for having no trigger when we explicitly said we didn't want to have
one.
-----BEGIN PGP SIGNATURE-----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=Ob6a
-----END PGP SIGNATURE-----
Merge tag 'iio-fixes-for-4.8b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus
Jonathan writes:
Second set of IIO fixes for the 4.8 cycle.
We have a big rework of the kxsd9 driver queued up behind the fix below and
a fix for a recent fix that was marked for stable.
Hence this fix series is perhaps a little more urgent than average for IIO.
* core
- a fix for a fix in the last set. The recent fix for blocking ops when
! task running left a path (unlikely one) in which the function return
value was not set - so initialise it to 0.
- The IIO_TYPE_FRACTIONAL code previously didn't cope with negative
fractions. Turned out a fix for this was in Analog's tree but hadn't made
it upstream.
* bmc150
- reset chip at init time. At least one board out there ends up coming up
in an unstable state due to noise during power up. The reset does no
harm on other boards.
* kxsd9
- Fix a bug in the reported scaling due to failing to set the integer
part to 0.
* hid-sensors-pressure
- Output was in the wrong units to comply with the IIO ABI.
* tools
- iio_generic_buffer: Fix the trigger-less mode by ensuring we don't fault
out for having no trigger when we explicitly said we didn't want to have
one.
When debug preempt or preempt tracer is enabled, preempt_count_add/sub()
can be traced by function and function graph tracing, and
preempt_disable/enable() would call preempt_count_add/sub(), so in Ftrace
subsystem we should use preempt_disable/enable_notrace instead.
In the commit 345ddcc882 ("ftrace: Have set_ftrace_pid use the bitmap
like events do") the function this_cpu_read() was added to
trace_graph_entry(), and if this_cpu_read() calls preempt_disable(), graph
tracer will go into a recursive loop, even if the tracing_on is
disabled.
So this patch change to use preempt_enable/disable_notrace instead in
this_cpu_read().
Since Yonghui Yang helped a lot to find the root cause of this problem,
so also add his SOB.
Signed-off-by: Yonghui Yang <mark.yang@spreadtrum.com>
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
smp_mb__before_spinlock() is intended to upgrade a spin_lock() operation
to a full barrier, such that prior stores are ordered with respect to
loads and stores occuring inside the critical section.
Unfortunately, the core code defines the barrier as smp_wmb(), which
is insufficient to provide the required ordering guarantees when used in
conjunction with our load-acquire-based spinlock implementation.
This patch overrides the arm64 definition of smp_mb__before_spinlock()
to map to a full smp_mb().
Cc: <stable@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Problems with the signal integrity of the high speed USB data lines or
noise on reference ground lines can cause the i.MX6 USB controller to
violate USB specs and exhibit unexpected behavior.
It was observed that USBi_UI interrupts were triggered first and when
isr_setup_status_phase was called, ci->status was NULL, which lead to a
NULL pointer dereference kernel panic.
This patch fixes the kernel panic, emits a warning once and returns
-EPIPE to halt the device and let the host get stalled.
It also adds a comment to point people, who are experiencing this issue,
to their USB hardware design.
Cc: <stable@vger.kernel.org> #4.1+
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
The cpufreq-stats code can no longer be built as a module, so it now
appears with square brackets in menuconfig.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixes: 1aefc75b24 (cpufreq: stats: Make the stats code non-modular)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Depending on a number of factors including:
- Which exact Rockchip SoC we're working with
- How deep we suspend
- Which i2c port we're on
We might lose the state of the i2c registers at suspend time.
Specifically we've found that on rk3399 the i2c ports that are not in
the PMU power domain lose their state with the current suspend depth
configured by ARM Tursted Firmware.
Note that there are very few actual i2c registers that aren't configured
per transfer anyway so all we actually need to re-configure are the
clock config registers. We'll just add a call to rk3x_i2c_adapt_div()
at resume time and be done with it.
NOTE: On rk3399 on ports whose power was lost, I put printouts in at
resume time. I saw things like:
before: con=0x00010300, div=0x00060006
after: con=0x00010200, div=0x00180025
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Tested-by: David Wu <david.wu@rock-chips.com>
[wsa: removed duplicate const]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
There are several ways to set the SDA hold time for i2c controller,
including: Device Tree, built-in device properties and ACPI. However,
if the SDA hold time is not specified by above method, we should
read the value, where it is preset by firmware, and save it to
sda_hold_time. This is needed because when i2c controller enters
runtime suspend, the DW_IC_SDA_HOLD value will be reset to chipset
default value. And during runtime resume, i2c_dw_init will be called
to reconfigure i2c controller. If sda_hold_time is zero, the chipset
default hold time will be used, that will be too short for some
platforms. Therefore, to have a better tolerance, the DW_IC_SDA_HOLD
value should be kept by sda_hold_time.
Signed-off-by: Zhuo-hao Lee <zhuo-hao.lee@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
condition.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJX0WAXAAoJEEp/3jgCEfOL8bEIAIeVmaU+M/1HuPucc+xiUooy
IP+LNjhSc52neqDsN/eYjTn4zipu0ZAojPW9geGkPHOnKTKdRqkNLpyWaQcSv0AG
yOUiJxnfwZ2LuOD2L/EIzqSKWo1lrdhIP/tSyRk0cOhlXn8urKatEOQi1+8H3Jlr
gzD2PZzXL1jnpCiGPnuYLlh6wmk9Su+7+GCkNOwi1z+j+sM5AupZESPsh6Ze+bYk
xgii4e21cBQv4NXojLECnfNez3HjYJCqYAUZ55lzSneUkbTRdBoY+pye/FeFKIBe
9Wb5IRYzvih9Bcdpx+o5RZtCoKhq1XRngjjvv7cHYELQ0JVM4kFwEKrUHMoHhWU=
=VDDm
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client
Pull ceph fix from Ilya Dryomov:
"A fix for a 4.7 performance regression, caused by a typo in an if
condition"
* tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client:
ceph: do not modify fi->frag in need_reset_readdir()
Pull dmi fix from Jean Delvare.
* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
dmi-id: don't free dev structure after calling device_register
This is a slightly larger batch of fixes that we've been sitting on a few
-rcs. Most of them are simple oneliners, but there are two sets that are
slightly larger and worth pointing out:
- A set of patches to OMAP to deal with hwmod for RTC on am33xx (beaglebone
SoC, among others). It's the only clock that ever has a valid offset of 0,
so a new flag needed introduction once this problem was discovered.
- A collection of CCI fixes for performance counters discovered once people
started using it on X-Gene CPUs.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=8pPd
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"This is a slightly larger batch of fixes that we've been sitting on a
few -rcs. Most of them are simple oneliners, but there are two sets
that are slightly larger and worth pointing out:
- A set of patches to OMAP to deal with hwmod for RTC on am33xx
(beaglebone SoC, among others). It's the only clock that ever has
a valid offset of 0, so a new flag needed introduction once this
problem was discovered.
- A collection of CCI fixes for performance counters discovered once
people started using it on X-Gene CPUs"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (37 commits)
arm-cci: pmu: Fix typo in event name
Revert "ARM: tegra: fix erroneous address in dts"
ARM: dts: imx6qdl: Fix SPDIF regression
ARM: imx6: add missing BM_CLPCR_BYPASS_PMIC_READY setting for imx6sx
ARM: dts: imx7d-sdb: fix ti,x-plate-ohms property name
ARM: dts: kirkwood: Fix PCIe label on OpenRD
ARM: kirkwood: ib62x0: fix size of u-boot environment partition
bus: arm-ccn: make event groups reliable
bus: arm-ccn: fix hrtimer registration
bus: arm-ccn: fix PMU interrupt flags
ARM: tegra: Correct polarity for Tegra114 PMIC interrupt
MAINTAINERS: add tree entry for ARM/UniPhier architecture
ARM: sun5i: Fix typo in trip point temperature
MAINTAINERS: Switch to kernel.org account for Krzysztof Kozlowski
ARM: imx6ul: populates platform device at .init_machine
bus: arm-ccn: Add missing event attribute exclusions for host/guest
bus: arm-ccn: Correct required arguments for XP PMU events
bus: arm-ccn: Fix XP watchpoint settings bitmask
bus: arm-ccn: Do not attempt to configure XPs for cycle counter
bus: arm-ccn: Fix PMU handling of MN
...
Make it clear that adding slave support shall not disable master
functionality. We can have both, so we should.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
We can't use a static property for all the changesets, so we now create
dynamic ones for each changeset.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Fixes: 50a5ba8769 ("i2c: mux: demux-pinctrl: add driver")
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
When a seq-virmidi driver is initialized, it registers a rawmidi
instance with its callback to create an associated seq kernel client.
Currently it's done throughly in rawmidi's register_mutex context.
Recently it was found that this may lead to a deadlock another rawmidi
device that is being attached with the sequencer is accessed, as both
open with the same register_mutex. This was actually triggered by
syzkaller, as Dmitry Vyukov reported:
======================================================
[ INFO: possible circular locking dependency detected ]
4.8.0-rc1+ #11 Not tainted
-------------------------------------------------------
syz-executor/7154 is trying to acquire lock:
(register_mutex#5){+.+.+.}, at: [<ffffffff84fd6d4b>] snd_rawmidi_kernel_open+0x4b/0x260 sound/core/rawmidi.c:341
but task is already holding lock:
(&grp->list_mutex){++++.+}, at: [<ffffffff850138bb>] check_and_subscribe_port+0x5b/0x5c0 sound/core/seq/seq_ports.c:495
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&grp->list_mutex){++++.+}:
[<ffffffff8147a3a8>] lock_acquire+0x208/0x430 kernel/locking/lockdep.c:3746
[<ffffffff863f6199>] down_read+0x49/0xc0 kernel/locking/rwsem.c:22
[< inline >] deliver_to_subscribers sound/core/seq/seq_clientmgr.c:681
[<ffffffff85005c5e>] snd_seq_deliver_event+0x35e/0x890 sound/core/seq/seq_clientmgr.c:822
[<ffffffff85006e96>] > snd_seq_kernel_client_dispatch+0x126/0x170 sound/core/seq/seq_clientmgr.c:2418
[<ffffffff85012c52>] snd_seq_system_broadcast+0xb2/0xf0 sound/core/seq/seq_system.c:101
[<ffffffff84fff70a>] snd_seq_create_kernel_client+0x24a/0x330 sound/core/seq/seq_clientmgr.c:2297
[< inline >] snd_virmidi_dev_attach_seq sound/core/seq/seq_virmidi.c:383
[<ffffffff8502d29f>] snd_virmidi_dev_register+0x29f/0x750 sound/core/seq/seq_virmidi.c:450
[<ffffffff84fd208c>] snd_rawmidi_dev_register+0x30c/0xd40 sound/core/rawmidi.c:1645
[<ffffffff84f816d3>] __snd_device_register.part.0+0x63/0xc0 sound/core/device.c:164
[< inline >] __snd_device_register sound/core/device.c:162
[<ffffffff84f8235d>] snd_device_register_all+0xad/0x110 sound/core/device.c:212
[<ffffffff84f7546f>] snd_card_register+0xef/0x6c0 sound/core/init.c:749
[<ffffffff85040b7f>] snd_virmidi_probe+0x3ef/0x590 sound/drivers/virmidi.c:123
[<ffffffff833ebf7b>] platform_drv_probe+0x8b/0x170 drivers/base/platform.c:564
......
-> #0 (register_mutex#5){+.+.+.}:
[< inline >] check_prev_add kernel/locking/lockdep.c:1829
[< inline >] check_prevs_add kernel/locking/lockdep.c:1939
[< inline >] validate_chain kernel/locking/lockdep.c:2266
[<ffffffff814791f4>] __lock_acquire+0x4d44/0x4d80 kernel/locking/lockdep.c:3335
[<ffffffff8147a3a8>] lock_acquire+0x208/0x430 kernel/locking/lockdep.c:3746
[< inline >] __mutex_lock_common kernel/locking/mutex.c:521
[<ffffffff863f0ef1>] mutex_lock_nested+0xb1/0xa20 kernel/locking/mutex.c:621
[<ffffffff84fd6d4b>] snd_rawmidi_kernel_open+0x4b/0x260 sound/core/rawmidi.c:341
[<ffffffff8502e7c7>] midisynth_subscribe+0xf7/0x350 sound/core/seq/seq_midi.c:188
[< inline >] subscribe_port sound/core/seq/seq_ports.c:427
[<ffffffff85013cc7>] check_and_subscribe_port+0x467/0x5c0 sound/core/seq/seq_ports.c:510
[<ffffffff85015da9>] snd_seq_port_connect+0x2c9/0x500 sound/core/seq/seq_ports.c:579
[<ffffffff850079b8>] snd_seq_ioctl_subscribe_port+0x1d8/0x2b0 sound/core/seq/seq_clientmgr.c:1480
[<ffffffff84ffe9e4>] snd_seq_do_ioctl+0x184/0x1e0 sound/core/seq/seq_clientmgr.c:2225
[<ffffffff84ffeae8>] snd_seq_kernel_client_ctl+0xa8/0x110 sound/core/seq/seq_clientmgr.c:2440
[<ffffffff85027664>] snd_seq_oss_midi_open+0x3b4/0x610 sound/core/seq/oss/seq_oss_midi.c:375
[<ffffffff85023d67>] snd_seq_oss_synth_setup_midi+0x107/0x4c0 sound/core/seq/oss/seq_oss_synth.c:281
[<ffffffff8501b0a8>] snd_seq_oss_open+0x748/0x8d0 sound/core/seq/oss/seq_oss_init.c:274
[<ffffffff85019d8a>] odev_open+0x6a/0x90 sound/core/seq/oss/seq_oss.c:138
[<ffffffff84f7040f>] soundcore_open+0x30f/0x640 sound/sound_core.c:639
......
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&grp->list_mutex);
lock(register_mutex#5);
lock(&grp->list_mutex);
lock(register_mutex#5);
*** DEADLOCK ***
======================================================
The fix is to simply move the registration parts in
snd_rawmidi_dev_register() to the outside of the register_mutex lock.
The lock is needed only to manage the linked list, and it's not
necessarily to cover the whole initialization process.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
When a user timer instance is continued without the explicit start
beforehand, the system gets eventually zero-division error like:
divide error: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN
CPU: 1 PID: 27320 Comm: syz-executor Not tainted 4.8.0-rc3-next-20160825+ #8
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003c9b2280 task.stack: ffff880027280000
RIP: 0010:[<ffffffff858e1a6c>] [< inline >] ktime_divns include/linux/ktime.h:195
RIP: 0010:[<ffffffff858e1a6c>] [<ffffffff858e1a6c>] snd_hrtimer_callback+0x1bc/0x3c0 sound/core/hrtimer.c:62
Call Trace:
<IRQ>
[< inline >] __run_hrtimer kernel/time/hrtimer.c:1238
[<ffffffff81504335>] __hrtimer_run_queues+0x325/0xe70 kernel/time/hrtimer.c:1302
[<ffffffff81506ceb>] hrtimer_interrupt+0x18b/0x420 kernel/time/hrtimer.c:1336
[<ffffffff8126d8df>] local_apic_timer_interrupt+0x6f/0xe0 arch/x86/kernel/apic/apic.c:933
[<ffffffff86e13056>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:957
[<ffffffff86e1210c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:487
<EOI>
.....
Although a similar issue was spotted and a fix patch was merged in
commit [6b760bb2c6: ALSA: timer: fix division by zero after
SNDRV_TIMER_IOCTL_CONTINUE], it seems covering only a part of
iceberg.
In this patch, we fix the issue a bit more drastically. Basically the
continue of an uninitialized timer is supposed to be a fresh start, so
we do it for user timers. For the direct snd_timer_continue() call,
there is no way to pass the initial tick value, so we kick out for the
uninitialized case.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
dmi_dev is freed in error exit code but, according to the document
of device_register, it should never directly free device structure
after calling this function, even if it returned an error! Use
put_device() instead.
Signed-off-by: Allen Hung <allen_hung@dell.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
The stop endpoint command has its own 5 second timeout timer.
If the timeout function is triggered between USB3 and USB2 host
removal it will try to call usb_hc_died(xhci_to_hcd(xhci)->primary_hcd)
the ->primary_hcd will be set to NULL at USB3 hcd removal.
Fix this by first checking if the PCI host is being removed, and
also by using only xhci_to_hcd() as it will always return the primary
hcd.
CC: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull thermal fix from Zhang Rui:
"Only one patch this time, which fixes a crash in rcar_thermal driver.
From Dirk Behme"
* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal: rcar_thermal: Fix priv->zone error handling
A single patch fixing a typo in the temperature trip points in the A13
DTSI.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=4ztu
-----END PGP SIGNATURE-----
Merge tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes
Allwinner fixes for 4.8
A single patch fixing a typo in the temperature trip points in the A13
DTSI.
* tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
ARM: sun5i: Fix typo in trip point temperature
Signed-off-by: Olof Johansson <olof@lixom.net>
For one of the CCI events exposed under sysfs, "snoop" was typo'd as
"snopp". Correct this such that users see the expected event name when
enumerating events via sysfs.
Cc: arm@kernel.org
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
