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2017-06-29Merge tag 'v4.12-rc7' into develLinus Walleij
Linux 4.12-rc7
2017-06-29pinctrl: armada-37xx: Fix number of pin in sdio_sbGregory CLEMENT
The sdio_sb group is composed of 6 pins and not 5. Reported-by: Ken Ma <make@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-06-29pinctrl: armada-37xx: Fix uart2 group selection register maskKen Ma
If north bridge selection register bit1 is clear, pins [10:8] are for SDIO0 Resetn, Wakeup, and PDN while if bit1 is set, pins [10:8]are for GPIO; when bit1 is clear, pin 9 and pin 10 can be used for uart2 RTSn and CTSn, so bit1 should be added to uart2 group and it must be set for both "gpio" and "uart" functions of uart2 group. Signed-off-by: Ken Ma <make@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-06-29pinctrl: bcm2835: Avoid warning from __irq_do_set_handlerStefan Wahren
We get a warning during boot with enabled EARLY_PRINTK that we try to set a irq_chip without data. This is caused by ignoring the return value of irq_of_parse_and_map(). So avoid calling gpiochip_set_chained_irqchip() in error case. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Fixes: 85ae9e512f43 ("pinctrl: bcm2835: switch to GPIOLIB_IRQCHIP") Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-06-25Linux 4.12-rc7v4.12-rc7Linus Torvalds
2017-06-26MAINTAINERS: Add Qualcomm pinctrl drivers sectionBjorn Andersson
Document the maintainership of the Qualcomm pinctrl drivers to improve the hitrate. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-06-25Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Thomas Gleixner: "A single fix to unbreak the vdso32 build for 64bit kernels caused by excess #includes in the mshyperv header" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mshyperv: Remove excess #includes from mshyperv.h
2017-06-25Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Thomas Gleixner: "A few fixes for timekeeping and timers: - Plug a subtle race due to a missing READ_ONCE() in the timekeeping code where reloading of a pointer results in an inconsistent callback argument being supplied to the clocksource->read function. - Correct the CLOCK_MONOTONIC_RAW sub-nanosecond accounting in the time keeping core code, to prevent a possible discontuity. - Apply a similar fix to the arm64 vdso clock_gettime() implementation - Add missing includes to clocksource drivers, which relied on indirect includes which fails in certain configs. - Use the proper iomem pointer for read/iounmap in a probe function" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting time: Fix clock->read(clock) race around clocksource changes clocksource: Explicitly include linux/clocksource.h when needed clocksource/drivers/arm_arch_timer: Fix read and iounmap of incorrect variable
2017-06-25Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "Three fixlets for perf: - Return the proper error code if aux buffers for a event are not supported. - Calculate the probe offset for inlined functions correctly - Update the Skylake DTLB load/store miss event so it can count 1G TLB entries as well" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf probe: Fix probe definition for inlined functions perf/x86/intel: Add 1G DTLB load/store miss support for SKL perf/aux: Correct return code of rb_alloc_aux() if !has_aux(ev)
2017-06-25Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fix from Thomas Gleixner: "A single fix for the MIPS GIC to prevent ftrace recursion" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/mips-gic: Mark count and compare accessors notrace
2017-06-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input fixes from Dmitry Torokhov: - a quirk to i8042 to ignore timeout bit on Lifebook AH544 - a fixup to Synaptics RMI function 54 that was breaking some Dells - a fix for memory leak in soc_button_array driver * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: synaptics-rmi4 - only read the F54 query registers which are used Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list Input: soc_button_array - fix leaking the ACPI button descriptor buffer
2017-06-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds
Pull SCSI target fixes from Nicholas Bellinger: "Here are the target-pending fixes for v4.12-rc7 that have been queued up for the last 2 weeks. This includes: - Fix a TMR related kref underflow detected by the recent refcount_t conversion in upstream. - Fix a iscsi-target corner case during explicit connection logout timeout failure. - Address last fallout in iscsi-target immediate data handling from v4.4 target-core now allowing control CDB payload underflow" * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: iscsi-target: Reject immediate data underflow larger than SCSI transfer length iscsi-target: Fix delayed logout processing greater than SECONDS_FOR_LOGOUT_COMP target: Fix kref->refcount underflow in transport_cmd_finish_abort
2017-06-24Merge tag 'kbuild-fixes-v4.12-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: "Nothing scary, just some random fixes: - fix warnings of host programs - fix "make tags" when COMPILED_SOURCE=1 is specified along with O= - clarify help message of C=1 option - fix dependency for ncurses compatibility check - fix "make headers_install" for fakechroot environment" * tag 'kbuild-fixes-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: fix sparse warnings in nconfig kbuild: fix header installation under fakechroot environment kconfig: Check for libncurses before menuconfig Kbuild: tiny correction on `make help` tags: honor COMPILED_SOURCE with apart output directory genksyms: add printf format attribute to error_with_pos()
2017-06-24Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull timer fix from Eric Biederman: "This fixes an issue of confusing injected signals with the signals from posix timers that has existed since posix timers have been in the kernel. This patch is slightly simpler than my earlier version of this patch as I discovered in testing that I had misspelled "#ifdef CONFIG_POSIX_TIMERS". So I deleted that unnecessary test and made setting of resched_timer uncondtional. I have tested this and verified that without this patch there is a nasty hang that is easy to trigger, and with this patch everything works properly" Thomas Gleixner dixit: "It fixes the problem at hand and covers the ptrace case as well, which I missed. Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: signal: Only reschedule timers on signals timers have sent
2017-06-24x86/mshyperv: Remove excess #includes from mshyperv.hThomas Gleixner
A recent commit included linux/slab.h in linux/irq.h. This breaks the build of vdso32 on a 64-bit kernel. The reason is that linux/irq.h gets included into the vdso code via linux/interrupt.h which is included from asm/mshyperv.h. That makes the 32-bit vdso compile fail, because slab.h includes the pgtable headers for 64-bit on a 64-bit build. Neither linux/clocksource.h nor linux/interrupt.h are needed in the mshyperv.h header file itself - it has a dependency on <linux/atomic.h>. Remove the includes and unbreak the build. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: devel@linuxdriverproject.org Fixes: dee863b571b0 ("hv: export current Hyper-V clocksource") Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1706231038460.2647@nanos Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-23Merge tag 'powerpc-4.12-7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "Some more powerpc fixes for 4.12. Most of these actually came in last week but got held up for some more testing. - three fixes for kprobes/ftrace/livepatch interactions. - properly handle data breakpoints when using the Radix MMU. - fix for perf sampling of registers during call_usermodehelper(). - properly initialise the thread_info on our emergency stacks - add an explicit flush when doing TLB invalidations for a process using NPU2. Thanks to: Alistair Popple, Naveen N. Rao, Nicholas Piggin, Ravi Bangoria, Masami Hiramatsu" * tag 'powerpc-4.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64: Initialise thread_info for emergency stacks powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD powerpc/perf: Fix oops when kthread execs user process powerpc/64s: Handle data breakpoints in Radix mode powerpc/kprobes: Skip livepatch_handler() for jprobes powerpc/ftrace: Pass the correct stack pointer for DYNAMIC_FTRACE_WITH_REGS powerpc/kprobes: Pause function_graph tracing during jprobes handling
2017-06-23Merge tag 'acpi-4.12-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fix from Rafael Wysocki: "This fixes the ACPI-based enumeration of some I2C and SPI devices broken in 4.11. Specifics: - I2C and SPI devices are expected to be enumerated by the I2C and SPI subsystems, respectively, but due to a change made during the 4.11 cycle, in some cases the ACPI core marks them as already enumerated which causes the I2C and SPI subsystems to overlook them, so fix that (Jarkko Nikula)" * tag 'acpi-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / scan: Fix enumeration for special SPI and I2C devices
2017-06-23Merge branch 'i2c/for-current-fixed' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fix from Wolfram Sang. * 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: imx: Use correct function to write to register
2017-06-23Merge tag 'gpio-v4.12-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO fix from Linus Walleij: "A single GPIO patch fixing the compatible string for the MVEBU PWM controller embedded in the GPIO controller before we release v4.12. Hopefully" * tag 'gpio-v4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: mvebu: change compatible string for PWM support
2017-06-23Merge tag 'sound-4.12-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Nothing exciting here, just a few stable fixes: - suppress spurious kernel WARNING in PCM core - fix potential spin deadlock at error handling in firewire - HD-audio PCI ID addition / fixup" * tag 'sound-4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Apply quirks to Broxton-T, too ALSA: firewire-lib: Fix stall of process context at packet error ALSA: pcm: Don't treat NULL chmap as a fatal error ALSA: hda - Add Coffelake PCI ID
2017-06-23Merge tag 'drm-fixes-for-v4.12-rc7' of ↵Linus Torvalds
git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "A varied bunch of fixes, one for an API regression with connectors. Otherwise amdgpu and i915 have a bunch of varied fixes, the shrinker ones being the most important" * tag 'drm-fixes-for-v4.12-rc7' of git://people.freedesktop.org/~airlied/linux: drm: Fix GETCONNECTOR regression drm/radeon: add a quirk for Toshiba Satellite L20-183 drm/radeon: add a PX quirk for another K53TK variant drm/amdgpu: adjust default display clock drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating drm/amdgpu: add Polaris12 DID drm/i915: Don't enable backlight at setup time. drm/i915: Plumb the correct acquire ctx into intel_crtc_disable_noatomic() drm/i915: Fix deadlock witha the pipe A quirk during resume drm/i915: Remove __GFP_NORETRY from our buffer allocator drm/i915: Encourage our shrinker more when our shmemfs allocations fails drm/i915: Differentiate between sw write location into ring and last hw read
2017-06-23Merge tag 'random_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull random fixes from Ted Ts'o: "Fix some locking and gcc optimization issues from the most recent random_for_linus_stable pull request" * tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: silence compiler warnings and fix race
2017-06-23Merge tag 'for-4.12/dm-fixes-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - a revert of a DM mirror commit that has proven to make the code prone to crash - a DM io reference count fix that resolves a NULL pointer seen when issuing discards to a DM mirror target's device whose mirror legs do not all support discards - a couple DM integrity fixes * tag 'for-4.12/dm-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm io: fix duplicate bio completion due to missing ref count dm integrity: fix to not disable/enable interrupts from interrupt context Revert "dm mirror: use all available legs on multiple failures" dm integrity: reject mappings too large for device
2017-06-23Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "8 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: fs/exec.c: account for argv/envp pointers ocfs2: fix deadlock caused by recursive locking in xattr slub: make sysfs file removal asynchronous lib/cmdline.c: fix get_options() overflow while parsing ranges fs/dax.c: fix inefficiency in dax_writeback_mapping_range() autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAIL mm/vmalloc.c: huge-vmap: fail gracefully on unexpected huge vmap mappings mm, thp: remove cond_resched from __collapse_huge_page_copy
2017-06-23fs/exec.c: account for argv/envp pointersKees Cook
When limiting the argv/envp strings during exec to 1/4 of the stack limit, the storage of the pointers to the strings was not included. This means that an exec with huge numbers of tiny strings could eat 1/4 of the stack limit in strings and then additional space would be later used by the pointers to the strings. For example, on 32-bit with a 8MB stack rlimit, an exec with 1677721 single-byte strings would consume less than 2MB of stack, the max (8MB / 4) amount allowed, but the pointers to the strings would consume the remaining additional stack space (1677721 * 4 == 6710884). The result (1677721 + 6710884 == 8388605) would exhaust stack space entirely. Controlling this stack exhaustion could result in pathological behavior in setuid binaries (CVE-2017-1000365). [akpm@linux-foundation.org: additional commenting from Kees] Fixes: b6a2fea39318 ("mm: variable length argument support") Link: http://lkml.kernel.org/r/20170622001720.GA32173@beast Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Qualys Security Advisory <qsa@qualys.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23ocfs2: fix deadlock caused by recursive locking in xattrEric Ren
Another deadlock path caused by recursive locking is reported. This kind of issue was introduced since commit 743b5f1434f5 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()"). Two deadlock paths have been fixed by commit b891fa5024a9 ("ocfs2: fix deadlock issue when taking inode lock at vfs entry points"). Yes, we intend to fix this kind of case in incremental way, because it's hard to find out all possible paths at once. This one can be reproduced like this. On node1, cp a large file from home directory to ocfs2 mountpoint. While on node2, run setfacl/getfacl. Both nodes will hang up there. The backtraces: On node1: __ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2] ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2] ocfs2_write_begin+0x43/0x1a0 [ocfs2] generic_perform_write+0xa9/0x180 __generic_file_write_iter+0x1aa/0x1d0 ocfs2_file_write_iter+0x4f4/0xb40 [ocfs2] __vfs_write+0xc3/0x130 vfs_write+0xb1/0x1a0 SyS_write+0x46/0xa0 On node2: __ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2] ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2] ocfs2_xattr_set+0x12e/0xe80 [ocfs2] ocfs2_set_acl+0x22d/0x260 [ocfs2] ocfs2_iop_set_acl+0x65/0xb0 [ocfs2] set_posix_acl+0x75/0xb0 posix_acl_xattr_set+0x49/0xa0 __vfs_setxattr+0x69/0x80 __vfs_setxattr_noperm+0x72/0x1a0 vfs_setxattr+0xa7/0xb0 setxattr+0x12d/0x190 path_setxattr+0x9f/0xb0 SyS_setxattr+0x14/0x20 Fix this one by using ocfs2_inode_{lock|unlock}_tracker, which is exported by commit 439a36b8ef38 ("ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock"). Link: http://lkml.kernel.org/r/20170622014746.5815-1-zren@suse.com Fixes: 743b5f1434f5 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()") Signed-off-by: Eric Ren <zren@suse.com> Reported-by: Thomas Voegtle <tv@lio96.de> Tested-by: Thomas Voegtle <tv@lio96.de> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23slub: make sysfs file removal asynchronousTejun Heo
Commit bf5eb3de3847 ("slub: separate out sysfs_slab_release() from sysfs_slab_remove()") made slub sysfs file removals synchronous to kmem_cache shutdown. Unfortunately, this created a possible ABBA deadlock between slab_mutex and sysfs draining mechanism triggering the following lockdep warning. ====================================================== [ INFO: possible circular locking dependency detected ] 4.10.0-test+ #48 Not tainted ------------------------------------------------------- rmmod/1211 is trying to acquire lock: (s_active#120){++++.+}, at: [<ffffffff81308073>] kernfs_remove+0x23/0x40 but task is already holding lock: (slab_mutex){+.+.+.}, at: [<ffffffff8120f691>] kmem_cache_destroy+0x41/0x2d0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (slab_mutex){+.+.+.}: lock_acquire+0xf6/0x1f0 __mutex_lock+0x75/0x950 mutex_lock_nested+0x1b/0x20 slab_attr_store+0x75/0xd0 sysfs_kf_write+0x45/0x60 kernfs_fop_write+0x13c/0x1c0 __vfs_write+0x28/0x120 vfs_write+0xc8/0x1e0 SyS_write+0x49/0xa0 entry_SYSCALL_64_fastpath+0x1f/0xc2 -> #0 (s_active#120){++++.+}: __lock_acquire+0x10ed/0x1260 lock_acquire+0xf6/0x1f0 __kernfs_remove+0x254/0x320 kernfs_remove+0x23/0x40 sysfs_remove_dir+0x51/0x80 kobject_del+0x18/0x50 __kmem_cache_shutdown+0x3e6/0x460 kmem_cache_destroy+0x1fb/0x2d0 kvm_exit+0x2d/0x80 [kvm] vmx_exit+0x19/0xa1b [kvm_intel] SyS_delete_module+0x198/0x1f0 entry_SYSCALL_64_fastpath+0x1f/0xc2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(slab_mutex); lock(s_active#120); lock(slab_mutex); lock(s_active#120); *** DEADLOCK *** 2 locks held by rmmod/1211: #0: (cpu_hotplug.dep_map){++++++}, at: [<ffffffff810a7877>] get_online_cpus+0x37/0x80 #1: (slab_mutex){+.+.+.}, at: [<ffffffff8120f691>] kmem_cache_destroy+0x41/0x2d0 stack backtrace: CPU: 3 PID: 1211 Comm: rmmod Not tainted 4.10.0-test+ #48 Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v02.05 05/07/2012 Call Trace: print_circular_bug+0x1be/0x210 __lock_acquire+0x10ed/0x1260 lock_acquire+0xf6/0x1f0 __kernfs_remove+0x254/0x320 kernfs_remove+0x23/0x40 sysfs_remove_dir+0x51/0x80 kobject_del+0x18/0x50 __kmem_cache_shutdown+0x3e6/0x460 kmem_cache_destroy+0x1fb/0x2d0 kvm_exit+0x2d/0x80 [kvm] vmx_exit+0x19/0xa1b [kvm_intel] SyS_delete_module+0x198/0x1f0 ? SyS_delete_module+0x5/0x1f0 entry_SYSCALL_64_fastpath+0x1f/0xc2 It'd be the cleanest to deal with the issue by removing sysfs files without holding slab_mutex before the rest of shutdown; however, given the current code structure, it is pretty difficult to do so. This patch punts sysfs file removal to a work item. Before commit bf5eb3de3847, the removal was punted to a RCU delayed work item which is executed after release. Now, we're punting to a different work item on shutdown which still maintains the goal removing the sysfs files earlier when destroying kmem_caches. Link: http://lkml.kernel.org/r/20170620204512.GI21326@htj.duckdns.org Fixes: bf5eb3de3847 ("slub: separate out sysfs_slab_release() from sysfs_slab_remove()") Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23lib/cmdline.c: fix get_options() overflow while parsing rangesIlya Matveychikov
When using get_options() it's possible to specify a range of numbers, like 1-100500. The problem is that it doesn't track array size while calling internally to get_range() which iterates over the range and fills the memory with numbers. Link: http://lkml.kernel.org/r/2613C75C-B04D-4BFF-82A6-12F97BA0F620@gmail.com Signed-off-by: Ilya V. Matveychikov <matvejchikov@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23fs/dax.c: fix inefficiency in dax_writeback_mapping_range()Jan Kara
dax_writeback_mapping_range() fails to update iteration index when searching radix tree for entries needing cache flushing. Thus each pagevec worth of entries is searched starting from the start which is inefficient and prone to livelocks. Update index properly. Link: http://lkml.kernel.org/r/20170619124531.21491-1-jack@suse.cz Fixes: 9973c98ecfda3 ("dax: add support for fsync/sync") Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Dan Williams <dan.j.williams@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>
2017-06-23autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAILNeilBrown
If a positive status is passed with the AUTOFS_DEV_IOCTL_FAIL ioctl, autofs4_d_automount() will return ERR_PTR(status) with that status to follow_automount(), which will then dereference an invalid pointer. So treat a positive status the same as zero, and map to ENOENT. See comment in systemd src/core/automount.c::automount_send_ready(). Link: http://lkml.kernel.org/r/871sqwczx5.fsf@notabene.neil.brown.name Signed-off-by: NeilBrown <neilb@suse.com> Cc: Ian Kent <raven@themaw.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23mm/vmalloc.c: huge-vmap: fail gracefully on unexpected huge vmap mappingsArd Biesheuvel
Existing code that uses vmalloc_to_page() may assume that any address for which is_vmalloc_addr() returns true may be passed into vmalloc_to_page() to retrieve the associated struct page. This is not un unreasonable assumption to make, but on architectures that have CONFIG_HAVE_ARCH_HUGE_VMAP=y, it no longer holds, and we need to ensure that vmalloc_to_page() does not go off into the weeds trying to dereference huge PUDs or PMDs as table entries. Given that vmalloc() and vmap() themselves never create huge mappings or deal with compound pages at all, there is no correct answer in this case, so return NULL instead, and issue a warning. When reading /proc/kcore on arm64, you will hit an oops as soon as you hit the huge mappings used for the various segments that make up the mapping of vmlinux. With this patch applied, you will no longer hit the oops, but the kcore contents willl be incorrect (these regions will be zeroed out) We are fixing this for kcore specifically, so it avoids vread() for those regions. At least one other problematic user exists, i.e., /dev/kmem, but that is currently broken on arm64 for other reasons. Link: http://lkml.kernel.org/r/20170609082226.26152-1-ard.biesheuvel@linaro.org Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Laura Abbott <labbott@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: zhong jiang <zhongjiang@huawei.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23mm, thp: remove cond_resched from __collapse_huge_page_copyDavid Rientjes
This is a partial revert of commit 338a16ba1549 ("mm, thp: copying user pages must schedule on collapse") which added a cond_resched() to __collapse_huge_page_copy(). On x86 with CONFIG_HIGHPTE, __collapse_huge_page_copy is called in atomic context and thus scheduling is not possible. This is only a possible config on arm and i386. Although need_resched has been shown to be set for over 100 jiffies while doing the iteration in __collapse_huge_page_copy, this is better than doing if (in_atomic()) cond_resched() to cover only non-CONFIG_HIGHPTE configs. Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1706191341550.97821@chino.kir.corp.google.com Signed-off-by: David Rientjes <rientjes@google.com> Reported-by: Larry Finger <Larry.Finger@lwfinger.net> Tested-by: Larry Finger <Larry.Finger@lwfinger.net> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-23Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Two fixes to remove spurious WARN_ONs from the new(ish) qedi driver. The driver already prints a warning message, there's no need to panic users by printing something that looks like an oops as well" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: qedi: Remove WARN_ON from clear task context. scsi: qedi: Remove WARN_ON for untracked cleanup.
2017-06-23Merge tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds
Pull xfs fixes from Darrick Wong: "I have one more bugfix for you for 4.12-rc7 to fix a disk corruption problem: - don't allow swapon on files on the realtime device, because the swap code will swap pages out to blocks on the data device, thereby corrupting the filesystem" * tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: don't allow bmap on rt files
2017-06-23Merge tag 'perf-urgent-for-mingo-4.12-20170622' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull 'perf probe' fix from Arnaldo Carvalho de Melo: - Do not double the offset of inline expansions when using 'perf probe' on inlined functions (Björn Töpel) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-23Input: synaptics-rmi4 - only read the F54 query registers which are usedAndrew Duggan
The F54 driver is currently only using the first 6 bytes of F54 so there is no need to read all 27 bytes. Some Dell systems (Dell XP13 9333 and similar) have an issue with the touchpad or I2C bus when reading reports larger then 16 bytes. Reads larger then 16 bytes are reported in two HID reports. Something about the back to back reports seems to cause the next read to report incorrect data. This results in F30 failing to load and the click button failing to work. Previous issues with the I2C controller or touchpad were addressed in: commit 5b65c2a02966 ("HID: rmi: check sanity of the incoming report") Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=195949 Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Reviewed-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2017-06-23powerpc/64: Initialise thread_info for emergency stacksNicholas Piggin
Emergency stacks have their thread_info mostly uninitialised, which in particular means garbage preempt_count values. Emergency stack code runs with interrupts disabled entirely, and is used very rarely, so this has been unnoticed so far. It was found by a proposed new powerpc watchdog that takes a soft-NMI directly from the masked_interrupt handler and using the emergency stack. That crashed at BUG_ON(in_nmi()) in nmi_enter(). preempt_count()s were found to be garbage. To fix this, zero the entire THREAD_SIZE allocation, and initialize the thread_info. Cc: stable@vger.kernel.org Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Move it all into setup_64.c, use a function not a macro. Fix crashes on Cell by setting preempt_count to 0 not HARDIRQ_OFFSET] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-23Merge tag 'drm-misc-fixes-2017-06-22' of ↵Dave Airlie
git://anongit.freedesktop.org/git/drm-misc into drm-fixes UAPI Changes: - drm: Fix regression in GETCONNECTOR ioctl returning stale properties (Daniel) Cc: Daniel Vetter <daniel.vetter@ffwll.ch> * tag 'drm-misc-fixes-2017-06-22' of git://anongit.freedesktop.org/git/drm-misc: drm: Fix GETCONNECTOR regression
2017-06-23kconfig: fix sparse warnings in nconfigRandy Dunlap
Fix sparse warnings in scripts/kconfig/nconf* ('make nconfig'): ../scripts/kconfig/nconf.c:1071:32: warning: Using plain integer as NULL pointer ../scripts/kconfig/nconf.c:1238:30: warning: Using plain integer as NULL pointer ../scripts/kconfig/nconf.c:511:51: warning: Using plain integer as NULL pointer ../scripts/kconfig/nconf.c:1460:6: warning: symbol 'setup_windows' was not declared. Should it be static? ../scripts/kconfig/nconf.c:274:12: warning: symbol 'current_instructions' was not declared. Should it be static? ../scripts/kconfig/nconf.c:308:22: warning: symbol 'function_keys' was not declared. Should it be static? ../scripts/kconfig/nconf.gui.c:132:17: warning: non-ANSI function declaration of function 'set_colors' ../scripts/kconfig/nconf.gui.c:195:24: warning: Using plain integer as NULL pointer nconf.gui.o before/after files are the same. nconf.o before/after files are the same until the 'static' function declarations are added. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-06-22perf probe: Fix probe definition for inlined functionsBjörn Töpel
In commit 613f050d68a8 ("perf probe: Fix to probe on gcc generated functions in modules"), the offset from symbol is, incorrectly, added to the trace point address. This leads to incorrect probe trace points for inlined functions and when using relative line number on symbols. Prior this patch: $ perf probe -m nf_nat -D in_range p:probe/in_range nf_nat:in_range.isra.9+0 $ perf probe -m i40e -D i40e_clean_rx_irq p:probe/i40e_clean_rx_irq i40e:i40e_napi_poll+2212 $ perf probe -m i40e -D i40e_clean_rx_irq:16 p:probe/i40e_clean_rx_irq i40e:i40e_lan_xmit_frame+626 After: $ perf probe -m nf_nat -D in_range p:probe/in_range nf_nat:in_range.isra.9+0 $ perf probe -m i40e -D i40e_clean_rx_irq p:probe/i40e_clean_rx_irq i40e:i40e_napi_poll+1106 $ perf probe -m i40e -D i40e_clean_rx_irq:16 p:probe/i40e_clean_rx_irq i40e:i40e_napi_poll+2665 Committer testing: Using 'pfunct', a tool found in the 'dwarves' package [1], one can ask what are the functions that while not being explicitely marked as inline, were inlined by the compiler: # pfunct --cc_inlined /lib/modules/4.12.0-rc4+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko | head __ew32 e1000_regdump e1000e_dump_ps_pages e1000_desc_unused e1000e_systim_to_hwtstamp e1000e_rx_hwtstamp e1000e_update_rdt_wa e1000e_update_tdt_wa e1000_put_txbuf e1000_consume_page Then ask 'perf probe' to produce the kprobe_tracer probe definitions for two of them: # perf probe -m e1000e -D e1000e_rx_hwtstamp p:probe/e1000e_rx_hwtstamp e1000e:e1000_receive_skb+74 # perf probe -m e1000e -D e1000_consume_page p:probe/e1000_consume_page e1000e:e1000_clean_jumbo_rx_irq+876 p:probe/e1000_consume_page_1 e1000e:e1000_clean_jumbo_rx_irq+1506 p:probe/e1000_consume_page_2 e1000e:e1000_clean_rx_irq_ps+1074 Now lets concentrate on the 'e1000_consume_page' one, that was inlined twice in e1000_clean_jumbo_rx_irq(), lets see what readelf says about the DWARF tags for that function: $ readelf -wi /lib/modules/4.12.0-rc4+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko <SNIP> <1><13e27b>: Abbrev Number: 121 (DW_TAG_subprogram) <13e27c> DW_AT_name : (indirect string, offset: 0xa8945): e1000_clean_jumbo_rx_irq <13e287> DW_AT_low_pc : 0x17a30 <3><13e6ef>: Abbrev Number: 119 (DW_TAG_inlined_subroutine) <13e6f0> DW_AT_abstract_origin: <0x13ed2c> <13e6f4> DW_AT_low_pc : 0x17be6 <SNIP> <1><13ed2c>: Abbrev Number: 142 (DW_TAG_subprogram) <13ed2e> DW_AT_name : (indirect string, offset: 0xa54c3): e1000_consume_page So, the first time in e1000_clean_jumbo_rx_irq() where e1000_consume_page() is inlined is at PC 0x17be6, which subtracted from e1000_clean_jumbo_rx_irq()'s address, gives us the offset we should use in the probe definition: 0x17be6 - 0x17a30 = 438 but above we have 876, which is twice as much. Lets see the second inline expansion of e1000_consume_page() in e1000_clean_jumbo_rx_irq(): <3><13e86e>: Abbrev Number: 119 (DW_TAG_inlined_subroutine) <13e86f> DW_AT_abstract_origin: <0x13ed2c> <13e873> DW_AT_low_pc : 0x17d21 0x17d21 - 0x17a30 = 753 So we where adding it at twice the offset from the containing function as we should. And then after this patch: # perf probe -m e1000e -D e1000e_rx_hwtstamp p:probe/e1000e_rx_hwtstamp e1000e:e1000_receive_skb+37 # perf probe -m e1000e -D e1000_consume_page p:probe/e1000_consume_page e1000e:e1000_clean_jumbo_rx_irq+438 p:probe/e1000_consume_page_1 e1000e:e1000_clean_jumbo_rx_irq+753 p:probe/e1000_consume_page_2 e1000e:e1000_clean_jumbo_rx_irq+1353 # Which matches the two first expansions and shows that because we were doubling the offset it would spill over the next function: readelf -sw /lib/modules/4.12.0-rc4+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko 673: 0000000000017a30 1626 FUNC LOCAL DEFAULT 2 e1000_clean_jumbo_rx_irq 674: 0000000000018090 2013 FUNC LOCAL DEFAULT 2 e1000_clean_rx_irq_ps This is the 3rd inline expansion of e1000_consume_page() in e1000_clean_jumbo_rx_irq(): <3><13ec77>: Abbrev Number: 119 (DW_TAG_inlined_subroutine) <13ec78> DW_AT_abstract_origin: <0x13ed2c> <13ec7c> DW_AT_low_pc : 0x17f79 0x17f79 - 0x17a30 = 1353 So: 0x17a30 + 2 * 1353 = 0x184c2 And: 0x184c2 - 0x18090 = 1074 Which explains the bogus third expansion for e1000_consume_page() to end up at: p:probe/e1000_consume_page_2 e1000e:e1000_clean_rx_irq_ps+1074 All fixed now :-) [1] https://git.kernel.org/pub/scm/devel/pahole/pahole.git/ Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: stable@vger.kernel.org Fixes: 613f050d68a8 ("perf probe: Fix to probe on gcc generated functions in modules") Link: http://lkml.kernel.org/r/20170621164134.5701-1-bjorn.topel@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-22Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull cifs fixes from Steve French: "Various small fixes for stable" * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: CIFS: Fix some return values in case of error in 'crypt_message' cifs: remove redundant return in cifs_creation_time_get CIFS: Improve readdir verbosity CIFS: check if pages is null rather than bv for a failed allocation CIFS: Set ->should_dirty in cifs_user_readv()
2017-06-22Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM fixes from Radim Krčmář: "MIPS: - Fix build with KVM, DYNAMIC_DEBUG and JUMP_LABEL. PPC: - Fix host crashes/hangs on POWER9. - Properly restore userspace state after KVM_RUN ioctl. s390: - Fix address translation in odd-ball cases (real-space designation ASCEs). x86: - Fix privilege escalation in 64-bit Windows guests All patches are for stable and the x86 also has a CVE" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: fix singlestepping over syscall KVM: s390: gaccess: fix real-space designation asce handling for gmap shadows KVM: MIPS: Fix maybe-uninitialized build failure KVM: PPC: Book3S HV: Ignore timebase offset on POWER9 DD1 KVM: PPC: Book3S HV: Save/restore host values of debug registers KVM: PPC: Book3S HV: Preserve userspace HTM state properly KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit KVM: PPC: Book3S HV: Context-switch EBB registers properly KVM: PPC: Book3S HV: Cope with host using large decrementer mode
2017-06-22Merge tag 'mfd-fixes-4.12' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD fixes from Lee Jones: - arizona: use address passed in, rather than hard coded value - correct STM32 clock-names value in DT binding documentation * tag 'mfd-fixes-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: dt-bindings: mfd: Update STM32 timers clock names mfd: arizona: Fix typo using hard-coded register
2017-06-22KVM: x86: fix singlestepping over syscallPaolo Bonzini
TF is handled a bit differently for syscall and sysret, compared to the other instructions: TF is checked after the instruction completes, so that the OS can disable #DB at a syscall by adding TF to FMASK. When the sysret is executed the #DB is taken "as if" the syscall insn just completed. KVM emulates syscall so that it can trap 32-bit syscall on Intel processors. Fix the behavior, otherwise you could get #DB on a user stack which is not nice. This does not affect Linux guests, as they use an IST or task gate for #DB. This fixes CVE-2017-7518. Cc: stable@vger.kernel.org Reported-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-06-22Merge tag 'kvm-s390-master-4.12-2' of ↵Radim Krčmář
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux KVM: s390: fix shadow table handling for nested guests Some odd-ball cases (real-space designation ASCEs) are handled wrong for the shadow page tables. Fix it.
2017-06-22powerpc/powernv/npu-dma: Add explicit flush when sending an ATSDAlistair Popple
NPU2 requires an extra explicit flush to an active GPU PID when sending address translation shoot downs (ATSDs) to reliably flush the GPU TLB. This patch adds just such a flush at the end of each sequence of ATSDs. We can safely use PID 0 which is always reserved and active on the GPU. PID 0 is only used for init_mm which will never be a user mm on the GPU. To enforce this we add a check in pnv_npu2_init_context() just in case someone tries to use PID 0 on the GPU. Signed-off-by: Alistair Popple <alistair@popple.id.au> [mpe: Use true/false for bool literals] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-22KVM: s390: gaccess: fix real-space designation asce handling for gmap shadowsHeiko Carstens
For real-space designation asces the asce origin part is only a token. The asce token origin must not be used to generate an effective address for storage references. This however is erroneously done within kvm_s390_shadow_tables(). Furthermore within the same function the wrong parts of virtual addresses are used to generate a corresponding real address (e.g. the region second index is used as region first index). Both of the above can result in incorrect address translations. Only for real space designations with a token origin of zero and addresses below one megabyte the translation was correct. Furthermore replace a "!asce.r" statement with a "!*fake" statement to make it more obvious that a specific condition has nothing to do with the architecture, but with the fake handling of real space designations. Fixes: 3218f7094b6b ("s390/mm: support real-space for gmap shadows") Cc: David Hildenbrand <david@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-06-22perf/x86/intel: Add 1G DTLB load/store miss support for SKLKan Liang
Current DTLB load/store miss events (0x608/0x649) only counts 4K,2M and 4M page size. Need to extend the events to support any page size (4K/2M/4M/1G). The complete DTLB load/store miss events are: DTLB_LOAD_MISSES.WALK_COMPLETED 0xe08 DTLB_STORE_MISSES.WALK_COMPLETED 0xe49 Signed-off-by: Kan Liang <Kan.liang@intel.com> Cc: <stable@vger.kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: eranian@google.com Link: http://lkml.kernel.org/r/20170619142609.11058-1-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-22i2c: imx: Use correct function to write to registerMichail Georgios Etairidis
The i2c-imx driver incorrectly uses readb()/writeb() to read and write to the appropriate registers when performing a repeated start. The appropriate imx_i2c_read_reg()/imx_i2c_write_reg() functions should be used instead. Performing a repeated start results in a kernel panic. The platform is imx. Signed-off-by: Michail G Etairidis <m.etairidis@beck-ipc.com> Fixes: ce1a78840ff7 ("i2c: imx: add DMA support for freescale i2c driver") Fixes: 054b62d9f25c ("i2c: imx: fix the i2c bus hang issue when do repeat restart") Acked-by: Fugang Duan <fugang.duan@nxp.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-06-21Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "This contains a set of fixes for xen-blkback by way of Konrad, and a performance regression fix for blk-mq for shared tags. The latter could account for as much as a 50x reduction in performance, with the test case from the user with 500 name spaces. A more realistic setup on my end with 32 drives showed a 3.5x drop. The fix has been thoroughly tested before being committed" * 'for-linus' of git://git.kernel.dk/linux-block: blk-mq: fix performance regression with shared tags xen-blkback: don't leak stack data via response ring xen/blkback: don't use xen_blkif_get() in xen-blkback kthread xen/blkback: don't free be structure too early xen/blkback: fix disconnect while I/Os in flight
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