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2017-08-20Linux 4.13-rc6v4.13-rc6Linus Torvalds
2017-08-20Sanitize 'move_pages()' permission checksLinus Torvalds
The 'move_paghes()' system call was introduced long long ago with the same permission checks as for sending a signal (except using CAP_SYS_NICE instead of CAP_SYS_KILL for the overriding capability). That turns out to not be a great choice - while the system call really only moves physical page allocations around (and you need other capabilities to do a lot of it), you can check the return value to map out some the virtual address choices and defeat ASLR of a binary that still shares your uid. So change the access checks to the more common 'ptrace_may_access()' model instead. This tightens the access checks for the uid, and also effectively changes the CAP_SYS_NICE check to CAP_SYS_PTRACE, but it's unlikely that anybody really _uses_ this legacy system call any more (we hav ebetter NUMA placement models these days), so I expect nobody to notice. Famous last words. Reported-by: Otto Ebeling <otto.ebeling@iki.fi> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Willy Tarreau <w@1wt.eu> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-20Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "Another pile of small fixes and updates for x86: - Plug a hole in the SMAP implementation which misses to clear AC on NMI entry - Fix the norandmaps/ADDR_NO_RANDOMIZE logic so the command line parameter works correctly again - Use the proper accessor in the startup64 code for next_early_pgt to prevent accessing of invalid addresses and faulting in the early boot code. - Prevent CPU hotplug lock recursion in the MTRR code - Unbreak CPU0 hotplugging - Rename overly long CPUID bits which got introduced in this cycle - Two commits which mark data 'const' and restrict the scope of data and functions to file scope by making them 'static'" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Constify attribute_group structures x86/boot/64/clang: Use fixup_pointer() to access 'next_early_pgt' x86/elf: Remove the unnecessary ADDR_NO_RANDOMIZE checks x86: Fix norandmaps/ADDR_NO_RANDOMIZE x86/mtrr: Prevent CPU hotplug lock recursion x86: Mark various structures and functions as 'static' x86/cpufeature, kvm/svm: Rename (shorten) the new "virtualized VMSAVE/VMLOAD" CPUID flag x86/smpboot: Unbreak CPU0 hotplug x86/asm/64: Clear AC on NMI entries
2017-08-20Merge 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 small fixes for timer drivers: - Prevent infinite recursion in the arm architected timer driver with ftrace - Propagate error codes to the caller in case of failure in EM STI driver - Adjust a bogus loop iteration in the arm architected timer driver - Add a missing Kconfig dependency to the pistachio clocksource to prevent build failures - Correctly check for IS_ERR() instead of NULL in the shared timer-of code" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource/drivers/arm_arch_timer: Avoid infinite recursion when ftrace is enabled clocksource/drivers/Kconfig: Fix CLKSRC_PISTACHIO dependencies clocksource/drivers/timer-of: Checking for IS_ERR() instead of NULL clocksource/drivers/em_sti: Fix error return codes in em_sti_probe() clocksource/drivers/arm_arch_timer: Fix mem frame loop initialization
2017-08-20Merge 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: "Two fixes for the perf subsystem: - Fix an inconsistency of RDPMC mm struct tagging across exec() which causes RDPMC to fault. - Correct the timestamp mechanics across IOC_DISABLE/ENABLE which causes incorrect timestamps and total time calculations" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Fix time on IOC_ENABLE perf/x86: Fix RDPMC vs. mm_struct tracking
2017-08-20Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "A pile of smallish changes all over the place: - Add a missing ISB in the GIC V1 driver - Remove an ACPI version check in the GIC V3 ITS driver - Add the missing irq_pm_shutdown function for BRCMSTB-L2 to avoid spurious wakeups - Remove the artifical limitation of ITS instances to the number of NUMA nodes which prevents utilizing the ITS hardware correctly - Prevent a infinite parsing loop in the GIC-V3 ITS/MSI code - Honour the force affinity argument in the GIC-V3 driver which is required to make perf work correctly - Correctly report allocation failures in GIC-V2/V3 to avoid using half allocated and initialized interrupts. - Fixup checks against nr_cpu_ids in the generic IPI code" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/ipi: Fixup checks against nr_cpu_ids genirq: Restore trigger settings in irq_modify_status() MAINTAINERS: Remove Jason Cooper's irqchip git tree irqchip/gic-v3-its-platform-msi: Fix msi-parent parsing loop irqchip/gic-v3-its: Allow GIC ITS number more than MAX_NUMNODES irqchip: brcmstb-l2: Define an irq_pm_shutdown function irqchip/gic: Ensure we have an ISB between ack and ->handle_irq irqchip/gic-v3-its: Remove ACPICA version check for ACPI NUMA irqchip/gic-v3: Honor forced affinity setting irqchip/gic-v3: Report failures in gic_irq_domain_alloc irqchip/gic-v2: Report failures in gic_irq_domain_alloc irqchip/atmel-aic: Remove root argument from ->fixup() prototype irqchip/atmel-aic: Fix unbalanced refcount in aic_common_rtc_irq_fixup() irqchip/atmel-aic: Fix unbalanced of_node_put() in aic_common_irq_fixup()
2017-08-20Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull watchdog fix from Thomas Gleixner: "A fix for the hardlockup watchdog to prevent false positives with extreme Turbo-Modes which make the perf/NMI watchdog fire faster than the hrtimer which is used to verify. Slightly larger than the minimal fix, which just would increase the hrtimer frequency, but comes with extra overhead of more watchdog timer interrupts and thread wakeups for all users. With this change we restrict the overhead to the extreme Turbo-Mode systems" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: kernel/watchdog: Prevent false positives with turbo modes
2017-08-20genirq/ipi: Fixup checks against nr_cpu_idsAlexey Dobriyan
Valid CPU ids are [0, nr_cpu_ids-1] inclusive. Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()") Fixes: f9bce791ae2a ("genirq: Add a new function to get IPI reverse mapping") Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2
2017-08-18Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "14 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm: revert x86_64 and arm64 ELF_ET_DYN_BASE base changes mm/vmalloc.c: don't unconditonally use __GFP_HIGHMEM mm/mempolicy: fix use after free when calling get_mempolicy mm/cma_debug.c: fix stack corruption due to sprintf usage signal: don't remove SIGNAL_UNKILLABLE for traced tasks. mm, oom: fix potential data corruption when oom_reaper races with writer mm: fix double mmap_sem unlock on MMF_UNSTABLE enforced SIGBUS slub: fix per memcg cache leak on css offline mm: discard memblock data later test_kmod: fix description for -s -and -c parameters kmod: fix wait on recursive loop wait: add wait_event_killable_timeout() kernel/watchdog: fix Kconfig constraints for perf hardlockup watchdog mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()
2017-08-18mm: revert x86_64 and arm64 ELF_ET_DYN_BASE base changesKees Cook
Moving the x86_64 and arm64 PIE base from 0x555555554000 to 0x000100000000 broke AddressSanitizer. This is a partial revert of: eab09532d400 ("binfmt_elf: use ELF_ET_DYN_BASE only for PIE") 02445990a96e ("arm64: move ELF_ET_DYN_BASE to 4GB / 4MB") The AddressSanitizer tool has hard-coded expectations about where executable mappings are loaded. The motivation for changing the PIE base in the above commits was to avoid the Stack-Clash CVEs that allowed executable mappings to get too close to heap and stack. This was mainly a problem on 32-bit, but the 64-bit bases were moved too, in an effort to proactively protect those systems (proofs of concept do exist that show 64-bit collisions, but other recent changes to fix stack accounting and setuid behaviors will minimize the impact). The new 32-bit PIE base is fine for ASan (since it matches the ET_EXEC base), so only the 64-bit PIE base needs to be reverted to let x86 and arm64 ASan binaries run again. Future changes to the 64-bit PIE base on these architectures can be made optional once a more dynamic method for dealing with AddressSanitizer is found. (e.g. always loading PIE into the mmap region for marked binaries.) Link: http://lkml.kernel.org/r/20170807201542.GA21271@beast Fixes: eab09532d400 ("binfmt_elf: use ELF_ET_DYN_BASE only for PIE") Fixes: 02445990a96e ("arm64: move ELF_ET_DYN_BASE to 4GB / 4MB") Signed-off-by: Kees Cook <keescook@chromium.org> Reported-by: Kostya Serebryany <kcc@google.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm/vmalloc.c: don't unconditonally use __GFP_HIGHMEMLaura Abbott
Commit 19809c2da28a ("mm, vmalloc: use __GFP_HIGHMEM implicitly") added use of __GFP_HIGHMEM for allocations. vmalloc_32 may use GFP_DMA/GFP_DMA32 which does not play nice with __GFP_HIGHMEM and will trigger a BUG in gfp_zone. Only add __GFP_HIGHMEM if we aren't using GFP_DMA/GFP_DMA32. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1482249 Link: http://lkml.kernel.org/r/20170816220705.31374-1-labbott@redhat.com Fixes: 19809c2da28a ("mm, vmalloc: use __GFP_HIGHMEM implicitly") Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.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>
2017-08-18mm/mempolicy: fix use after free when calling get_mempolicyzhong jiang
I hit a use after free issue when executing trinity and repoduced it with KASAN enabled. The related call trace is as follows. BUG: KASan: use after free in SyS_get_mempolicy+0x3c8/0x960 at addr ffff8801f582d766 Read of size 2 by task syz-executor1/798 INFO: Allocated in mpol_new.part.2+0x74/0x160 age=3 cpu=1 pid=799 __slab_alloc+0x768/0x970 kmem_cache_alloc+0x2e7/0x450 mpol_new.part.2+0x74/0x160 mpol_new+0x66/0x80 SyS_mbind+0x267/0x9f0 system_call_fastpath+0x16/0x1b INFO: Freed in __mpol_put+0x2b/0x40 age=4 cpu=1 pid=799 __slab_free+0x495/0x8e0 kmem_cache_free+0x2f3/0x4c0 __mpol_put+0x2b/0x40 SyS_mbind+0x383/0x9f0 system_call_fastpath+0x16/0x1b INFO: Slab 0xffffea0009cb8dc0 objects=23 used=8 fp=0xffff8801f582de40 flags=0x200000000004080 INFO: Object 0xffff8801f582d760 @offset=5984 fp=0xffff8801f582d600 Bytes b4 ffff8801f582d750: ae 01 ff ff 00 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ Object ffff8801f582d760: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff8801f582d770: 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkk. Redzone ffff8801f582d778: bb bb bb bb bb bb bb bb ........ Padding ffff8801f582d8b8: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ Memory state around the buggy address: ffff8801f582d600: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801f582d680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801f582d700: fc fc fc fc fc fc fc fc fc fc fc fc fb fb fb fc !shared memory policy is not protected against parallel removal by other thread which is normally protected by the mmap_sem. do_get_mempolicy, however, drops the lock midway while we can still access it later. Early premature up_read is a historical artifact from times when put_user was called in this path see https://lwn.net/Articles/124754/ but that is gone since 8bccd85ffbaf ("[PATCH] Implement sys_* do_* layering in the memory policy layer."). but when we have the the current mempolicy ref count model. The issue was introduced accordingly. Fix the issue by removing the premature release. Link: http://lkml.kernel.org/r/1502950924-27521-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: <stable@vger.kernel.org> [2.6+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm/cma_debug.c: fix stack corruption due to sprintf usagePrakash Gupta
name[] in cma_debugfs_add_one() can only accommodate 16 chars including NULL to store sprintf output. It's common for cma device name to be larger than 15 chars. This can cause stack corrpution. If the gcc stack protector is turned on, this can cause a panic due to stack corruption. Below is one example trace: Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffff8e69a75730 Call trace: dump_backtrace+0x0/0x2c4 show_stack+0x20/0x28 dump_stack+0xb8/0xf4 panic+0x154/0x2b0 print_tainted+0x0/0xc0 cma_debugfs_init+0x274/0x290 do_one_initcall+0x5c/0x168 kernel_init_freeable+0x1c8/0x280 Fix the short sprintf buffer in cma_debugfs_add_one() by using scnprintf() instead of sprintf(). Link: http://lkml.kernel.org/r/1502446217-21840-1-git-send-email-guptap@codeaurora.org Fixes: f318dd083c81 ("cma: Store a name in the cma structure") Signed-off-by: Prakash Gupta <guptap@codeaurora.org> Acked-by: Laura Abbott <labbott@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18signal: don't remove SIGNAL_UNKILLABLE for traced tasks.Jamie Iles
When forcing a signal, SIGNAL_UNKILLABLE is removed to prevent recursive faults, but this is undesirable when tracing. For example, debugging an init process (whether global or namespace), hitting a breakpoint and SIGTRAP will force SIGTRAP and then remove SIGNAL_UNKILLABLE. Everything continues fine, but then once debugging has finished, the init process is left killable which is unlikely what the user expects, resulting in either an accidentally killed init or an init that stops reaping zombies. Link: http://lkml.kernel.org/r/20170815112806.10728-1-jamie.iles@oracle.com Signed-off-by: Jamie Iles <jamie.iles@oracle.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm, oom: fix potential data corruption when oom_reaper races with writerMichal Hocko
Wenwei Tao has noticed that our current assumption that the oom victim is dying and never doing any visible changes after it dies, and so the oom_reaper can tear it down, is not entirely true. __task_will_free_mem consider a task dying when SIGNAL_GROUP_EXIT is set but do_group_exit sends SIGKILL to all threads _after_ the flag is set. So there is a race window when some threads won't have fatal_signal_pending while the oom_reaper could start unmapping the address space. Moreover some paths might not check for fatal signals before each PF/g-u-p/copy_from_user. We already have a protection for oom_reaper vs. PF races by checking MMF_UNSTABLE. This has been, however, checked only for kernel threads (use_mm users) which can outlive the oom victim. A simple fix would be to extend the current check in handle_mm_fault for all tasks but that wouldn't be sufficient because the current check assumes that a kernel thread would bail out after EFAULT from get_user*/copy_from_user and never re-read the same address which would succeed because the PF path has established page tables already. This seems to be the case for the only existing use_mm user currently (virtio driver) but it is rather fragile in general. This is even more fragile in general for more complex paths such as generic_perform_write which can re-read the same address more times (e.g. iov_iter_copy_from_user_atomic to fail and then iov_iter_fault_in_readable on retry). Therefore we have to implement MMF_UNSTABLE protection in a robust way and never make a potentially corrupted content visible. That requires to hook deeper into the PF path and check for the flag _every time_ before a pte for anonymous memory is established (that means all !VM_SHARED mappings). The corruption can be triggered artificially (http://lkml.kernel.org/r/201708040646.v746kkhC024636@www262.sakura.ne.jp) but there doesn't seem to be any real life bug report. The race window should be quite tight to trigger most of the time. Link: http://lkml.kernel.org/r/20170807113839.16695-3-mhocko@kernel.org Fixes: aac453635549 ("mm, oom: introduce oom reaper") Signed-off-by: Michal Hocko <mhocko@suse.com> Reported-by: Wenwei Tao <wenwei.tww@alibaba-inc.com> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Andrea Argangeli <andrea@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm: fix double mmap_sem unlock on MMF_UNSTABLE enforced SIGBUSMichal Hocko
Tetsuo Handa has noticed that MMF_UNSTABLE SIGBUS path in handle_mm_fault causes a lockdep splat Out of memory: Kill process 1056 (a.out) score 603 or sacrifice child Killed process 1056 (a.out) total-vm:4268108kB, anon-rss:2246048kB, file-rss:0kB, shmem-rss:0kB a.out (1169) used greatest stack depth: 11664 bytes left DEBUG_LOCKS_WARN_ON(depth <= 0) ------------[ cut here ]------------ WARNING: CPU: 6 PID: 1339 at kernel/locking/lockdep.c:3617 lock_release+0x172/0x1e0 CPU: 6 PID: 1339 Comm: a.out Not tainted 4.13.0-rc3-next-20170803+ #142 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015 RIP: 0010:lock_release+0x172/0x1e0 Call Trace: up_read+0x1a/0x40 __do_page_fault+0x28e/0x4c0 do_page_fault+0x30/0x80 page_fault+0x28/0x30 The reason is that the page fault path might have dropped the mmap_sem and returned with VM_FAULT_RETRY. MMF_UNSTABLE check however rewrites the error path to VM_FAULT_SIGBUS and we always expect mmap_sem taken in that path. Fix this by taking mmap_sem when VM_FAULT_RETRY is held in the MMF_UNSTABLE path. We cannot simply add VM_FAULT_SIGBUS to the existing error code because all arch specific page fault handlers and g-u-p would have to learn a new error code combination. Link: http://lkml.kernel.org/r/20170807113839.16695-2-mhocko@kernel.org Fixes: 3f70dc38cec2 ("mm: make sure that kthreads will not refault oom reaped memory") Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Andrea Argangeli <andrea@kernel.org> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Wenwei Tao <wenwei.tww@alibaba-inc.com> Cc: <stable@vger.kernel.org> [4.9+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18slub: fix per memcg cache leak on css offlineVladimir Davydov
To avoid a possible deadlock, sysfs_slab_remove() schedules an asynchronous work to delete sysfs entries corresponding to the kmem cache. To ensure the cache isn't freed before the work function is called, it takes a reference to the cache kobject. The reference is supposed to be released by the work function. However, the work function (sysfs_slab_remove_workfn()) does nothing in case the cache sysfs entry has already been deleted, leaking the kobject and the corresponding cache. This may happen on a per memcg cache destruction, because sysfs entries of a per memcg cache are deleted on memcg offline if the cache is empty (see __kmemcg_cache_deactivate()). The kmemleak report looks like this: unreferenced object 0xffff9f798a79f540 (size 32): comm "kworker/1:4", pid 15416, jiffies 4307432429 (age 28687.554s) hex dump (first 32 bytes): 6b 6d 61 6c 6c 6f 63 2d 31 36 28 31 35 39 39 3a kmalloc-16(1599: 6e 65 77 72 6f 6f 74 29 00 23 6b c0 ff ff ff ff newroot).#k..... backtrace: kmemleak_alloc+0x4a/0xa0 __kmalloc_track_caller+0x148/0x2c0 kvasprintf+0x66/0xd0 kasprintf+0x49/0x70 memcg_create_kmem_cache+0xe6/0x160 memcg_kmem_cache_create_func+0x20/0x110 process_one_work+0x205/0x5d0 worker_thread+0x4e/0x3a0 kthread+0x109/0x140 ret_from_fork+0x2a/0x40 unreferenced object 0xffff9f79b6136840 (size 416): comm "kworker/1:4", pid 15416, jiffies 4307432429 (age 28687.573s) hex dump (first 32 bytes): 40 fb 80 c2 3e 33 00 00 00 00 00 40 00 00 00 00 @...>3.....@.... 00 00 00 00 00 00 00 00 10 00 00 00 10 00 00 00 ................ backtrace: kmemleak_alloc+0x4a/0xa0 kmem_cache_alloc+0x128/0x280 create_cache+0x3b/0x1e0 memcg_create_kmem_cache+0x118/0x160 memcg_kmem_cache_create_func+0x20/0x110 process_one_work+0x205/0x5d0 worker_thread+0x4e/0x3a0 kthread+0x109/0x140 ret_from_fork+0x2a/0x40 Fix the leak by adding the missing call to kobject_put() to sysfs_slab_remove_workfn(). Link: http://lkml.kernel.org/r/20170812181134.25027-1-vdavydov.dev@gmail.com Fixes: 3b7b314053d02 ("slub: make sysfs file removal asynchronous") Signed-off-by: Vladimir Davydov <vdavydov.dev@gmail.com> Reported-by: Andrei Vagin <avagin@gmail.com> Tested-by: Andrei Vagin <avagin@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: <stable@vger.kernel.org> [4.12.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm: discard memblock data laterPavel Tatashin
There is existing use after free bug when deferred struct pages are enabled: The memblock_add() allocates memory for the memory array if more than 128 entries are needed. See comment in e820__memblock_setup(): * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. This memblock memory is freed here: free_low_memory_core_early() We access the freed memblock.memory later in boot when deferred pages are initialized in this path: deferred_init_memmap() for_each_mem_pfn_range() __next_mem_pfn_range() type = &memblock.memory; One possible explanation for why this use-after-free hasn't been hit before is that the limit of INIT_MEMBLOCK_REGIONS has never been exceeded at least on systems where deferred struct pages were enabled. Tested by reducing INIT_MEMBLOCK_REGIONS down to 4 from the current 128, and verifying in qemu that this code is getting excuted and that the freed pages are sane. Link: http://lkml.kernel.org/r/1502485554-318703-2-git-send-email-pasha.tatashin@oracle.com Fixes: 7e18adb4f80b ("mm: meminit: initialise remaining struct pages in parallel with kswapd") Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Steven Sistare <steven.sistare@oracle.com> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Bob Picco <bob.picco@oracle.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18test_kmod: fix description for -s -and -c parametersLuis R. Rodriguez
The descriptions were reversed, correct this. Link: http://lkml.kernel.org/r/20170809234635.13443-4-mcgrof@kernel.org Fixes: 64b671204afd71 ("test_sysctl: add generic script to expand on tests") Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Reported-by: Daniel Mentz <danielmentz@google.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Matt Redfearn <matt.redfearn@imgetc.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Michal Marek <mmarek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18kmod: fix wait on recursive loopLuis R. Rodriguez
Recursive loops with module loading were previously handled in kmod by restricting the number of modprobe calls to 50 and if that limit was breached request_module() would return an error and a user would see the following on their kernel dmesg: request_module: runaway loop modprobe binfmt-464c Starting init:/sbin/init exists but couldn't execute it (error -8) This issue could happen for instance when a 64-bit kernel boots a 32-bit userspace on some architectures and has no 32-bit binary format hanlders. This is visible, for instance, when a CONFIG_MODULES enabled 64-bit MIPS kernel boots a into o32 root filesystem and the binfmt handler for o32 binaries is not built-in. After commit 6d7964a722af ("kmod: throttle kmod thread limit") we now don't have any visible signs of an error and the kernel just waits for the loop to end somehow. Although this *particular* recursive loop could also be addressed by doing a sanity check on search_binary_handler() and disallowing a modular binfmt to be required for modprobe, a generic solution for any recursive kernel kmod issues is still needed. This should catch these loops. We can investigate each loop and address each one separately as they come in, this however puts a stop gap for them as before. Link: http://lkml.kernel.org/r/20170809234635.13443-3-mcgrof@kernel.org Fixes: 6d7964a722af ("kmod: throttle kmod thread limit") Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Reported-by: Matt Redfearn <matt.redfearn@imgtec.com> Tested-by: Matt Redfearn <matt.redfearn@imgetc.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Michal Marek <mmarek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18wait: add wait_event_killable_timeout()Luis R. Rodriguez
These are the few pending fixes I have queued up for v4.13-final. One is a a generic regression fix for recursive loops on kmod and the other one is a trivial print out correction. During the v4.13 development we assumed that recursive kmod loops were no longer possible. Clearly that is not true. The regression fix makes use of a new killable wait. We use a killable wait to be paranoid in how signals might be sent to modprobe and only accept a proper SIGKILL. The signal will only be available to userspace to issue *iff* a thread has already entered a wait state, and that happens only if we've already throttled after 50 kmod threads have been hit. Note that although it may seem excessive to trigger a failure afer 5 seconds if all kmod thread remain busy, prior to the series of changes that went into v4.13 we would actually *always* fatally fail any request which came in if the limit was already reached. The new waiting implemented in v4.13 actually gives us *more* breathing room -- the wait for 5 seconds is a wait for *any* kmod thread to finish. We give up and fail *iff* no kmod thread has finished and they're *all* running straight for 5 consecutive seconds. If 50 kmod threads are running consecutively for 5 seconds something else must be really bad. Recursive loops with kmod are bad but they're also hard to implement properly as a selftest without currently fooling current userspace tools like kmod [1]. For instance kmod will complain when you run depmod if it finds a recursive loop with symbol dependency between modules as such this type of recursive loop cannot go upstream as the modules_install target will fail after running depmod. These tests already exist on userspace kmod upstream though (refer to the testsuite/module-playground/mod-loop-*.c files). The same is not true if request_module() is used though, or worst if aliases are used. Likewise the issue with 64-bit kernels booting 32-bit userspace without a binfmt handler built-in is also currently not detected and proactively avoided by userspace kmod tools, or kconfig for all architectures. Although we could complain in the kernel when some of these individual recursive issues creep up, proactively avoiding these situations in userspace at build time is what we should keep striving for. Lastly, since recursive loops could happen with kmod it may mean recursive loops may also be possible with other kernel usermode helpers, this should be investigated and long term if we can come up with a more sensible generic solution even better! [0] https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/log/?h=20170809-kmod-for-v4.13-final [1] https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git This patch (of 3): This wait is similar to wait_event_interruptible_timeout() but only accepts SIGKILL interrupt signal. Other signals are ignored. Link: http://lkml.kernel.org/r/20170809234635.13443-2-mcgrof@kernel.org Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Matt Redfearn <matt.redfearn@imgetc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18kernel/watchdog: fix Kconfig constraints for perf hardlockup watchdogNicholas Piggin
Commit 05a4a9527931 ("kernel/watchdog: split up config options") lost the perf-based hardlockup detector's dependency on PERF_EVENTS, which can result in broken builds with some powerpc configurations. Restore the dependency. Add it in for x86 too, despite x86 always selecting PERF_EVENTS it seems reasonable to make the dependency explicit. Link: http://lkml.kernel.org/r/20170810114452.6673-1-npiggin@gmail.com Fixes: 05a4a9527931 ("kernel/watchdog: split up config options") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()Johannes Weiner
Jaegeuk and Brad report a NULL pointer crash when writeback ending tries to update the memcg stats: BUG: unable to handle kernel NULL pointer dereference at 00000000000003b0 IP: test_clear_page_writeback+0x12e/0x2c0 [...] RIP: 0010:test_clear_page_writeback+0x12e/0x2c0 Call Trace: <IRQ> end_page_writeback+0x47/0x70 f2fs_write_end_io+0x76/0x180 [f2fs] bio_endio+0x9f/0x120 blk_update_request+0xa8/0x2f0 scsi_end_request+0x39/0x1d0 scsi_io_completion+0x211/0x690 scsi_finish_command+0xd9/0x120 scsi_softirq_done+0x127/0x150 __blk_mq_complete_request_remote+0x13/0x20 flush_smp_call_function_queue+0x56/0x110 generic_smp_call_function_single_interrupt+0x13/0x30 smp_call_function_single_interrupt+0x27/0x40 call_function_single_interrupt+0x89/0x90 RIP: 0010:native_safe_halt+0x6/0x10 (gdb) l *(test_clear_page_writeback+0x12e) 0xffffffff811bae3e is in test_clear_page_writeback (./include/linux/memcontrol.h:619). 614 mod_node_page_state(page_pgdat(page), idx, val); 615 if (mem_cgroup_disabled() || !page->mem_cgroup) 616 return; 617 mod_memcg_state(page->mem_cgroup, idx, val); 618 pn = page->mem_cgroup->nodeinfo[page_to_nid(page)]; 619 this_cpu_add(pn->lruvec_stat->count[idx], val); 620 } 621 622 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, 623 gfp_t gfp_mask, The issue is that writeback doesn't hold a page reference and the page might get freed after PG_writeback is cleared (and the mapping is unlocked) in test_clear_page_writeback(). The stat functions looking up the page's node or zone are safe, as those attributes are static across allocation and free cycles. But page->mem_cgroup is not, and it will get cleared if we race with truncation or migration. It appears this race window has been around for a while, but less likely to trigger when the memcg stats were updated first thing after PG_writeback is cleared. Recent changes reshuffled this code to update the global node stats before the memcg ones, though, stretching the race window out to an extent where people can reproduce the problem. Update test_clear_page_writeback() to look up and pin page->mem_cgroup before clearing PG_writeback, then not use that pointer afterward. It is a partial revert of 62cccb8c8e7a ("mm: simplify lock_page_memcg()") but leaves the pageref-holding callsites that aren't affected alone. Link: http://lkml.kernel.org/r/20170809183825.GA26387@cmpxchg.org Fixes: 62cccb8c8e7a ("mm: simplify lock_page_memcg()") Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Jaegeuk Kim <jaegeuk@kernel.org> Tested-by: Jaegeuk Kim <jaegeuk@kernel.org> Reported-by: Bradley Bolen <bradleybolen@gmail.com> Tested-by: Brad Bolen <bradleybolen@gmail.com> Cc: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: <stable@vger.kernel.org> [4.6+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-18Merge tag 'xfs-4.13-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds
Pull xfs fixes from Darrick Wong: "A handful more bug fixes for you today. Changes since last time: - Don't leak resources when mount fails - Don't accidentally clobber variables when looking for free inodes" * tag 'xfs-4.13-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: don't leak quotacheck dquots when cow recovery xfs: clear MS_ACTIVE after finishing log recovery iomap: fix integer truncation issues in the zeroing and dirtying helpers xfs: fix inobt inode allocation search optimization
2017-08-18Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "A small set of fixes that should go into this release. This contains: - An NVMe pull request from Christoph, with a few select fixes. One of them fix a polling regression in this series, in which it's trivial to cause the kernel to disable most of the hardware queue interrupts. - Fixup for a blk-mq queue usage imbalance on request allocation, from Keith. - A xen block pull request from Konrad, fixing two issues with xen/xen-blkfront" * 'for-linus' of git://git.kernel.dk/linux-block: blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL nvme-pci: set cqe_seen on polled completions nvme-fabrics: fix reporting of unrecognized options nvmet-fc: eliminate incorrect static markers on local variables nvmet-fc: correct use after free on list teardown nvmet: don't overwrite identify sn/fr with 0-bytes xen-blkfront: use a right index when checking requests xen: fix bio vec merging blk-mq: Fix queue usage on failed request allocation
2017-08-18Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma fixes from Doug Ledford: "Fourth set of -rc fixes for 4.13 cycle. This is all of the -rc fixes that we know of. I suspect this will be the last rc pull request, but you never know, I could be wrong. Nothing major here. There are the i40iw patches I mentioned in my last pull request minus one that I pulled out because it wasn't a fix and not appropriate for the rc cycle. Then a few other items trickled in and were added to the pull request. It's fairly small aside from those five i40iw patches - Set of five i40iw fixes (the first of these is rather large by line count consideration, but I decided to send it because if fixes a legitimate issue and the line count is because it does so by creating a new function and using it where needed instead of just patching up a few lines...a smaller fix could probably be done, but the larger fix is the better code solution) - One vmw_pvrdma fix - One hns_roce fix (this silences a checker warning, but can't actually happen, I expect a patch to remove this from all drivers that share this same check in for-next) - One iw_cxgb4 fix - Two IB core fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: IB/uverbs: Fix NULL pointer dereference during device removal IB/core: Protect sysfs entry on ib_unregister_device iw_cxgb4: fix misuse of integer variable IB/hns: fix memory leak on ah on error return path i40iw: Fix potential fcn_id_array out of bounds i40iw: Use correct alignment for CQ0 memory i40iw: Fix typecast of tcp_seq_num i40iw: Correct variable names i40iw: Fix parsing of query/commit FPM buffers RDMA/vmw_pvrdma: Report CQ missed events
2017-08-18Merge tag 'powerpc-4.13-7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "A bug in the VSX register saving that could cause userspace FP/VMX register corruption. Never seen to happen (that we know of), was found by code inspection, but still tagged for stable given the consequences" * tag 'powerpc-4.13-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Fix VSX enabling/flushing to also test MSR_FP and MSR_VEC
2017-08-18Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Arnd Bergmann: "A small number of bugfixes, nothing serious this time. Here is a full list. 4.13 regression fix: - imx7d-sdb pinctrl support regressed in 4.13 due to an incomplete patch DT fixes for recently added devices: - badly copied DT entries on imx6qdl-nitrogen6_som broke PCI reset - sama5d2 memory controller had the wrong ID and registers - imx7 power domains did not work correctly with deferred probing (driver added in 4.12) - Allwinner H5 pinctrl (added in 4.12) did not work right with GPIO interrupts Fixes for older bugs that just got noticed: - i.MX25 ADC support (added in 4.6) apparently never worked right due to a missing 'ranges' property in DT. - Renesas Salvador Audio support (added in v4.5) was broken for device repeated bind/unbind due to a naming conflict. - Various allwinner boards are missing an 'ethernet' alias in DT, leading to unstable device naming. Preventive bugfix: - TI Keystone needs a fix to prevent a NULL pointer dereference with an upcoming PM change" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: soc: ti: ti_sci_pm_domains: Populate name for genpd ARM: dts: imx6qdl-nitrogen6_som2: fix PCIe reset arm64: allwinner: h5: fix pinctrl IRQs arm64: allwinner: a64: sopine: add missing ethernet0 alias arm64: allwinner: a64: pine64: add missing ethernet0 alias arm64: allwinner: a64: bananapi-m64: add missing ethernet0 alias arm64: renesas: salvator-common: avoid audio_clkout naming conflict ARM: dts: i.MX25: add ranges to tscadc soc: imx: gpcv2: fix regulator deferred probe ARM: dts: at91: sama5d2: fix EBI/NAND controllers declaration ARM: dts: at91: sama5d2: use sama5d2 compatible string for SMC ARM: dts: imx7d-sdb: Put pinctrl_spi4 in the correct location
2017-08-18Merge tag 'sound-4.13-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A collection of small fixes, mostly for regression fixes (sequencer kconfig and emu10k1 probe) and device-specific quirks (three for USB and one for HD-audio). One significant change is a fix for races in ALSA sequencer core, which covers over the previous incomplete fix" * tag 'sound-4.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: emu10k1: Fix forgotten user-copy conversion in init code ALSA: usb-audio: add DSD support for new Amanero PID ALSA: usb-audio: Add mute TLV for playback volumes on C-Media devices ALSA: usb-audio: Apply sample rate quirk to Sennheiser headset ALSA: seq: 2nd attempt at fixing race creating a queue ALSA: hda/realtek - Fix pincfg for Dell XPS 13 9370 ALSA: seq: Fix CONFIG_SND_SEQ_MIDI dependency
2017-08-18Merge tag 'dma-mapping-4.13-3' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping fix from Christoph Hellwig: "Another dma-mapping regression fix" * tag 'dma-mapping-4.13-3' of git://git.infradead.org/users/hch/dma-mapping: of: fix DMA mask generation
2017-08-18blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULLChristoph Hellwig
While pci_irq_get_affinity should never fail for SMP kernel that implement the affinity mapping, it will always return NULL in the UP case, so provide a fallback mapping of all queues to CPU 0 in that case. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-08-18Merge branch 'nvme-4.13' of git://git.infradead.org/nvme into for-linusJens Axboe
Pull NVMe changes from Christoph: "The fixes are getting really small now - two for FC, one for PCI, one for the fabrics layer and one for the target."
2017-08-18kernel/watchdog: Prevent false positives with turbo modesThomas Gleixner
The hardlockup detector on x86 uses a performance counter based on unhalted CPU cycles and a periodic hrtimer. The hrtimer period is about 2/5 of the performance counter period, so the hrtimer should fire 2-3 times before the performance counter NMI fires. The NMI code checks whether the hrtimer fired since the last invocation. If not, it assumess a hard lockup. The calculation of those periods is based on the nominal CPU frequency. Turbo modes increase the CPU clock frequency and therefore shorten the period of the perf/NMI watchdog. With extreme Turbo-modes (3x nominal frequency) the perf/NMI period is shorter than the hrtimer period which leads to false positives. A simple fix would be to shorten the hrtimer period, but that comes with the side effect of more frequent hrtimer and softlockup thread wakeups, which is not desired. Implement a low pass filter, which checks the perf/NMI period against kernel time. If the perf/NMI fires before 4/5 of the watchdog period has elapsed then the event is ignored and postponed to the next perf/NMI. That solves the problem and avoids the overhead of shorter hrtimer periods and more frequent softlockup thread wakeups. Fixes: 58687acba592 ("lockup_detector: Combine nmi_watchdog and softlockup detector") Reported-and-tested-by: Kan Liang <Kan.liang@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: dzickus@redhat.com Cc: prarit@redhat.com Cc: ak@linux.intel.com Cc: babu.moger@oracle.com Cc: peterz@infradead.org Cc: eranian@google.com Cc: acme@redhat.com Cc: stable@vger.kernel.org Cc: atomlin@redhat.com Cc: akpm@linux-foundation.org Cc: torvalds@linux-foundation.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1708150931310.1886@nanos
2017-08-18genirq: Restore trigger settings in irq_modify_status()Marc Zyngier
irq_modify_status starts by clearing the trigger settings from irq_data before applying the new settings, but doesn't restore them, leaving them to IRQ_TYPE_NONE. That's pretty confusing to the potential request_irq() that could follow. Instead, snapshot the settings before clearing them, and restore them if the irq_modify_status() invocation was not changing the trigger. Fixes: 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ") Reported-and-tested-by: jeffy <jeffy.chen@rock-chips.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170818095345.12378-1-marc.zyngier@arm.com
2017-08-18soc: ti: ti_sci_pm_domains: Populate name for genpdDave Gerlach
Commit b6a1d093f96b ("PM / Domains: Extend generic power domain debugfs") now creates a debugfs directory for each genpd based on the name of the genpd. Currently no name is given to the genpd created by ti_sci_pm_domains driver so because of this we see a NULL pointer dereferences when it is accessed on boot when the debugfs entry creation is attempted. Give the genpd a name before registering it to avoid this. Fixes: 52835d59fc6c ("soc: ti: Add ti_sci_pm_domains driver") Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-08-18Merge tag 'imx-fixes-4.13-3' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes Pull "i.MX fixes for 4.13, round 3" from Shawn Guo: - Fix PCIe reset GPIO of imx6qdl-nitrogen6_som2 board, which was a bad copy from nitrogen6_max device tree. * tag 'imx-fixes-4.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: ARM: dts: imx6qdl-nitrogen6_som2: fix PCIe reset
2017-08-18Merge tag 'sunxi-fixes-for-4.13-2' of ↵Arnd Bergmann
https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into fixes Pull "Allwinner fixes for 4.13, round 2" from Chen-Yu Tsai: Three fixes adding a missing alias for the Ethernet controller on A64 boards. One adding a missing interrupt for the pin controller. * tag 'sunxi-fixes-for-4.13-2' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux: arm64: allwinner: h5: fix pinctrl IRQs arm64: allwinner: a64: sopine: add missing ethernet0 alias arm64: allwinner: a64: pine64: add missing ethernet0 alias arm64: allwinner: a64: bananapi-m64: add missing ethernet0 alias
2017-08-18x86: Constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime and none of the groups is modified. Mark the non-const structs as const. [ tglx: Folded into one big patch ] Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: tony.luck@intel.com Cc: bp@alien8.de Link: http://lkml.kernel.org/r/1500550238-15655-2-git-send-email-arvind.yadav.cs@gmail.com
2017-08-18MAINTAINERS: Remove Jason Cooper's irqchip git treeFlorian Fainelli
Jason's irqchip tree does not seem to have been updated for many months now, remove it from the list of trees to avoid any possible confusion. Jason says: "Unfortunately, when I have time for irqchip, I don't always have the time to properly follow up with pull-requests. So, for the time being, I'll stick to reviewing as I can." Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Jason Cooper <jason@lakedaemon.net> Cc: marc.zyngier@arm.com Link: http://lkml.kernel.org/r/20170727224733.8288-1-f.fainelli@gmail.com
2017-08-18ALSA: emu10k1: Fix forgotten user-copy conversion in init codeTakashi Iwai
The commit d42fe63d5839 ("ALSA: emu10k1: Get rid of set_fs() usage") converted the user-space copy hack with set_fs() to the direct memcpy(), but one place was forgotten. This resulted in the error from snd_emu10k1_init_efx(), eventually failed to load the driver. Fix the missing piece. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196687 Fixes: d42fe63d5839 ("ALSA: emu10k1: Get rid of set_fs() usage") Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-08-18ALSA: usb-audio: add DSD support for new Amanero PIDJussi Laako
Add DSD support for new Amanero Combo384 firmware version with a new PID. This firmware uses DSD_U32_BE. Fixes: 3eff682d765b ("ALSA: usb-audio: Support both DSD LE/BE Amanero firmware versions") Signed-off-by: Jussi Laako <jussi@sonarnerd.net> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-08-18nvme-pci: set cqe_seen on polled completionsKeith Busch
Fixes: 920d13a884 ("nvme-pci: factor out the cqe reading mechanics from __nvme_process_cq") Reported-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-08-18ARM: dts: imx6qdl-nitrogen6_som2: fix PCIe resetGary Bisson
Previous value was a bad copy of nitrogen6_max device tree. Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com> Fixes: 3faa1bb2e89c ("ARM: dts: imx: add Boundary Devices Nitrogen6_SOM2 support") Cc: <stable@vger.kernel.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2017-08-17Merge tag 'drm-fixes-for-v4.13-rc6' of ↵Linus Torvalds
git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "Seems to be slowing down nicely, just one amdgpu fix, and a bunch of i915 fixes" * tag 'drm-fixes-for-v4.13-rc6' of git://people.freedesktop.org/~airlied/linux: drm/amdgpu: save list length when fence is signaled drm/i915: Avoid the gpu reset vs. modeset deadlock drm/i915: Suppress switch_mm emission between the same aliasing_ppgtt drm/i915: Return correct EDP voltage swing table for 0.85V drm/i915/cnl: Add slice and subslice information to debugfs. drm/i915: Perform an invalidate prior to executing golden renderstate drm/i915: remove unused function declaration
2017-08-17Merge tag 'pm-4.13-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fixes from Rafael Wysocki: "These fix two issues related to exposing the current CPU frequency to user space on x86. Specifics: - Disable interrupts around reading IA32_APERF and IA32_MPERF in aperfmperf_snapshot_khz() (introduced recently) to avoid excessive delays between the reads that may result from interrupt handling (Doug Smythies). - Fix the computation of the CPU frequency to be reported through the pstate_sample tracepoint in intel_pstate (Doug Smythies)" * tag 'pm-4.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: x86: Disable interrupts during MSRs reading cpufreq: intel_pstate: report correct CPU frequencies during trace
2017-08-17Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input fixes from Dmitry Torokhov. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: elan_i2c - Add antoher Lenovo ACPI ID for upcoming Lenovo NB Input: elan_i2c - add ELAN0608 to the ACPI table Input: trackpoint - assume 3 buttons when buttons detection fails
2017-08-18Merge branch 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie
into drm-fixes single amdgpu fix. * 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux: drm/amdgpu: save list length when fence is signaled
2017-08-18Merge tag 'drm-intel-fixes-2017-08-16' of ↵Dave Airlie
git://anongit.freedesktop.org/git/drm-intel into drm-fixes drm/i915 fixes for v4.13-rc6 "Chris' "drm/i915: Perform an invalidate prior to executing golden renderstate" and Daniel's "drm/i915: Avoid the gpu reset vs. modeset deadlock" seem like the most important ones. * tag 'drm-intel-fixes-2017-08-16' of git://anongit.freedesktop.org/git/drm-intel: drm/i915: Avoid the gpu reset vs. modeset deadlock drm/i915: Suppress switch_mm emission between the same aliasing_ppgtt drm/i915: Return correct EDP voltage swing table for 0.85V drm/i915/cnl: Add slice and subslice information to debugfs. drm/i915: Perform an invalidate prior to executing golden renderstate drm/i915: remove unused function declaration
2017-08-17xfs: don't leak quotacheck dquots when cow recoveryDarrick J. Wong
If we fail a mount on account of cow recovery errors, it's possible that a previous quotacheck left some dquots in memory. The bailout clause of xfs_mountfs forgets to purge these, and so we leak them. Fix that. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2017-08-17xfs: clear MS_ACTIVE after finishing log recoveryDarrick J. Wong
Way back when we established inode block-map redo log items, it was discovered that we needed to prevent the VFS from evicting inodes during log recovery because any given inode might be have bmap redo items to replay even if the inode has no link count and is ultimately deleted, and any eviction of an unlinked inode causes the inode to be truncated and freed too early. To make this possible, we set MS_ACTIVE so that inodes would not be torn down immediately upon release. Unfortunately, this also results in the quota inodes not being released at all if a later part of the mount process should fail, because we never reclaim the inodes. So, set MS_ACTIVE right before we do the last part of log recovery and clear it immediately after we finish the log recovery so that everything will be torn down properly if we abort the mount. Fixes: 17c12bcd30 ("xfs: when replaying bmap operations, don't let unlinked inodes get reaped") Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>