1. 06 Apr, 2016 2 commits
  2. 01 Apr, 2016 1 commit
  3. 26 Mar, 2016 25 commits
  4. 25 Mar, 2016 12 commits
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 606c61a0
      Linus Torvalds authored
      Merge fourth patch-bomb from Andrew Morton:
       "A lot more stuff than expected, sorry.  A bunch of ocfs2 reviewing was
        finished off.
      
         - mhocko's oom-reaper out-of-memory-handler changes
      
         - ocfs2 fixes and features
      
         - KASAN feature work
      
         - various fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (42 commits)
        thp: fix typo in khugepaged_scan_pmd()
        MAINTAINERS: fill entries for KASAN
        mm/filemap: generic_file_read_iter(): check for zero reads unconditionally
        kasan: test fix: warn if the UAF could not be detected in kmalloc_uaf2
        mm, kasan: stackdepot implementation. Enable stackdepot for SLAB
        arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
        mm, kasan: add GFP flags to KASAN API
        mm, kasan: SLAB support
        kasan: modify kmalloc_large_oob_right(), add kmalloc_pagealloc_oob_right()
        include/linux/oom.h: remove undefined oom_kills_count()/note_oom_kill()
        mm/page_alloc: prevent merging between isolated and other pageblocks
        drivers/memstick/host/r592.c: avoid gcc-6 warning
        ocfs2: extend enough credits for freeing one truncate record while replaying truncate records
        ocfs2: extend transaction for ocfs2_remove_rightmost_path() and ocfs2_update_edge_lengths() before to avoid inconsistency between inode and et
        ocfs2/dlm: move lock to the tail of grant queue while doing in-place convert
        ocfs2: solve a problem of crossing the boundary in updating backups
        ocfs2: fix occurring deadlock by changing ocfs2_wq from global to local
        ocfs2/dlm: fix BUG in dlm_move_lockres_to_recovery_list
        ocfs2/dlm: fix race between convert and recovery
        ocfs2: fix a deadlock issue in ocfs2_dio_end_io_write()
        ...
      606c61a0
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 15dbc136
      Linus Torvalds authored
      Pull power management fixlet from Rafael Wysocki:
       "One of commits in my previous pull request changed the permissions of
        drivers/power/avs/rockchip-io-domain.c to executable by mistake"
      
      * tag 'pm+acpi-4.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        Fix permissions of drivers/power/avs/rockchip-io-domain.c
      15dbc136
    • Linus Torvalds's avatar
      Merge tag 'please-pull-preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux · dad44dec
      Linus Torvalds authored
      Pull ia64 update from Tony Luck:
       "Wire up new system calls p{read,write}v2 for ia64"
      
      * tag 'please-pull-preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
        [IA64] Enable preadv2 and pwritev2 syscalls for ia64
      dad44dec
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · c155c749
      Linus Torvalds authored
      Pull more input updates from Dmitry Torokhov:
       "Second round of updates for the input subsystem.
      
        The BYD PS/2 protocol driver now uses absolute reporting mode and
        should behave more like other touchpads; Synaptics driver needed to
        extend one of its quirks to a newer firmware version, and a few USB
        drivers got tightened up checks for the contents of their descriptors"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: sur40 - fix DMA on stack
        Input: ati_remote2 - fix crashes on detecting device with invalid descriptor
        Input: synaptics - handle spurious release of trackstick buttons, again
        Input: synaptics-rmi4 - remove check of Non-NULL array
        Input: byd - enable absolute mode
        Input: ims-pcu - sanity check against missing interfaces
        Input: melfas_mip4 - add hw_version sysfs attribute
      c155c749
    • Kirill A. Shutemov's avatar
      thp: fix typo in khugepaged_scan_pmd() · 0fda2788
      Kirill A. Shutemov authored
      !PageLRU should lead to SCAN_PAGE_LRU, not SCAN_SCAN_ABORT result.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0fda2788
    • Andrey Ryabinin's avatar
      MAINTAINERS: fill entries for KASAN · 0ba1d91d
      Andrey Ryabinin authored
      Signed-off-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
      Cc: Alexander Potapenko <glider@google.com>
      Acked-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0ba1d91d
    • Nicolai Stange's avatar
      mm/filemap: generic_file_read_iter(): check for zero reads unconditionally · e7080a43
      Nicolai Stange authored
      If
       - generic_file_read_iter() gets called with a zero read length,
       - the read offset is at a page boundary,
       - IOCB_DIRECT is not set
      -  and the page in question hasn't made it into the page cache yet,
      then do_generic_file_read() will trigger a readahead with a req_size hint
      of zero.
      
      Since roundup_pow_of_two(0) is undefined, UBSAN reports
      
        UBSAN: Undefined behaviour in include/linux/log2.h:63:13
        shift exponent 64 is too large for 64-bit type 'long unsigned int'
        CPU: 3 PID: 1017 Comm: sa1 Tainted: G L 4.5.0-next-20160318+ #14
        [...]
        Call Trace:
         [...]
         [<ffffffff813ef61a>] ondemand_readahead+0x3aa/0x3d0
         [<ffffffff813ef61a>] ? ondemand_readahead+0x3aa/0x3d0
         [<ffffffff813c73bd>] ? find_get_entry+0x2d/0x210
         [<ffffffff813ef9c3>] page_cache_sync_readahead+0x63/0xa0
         [<ffffffff813cc04d>] do_generic_file_read+0x80d/0xf90
         [<ffffffff813cc955>] generic_file_read_iter+0x185/0x420
         [...]
         [<ffffffff81510b06>] __vfs_read+0x256/0x3d0
         [...]
      
      when get_init_ra_size() gets called from ondemand_readahead().
      
      The net effect is that the initial readahead size is arch dependent for
      requested read lengths of zero: for example, since
      
        1UL << (sizeof(unsigned long) * 8)
      
      evaluates to 1 on x86 while its result is 0 on ARMv7, the initial readahead
      size becomes 4 on the former and 0 on the latter.
      
      What's more, whether or not the file access timestamp is updated for zero
      length reads is decided differently for the two cases of IOCB_DIRECT
      being set or cleared: in the first case, generic_file_read_iter()
      explicitly skips updating that timestamp while in the latter case, it is
      always updated through the call to do_generic_file_read().
      
      According to POSIX, zero length reads "do not modify the last data access
      timestamp" and thus, the IOCB_DIRECT behaviour is POSIXly correct.
      
      Let generic_file_read_iter() unconditionally check the requested read
      length at its entry and return immediately with success if it is zero.
      Signed-off-by: default avatarNicolai Stange <nicstange@gmail.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e7080a43
    • Alexander Potapenko's avatar
      kasan: test fix: warn if the UAF could not be detected in kmalloc_uaf2 · 9dcadd38
      Alexander Potapenko authored
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Acked-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Andrey Konovalov <adech.fo@gmail.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Konstantin Serebryany <kcc@google.com>
      Cc: Dmitry Chernenkov <dmitryc@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9dcadd38
    • Alexander Potapenko's avatar
      mm, kasan: stackdepot implementation. Enable stackdepot for SLAB · cd11016e
      Alexander Potapenko authored
      Implement the stack depot and provide CONFIG_STACKDEPOT.  Stack depot
      will allow KASAN store allocation/deallocation stack traces for memory
      chunks.  The stack traces are stored in a hash table and referenced by
      handles which reside in the kasan_alloc_meta and kasan_free_meta
      structures in the allocated memory chunks.
      
      IRQ stack traces are cut below the IRQ entry point to avoid unnecessary
      duplication.
      
      Right now stackdepot support is only enabled in SLAB allocator.  Once
      KASAN features in SLAB are on par with those in SLUB we can switch SLUB
      to stackdepot as well, thus removing the dependency on SLUB stack
      bookkeeping, which wastes a lot of memory.
      
      This patch is based on the "mm: kasan: stack depots" patch originally
      prepared by Dmitry Chernenkov.
      
      Joonsoo has said that he plans to reuse the stackdepot code for the
      mm/page_owner.c debugging facility.
      
      [akpm@linux-foundation.org: s/depot_stack_handle/depot_stack_handle_t]
      [aryabinin@virtuozzo.com: comment style fixes]
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Signed-off-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Andrey Konovalov <adech.fo@gmail.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Konstantin Serebryany <kcc@google.com>
      Cc: Dmitry Chernenkov <dmitryc@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      cd11016e
    • Alexander Potapenko's avatar
      arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections · be7635e7
      Alexander Potapenko authored
      KASAN needs to know whether the allocation happens in an IRQ handler.
      This lets us strip everything below the IRQ entry point to reduce the
      number of unique stack traces needed to be stored.
      
      Move the definition of __irq_entry to <linux/interrupt.h> so that the
      users don't need to pull in <linux/ftrace.h>.  Also introduce the
      __softirq_entry macro which is similar to __irq_entry, but puts the
      corresponding functions to the .softirqentry.text section.
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Acked-by: default avatarSteven Rostedt <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>
      Cc: Andrey Konovalov <adech.fo@gmail.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
      Cc: Konstantin Serebryany <kcc@google.com>
      Cc: Dmitry Chernenkov <dmitryc@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      be7635e7
    • Alexander Potapenko's avatar
      mm, kasan: add GFP flags to KASAN API · 505f5dcb
      Alexander Potapenko authored
      Add GFP flags to KASAN hooks for future patches to use.
      
      This patch is based on the "mm: kasan: unified support for SLUB and SLAB
      allocators" patch originally prepared by Dmitry Chernenkov.
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Andrey Konovalov <adech.fo@gmail.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Konstantin Serebryany <kcc@google.com>
      Cc: Dmitry Chernenkov <dmitryc@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      505f5dcb
    • Alexander Potapenko's avatar
      mm, kasan: SLAB support · 7ed2f9e6
      Alexander Potapenko authored
      Add KASAN hooks to SLAB allocator.
      
      This patch is based on the "mm: kasan: unified support for SLUB and SLAB
      allocators" patch originally prepared by Dmitry Chernenkov.
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Pekka Enberg <penberg@kernel.org>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Cc: Andrey Konovalov <adech.fo@gmail.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Konstantin Serebryany <kcc@google.com>
      Cc: Dmitry Chernenkov <dmitryc@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7ed2f9e6