1. 02 May, 2020 2 commits
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 42eb62d4
      Linus Torvalds authored
      Pull arm64 fix from Catalin Marinas:
       "Add -fasynchronous-unwind-tables to the vDSO CFLAGS"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: vdso: Add -fasynchronous-unwind-tables to cflags
      42eb62d4
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.7-2020-05-01' of git://git.kernel.dk/linux-block · cf018530
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
      
       - Fix for statx not grabbing the file table, making AT_EMPTY_PATH fail
      
       - Cover a few cases where async poll can handle retry, eliminating the
         need for an async thread
      
       - fallback request busy/free fix (Bijan)
      
       - syzbot reported SQPOLL thread exit fix for non-preempt (Xiaoguang)
      
       - Fix extra put of req for sync_file_range (Pavel)
      
       - Always punt splice async. We'll improve this for 5.8, but wanted to
         eliminate the inode mutex lock from the non-blocking path for 5.7
         (Pavel)
      
      * tag 'io_uring-5.7-2020-05-01' of git://git.kernel.dk/linux-block:
        io_uring: punt splice async because of inode mutex
        io_uring: check non-sync defer_list carefully
        io_uring: fix extra put in sync_file_range()
        io_uring: use cond_resched() in io_ring_ctx_wait_and_kill()
        io_uring: use proper references for fallback_req locking
        io_uring: only force async punt if poll based retry can't handle it
        io_uring: enable poll retry for any file with ->read_iter / ->write_iter
        io_uring: statx must grab the file table for valid fd
      cf018530
  2. 01 May, 2020 15 commits
  3. 30 Apr, 2020 14 commits
  4. 29 Apr, 2020 5 commits
  5. 28 Apr, 2020 4 commits
    • Gabriel Krisman Bertazi's avatar
      dm multipath: use updated MPATHF_QUEUE_IO on mapping for bio-based mpath · 5686dee3
      Gabriel Krisman Bertazi authored
      When adding devices that don't have a scsi_dh on a BIO based multipath,
      I was able to consistently hit the warning below and lock-up the system.
      
      The problem is that __map_bio reads the flag before it potentially being
      modified by choose_pgpath, and ends up using the older value.
      
      The WARN_ON below is not trivially linked to the issue. It goes like
      this: The activate_path delayed_work is not initialized for non-scsi_dh
      devices, but we always set MPATHF_QUEUE_IO, asking for initialization.
      That is fine, since MPATHF_QUEUE_IO would be cleared in choose_pgpath.
      Nevertheless, only for BIO-based mpath, we cache the flag before calling
      choose_pgpath, and use the older version when deciding if we should
      initialize the path.  Therefore, we end up trying to initialize the
      paths, and calling the non-initialized activate_path work.
      
      [   82.437100] ------------[ cut here ]------------
      [   82.437659] WARNING: CPU: 3 PID: 602 at kernel/workqueue.c:1624
        __queue_delayed_work+0x71/0x90
      [   82.438436] Modules linked in:
      [   82.438911] CPU: 3 PID: 602 Comm: systemd-udevd Not tainted 5.6.0-rc6+ #339
      [   82.439680] RIP: 0010:__queue_delayed_work+0x71/0x90
      [   82.440287] Code: c1 48 89 4a 50 81 ff 00 02 00 00 75 2a 4c 89 cf e9
      94 d6 07 00 e9 7f e9 ff ff 0f 0b eb c7 0f 0b 48 81 7a 58 40 74 a8 94 74
      a7 <0f> 0b 48 83 7a 48 00 74 a5 0f 0b eb a1 89 fe 4c 89 cf e9 c8 c4 07
      [   82.441719] RSP: 0018:ffffb738803977c0 EFLAGS: 00010007
      [   82.442121] RAX: ffffa086389f9740 RBX: 0000000000000002 RCX: 0000000000000000
      [   82.442718] RDX: ffffa086350dd930 RSI: ffffa0863d76f600 RDI: 0000000000000200
      [   82.443484] RBP: 0000000000000200 R08: 0000000000000000 R09: ffffa086350dd970
      [   82.444128] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa086350dd930
      [   82.444773] R13: ffffa0863d76f600 R14: 0000000000000000 R15: ffffa08636738008
      [   82.445427] FS:  00007f6abfe9dd40(0000) GS:ffffa0863dd80000(0000) knlGS:00000
      [   82.446040] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   82.446478] CR2: 0000557d288db4e8 CR3: 0000000078b36000 CR4: 00000000000006e0
      [   82.447104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   82.447561] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      [   82.448012] Call Trace:
      [   82.448164]  queue_delayed_work_on+0x6d/0x80
      [   82.448472]  __pg_init_all_paths+0x7b/0xf0
      [   82.448714]  pg_init_all_paths+0x26/0x40
      [   82.448980]  __multipath_map_bio.isra.0+0x84/0x210
      [   82.449267]  __map_bio+0x3c/0x1f0
      [   82.449468]  __split_and_process_non_flush+0x14a/0x1b0
      [   82.449775]  __split_and_process_bio+0xde/0x340
      [   82.450045]  ? dm_get_live_table+0x5/0xb0
      [   82.450278]  dm_process_bio+0x98/0x290
      [   82.450518]  dm_make_request+0x54/0x120
      [   82.450778]  generic_make_request+0xd2/0x3e0
      [   82.451038]  ? submit_bio+0x3c/0x150
      [   82.451278]  submit_bio+0x3c/0x150
      [   82.451492]  mpage_readpages+0x129/0x160
      [   82.451756]  ? bdev_evict_inode+0x1d0/0x1d0
      [   82.452033]  read_pages+0x72/0x170
      [   82.452260]  __do_page_cache_readahead+0x1ba/0x1d0
      [   82.452624]  force_page_cache_readahead+0x96/0x110
      [   82.452903]  generic_file_read_iter+0x84f/0xae0
      [   82.453192]  ? __seccomp_filter+0x7c/0x670
      [   82.453547]  new_sync_read+0x10e/0x190
      [   82.453883]  vfs_read+0x9d/0x150
      [   82.454172]  ksys_read+0x65/0xe0
      [   82.454466]  do_syscall_64+0x4e/0x210
      [   82.454828]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
      [...]
      [   82.462501] ---[ end trace bb39975e9cf45daa ]---
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
      Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
      5686dee3
    • Matt Roper's avatar
      drm/i915: Use proper fault mask in interrupt postinstall too · 8598eb78
      Matt Roper authored
      The IRQ postinstall handling had open-coded pipe fault mask selection
      that never got updated for gen11.  Switch it to use
      gen8_de_pipe_fault_mask() to ensure we don't miss updates for new
      platforms.
      
      Cc: José Roberto de Souza <jose.souza@intel.com>
      Fixes: d506a65d ("drm/i915: Catch GTT fault errors for gen11+ planes")
      Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200424231423.4065231-1-matthew.d.roper@intel.comReviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      (cherry picked from commit 869129ee)
      Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
      8598eb78
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 96c9a780
      Linus Torvalds authored
      Pull vfs fixes from Al Viro:
       "Two old bugs..."
      
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        propagate_one(): mnt_set_mountpoint() needs mount_lock
        dlmfs_file_write(): fix the bogosity in handling non-zero *ppos
      96c9a780
    • David Howells's avatar
      Fix use after free in get_tree_bdev() · dd7bc815
      David Howells authored
      Commit 6fcf0c72, a fix to get_tree_bdev() put a missing blkdev_put() in
      the wrong place, before a warnf() that displays the bdev under
      consideration rather after it.
      
      This results in a silent lockup in printk("%pg") called via warnf() from
      get_tree_bdev() under some circumstances when there's a race with the
      blockdev being frozen.  This can be caused by xfstests/tests/generic/085 in
      combination with Lukas Czerner's ext4 mount API conversion patchset.  It
      looks like it ought to occur with other users of get_tree_bdev() such as
      XFS, but apparently doesn't.
      
      Fix this by switching the order of the lines.
      
      Fixes: 6fcf0c72 ("vfs: add missing blkdev_put() in get_tree_bdev()")
      Reported-by: default avatarLukas Czerner <lczerner@redhat.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      cc: Ian Kent <raven@themaw.net>
      cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dd7bc815