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WARNING in kill_block_super

Status: fixed on 2018/05/08 18:30
Subsystems: fuse
[Documentation on labels]
Reported-by: syzbot+5a170e19c963a2e0df79@syzkaller.appspotmail.com
Fix commit: 8e04944f0ea8 mm,vmscan: Allow preallocating memory for register_shrinker().
First crash: 2212d, last: 2194d
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[lkp-robot] 486ad79630 [ 15.532543] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004 5 (5) 2018/05/03 18:02
486ad79630 ("origin"): BUG: unable to handle kernel NULL pointer dereference at 0000000000000004 1 (1) 2018/05/03 03:47
[PATCH 4.16 00/26] 4.16.5-stable review 34 (34) 2018/04/26 06:59
WARNING in kill_block_super 7 (8) 2018/04/11 10:09
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in kill_block_super vfs cramfs hfs efs nilfs2 C 14773 409d 1833d 0/1 upstream: reported C repro on 2019/04/12 21:39

Sample crash report:
RAX: ffffffffffffffda RBX: 00007ffed0bc62a0 RCX: 0000000000442e79
RDX: 00000000004a4d6d RSI: 0000000020001740 RDI: 0000000020001780
RBP: 0000000000000000 R08: 00007ffed0bc62a0 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
R13: 0000000000000008 R14: 0000000000001380 R15: 00007ffed0bc5b38
WARNING: CPU: 1 PID: 4445 at fs/super.c:1148 kill_block_super+0xc9/0xf0 fs/super.c:1148
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4445 Comm: syzkaller195321 Not tainted 4.16.0-rc7+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x24d lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:kill_block_super+0xc9/0xf0 fs/super.c:1148
RSP: 0018:ffff8801aecc77a0 EFLAGS: 00010293
RAX: ffff8801af180040 RBX: ffff8801aede22c0 RCX: ffffffff81b31649
RDX: 0000000000000000 RSI: ffff8801b9a76478 RDI: ffff8801d5527ba0
RBP: ffff8801aecc77b8 R08: 0000000000000000 R09: 1ffff10035d98ea5
R10: ffff8801aecc7568 R11: 0000000000000001 R12: ffff8801d5527800
R13: 0000000000000000 R14: ffff8801aecc7a10 R15: ffff8801aede22c0
 fuse_kill_sb_blk+0x90/0xb0 fs/fuse/inode.c:1232
 deactivate_locked_super+0x88/0xd0 fs/super.c:312
 sget_userns+0xbda/0xe40 fs/super.c:522
 sget+0xd2/0x120 fs/super.c:557
 mount_bdev+0x109/0x370 fs/super.c:1092
 fuse_mount_blk+0x34/0x40 fs/fuse/inode.c:1219
 mount_fs+0x66/0x2d0 fs/super.c:1222
 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:2509 [inline]
 do_new_mount fs/namespace.c:2512 [inline]
 do_mount+0xea4/0x2bb0 fs/namespace.c:2842
 SYSC_mount fs/namespace.c:3058 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3035
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x442e79
RSP: 002b:00007ffed0bc59e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffed0bc62a0 RCX: 0000000000442e79
RDX: 00000000004a4d6d RSI: 0000000020001740 RDI: 0000000020001780
RBP: 0000000000000000 R08: 00007ffed0bc62a0 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
R13: 0000000000000008 R14: 0000000000001380 R15: 00007ffed0bc5b38
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (51):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/03/29 11:42 upstream 0b412605ef5f d47f0ed6 .config console log report syz C ci-upstream-kasan-gce-root
2018/04/17 00:14 upstream a27fc14219f2 b80fd3b5 .config console log report ci-upstream-kasan-gce-root
2018/04/16 18:14 upstream 60cc43fc8884 802ac912 .config console log report ci-upstream-kasan-gce-root
2018/04/16 12:32 upstream 60cc43fc8884 802ac912 .config console log report ci-upstream-kasan-gce-root
2018/04/15 02:00 upstream 18b7fd1c93e5 7a67784c .config console log report ci-upstream-kasan-gce-root
2018/04/13 22:52 upstream 1bad9ce155a7 7a67784c .config console log report ci-upstream-kasan-gce-root
2018/04/13 14:37 upstream 16e205cf42da 0a0c5db6 .config console log report ci-upstream-kasan-gce-root
2018/04/13 09:35 upstream 16e205cf42da 0a0c5db6 .config console log report ci-upstream-kasan-gce-root
2018/04/11 19:55 upstream b284d4d5a678 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/11 12:46 upstream b284d4d5a678 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/10 20:38 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/10 12:20 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce-root
2018/04/09 20:42 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/09 16:58 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce-root
2018/04/08 15:25 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/08 14:55 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/07 17:42 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 14:26 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/06 11:25 upstream 38c23685b273 4f1152d4 .config console log report ci-upstream-kasan-gce-root
2018/04/06 11:05 upstream 38c23685b273 4f1152d4 .config console log report ci-upstream-kasan-gce-root
2018/04/05 22:57 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/05 13:39 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 06:44 upstream 3e968c9f1401 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/05 00:11 upstream 3e968c9f1401 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/04 14:00 upstream 17dec0a94915 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/04 09:58 upstream 17dec0a94915 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 13:57 upstream 642e7fd23353 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 13:51 upstream 642e7fd23353 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 12:31 upstream 642e7fd23353 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 04:23 upstream 86bbbebac193 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 03:22 upstream 86bbbebac193 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/02 19:13 upstream 0adb32858b0b 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/02 14:26 upstream 0adb32858b0b dc889257 .config console log report ci-upstream-kasan-gce-root
2018/04/02 14:25 upstream 0adb32858b0b dc889257 .config console log report ci-upstream-kasan-gce-root
2018/04/01 23:05 upstream 0adb32858b0b dc889257 .config console log report ci-upstream-kasan-gce-root
2018/04/01 16:05 upstream 10b84daddbec 0a78e248 .config console log report ci-upstream-kasan-gce-root
2018/04/01 02:53 upstream 10b84daddbec 0174c6c8 .config console log report ci-upstream-kasan-gce-root
2018/04/01 00:14 upstream 10b84daddbec 0174c6c8 .config console log report ci-upstream-kasan-gce-root
2018/03/31 21:28 upstream 10b84daddbec 0174c6c8 .config console log report ci-upstream-kasan-gce-root
2018/03/31 12:48 upstream b5dbc28762fd 8fbce0e4 .config console log report ci-upstream-kasan-gce-root
2018/03/31 11:17 upstream b5dbc28762fd 8fbce0e4 .config console log report ci-upstream-kasan-gce-root
2018/03/31 09:15 upstream b5dbc28762fd 8fbce0e4 .config console log report ci-upstream-kasan-gce-root
2018/03/29 11:12 upstream 0b412605ef5f d47f0ed6 .config console log report ci-upstream-kasan-gce-root
* Struck through repros no longer work on HEAD.