syzbot


kernel BUG in __ocfs2_flush_truncate_log

Status: upstream: reported C repro on 2025/03/24 18:56
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+9ff29b024b1d301f7588@syzkaller.appspotmail.com
First crash: 294d, last: 20h32m
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2025/03/27 upstream (ToT) 1a9239bb4253 C [report] unregister_netdevice: waiting for DEV to become free
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 kernel BUG in __ocfs2_flush_truncate_log origin:lts-only -1 C inconclusive 33 19h57m 189d 0/2 upstream: reported C repro on 2025/07/07 06:01
linux-5.15 kernel BUG in __ocfs2_flush_truncate_log origin:upstream -1 C 116 3d06h 484d 0/3 upstream: reported C repro on 2024/09/15 06:10

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:6012!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4425 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __ocfs2_flush_truncate_log+0xe98/0x1068 fs/ocfs2/alloc.c:6012
lr : __ocfs2_flush_truncate_log+0xe98/0x1068 fs/ocfs2/alloc.c:6012
sp : ffff800020f773e0
x29: ffff800020f775a0 x28: ffff0000cbeeb000 x27: dfff800000000000
x26: 1fffe00019c689e5 x25: ffff0000ce344f20 x24: ffff0000ce344000
x23: ffff0000e51db338 x22: ffff0000ce344f28 x21: 00000000ffffffff
x20: ffff0000eab8ba00 x19: ffff7000041eee8c x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082cf240 x15: ffff800017c65000
x14: ffff0000d3daddd8 x13: ffff0000d3dade00 x12: 0000000000ff0100
x11: ff00800009cc2514 x10: 0000000000000000 x9 : ffff800009cc2514
x8 : ffff0000d3dad340 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800018338450 x4 : 0000000000000008 x3 : ffff8000082cf2d8
x2 : 0000000000000001 x1 : 00000000ffffffff x0 : 0000000000000000
Call trace:
 __ocfs2_flush_truncate_log+0xe98/0x1068 fs/ocfs2/alloc.c:6012
 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6077
 ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:402
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x324 fs/super.c:474
 kill_block_super+0x70/0xdc fs/super.c:1470
 deactivate_locked_super+0xac/0x124 fs/super.c:332
 deactivate_super+0xe8/0x108 fs/super.c:363
 cleanup_mnt+0x37c/0x404 fs/namespace.c:1191
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198
 task_work_run+0x1ec/0x270 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x54c/0x19a8 kernel/exit.c:880
 do_group_exit+0x194/0x22c kernel/exit.c:1022
 get_signal+0x11d0/0x1310 kernel/signal.c:2871
 do_signal arch/arm64/kernel/signal.c:1081 [inline]
 do_notify_resume+0x34c/0x2b28 arch/arm64/kernel/signal.c:1134
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 17ffff12 979f82fe d4210000 979f82fc (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (231):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/16 07:20 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/11/10 17:17 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (corrupt fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/09/03 20:53 linux-6.1.y f89b6e15694c 96a211bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/03/26 01:16 linux-6.1.y 344a09659766 875573af .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/03/25 12:02 linux-6.1.y 344a09659766 875573af .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/30 12:00 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in __ocfs2_flush_truncate_log
2026/01/12 03:58 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/12 02:54 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/12 00:41 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/11 12:24 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/11 00:53 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/10 05:28 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/09 19:38 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/09 05:30 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/09 00:38 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/08 10:23 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/08 05:08 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/07 15:25 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/07 12:11 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/07 10:15 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/07 07:43 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/06 13:44 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/06 08:44 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/06 01:18 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/05 23:35 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/05 10:41 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/05 08:26 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/03 11:32 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/02 16:59 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/02 09:51 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/02 06:31 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/02 04:06 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/01 20:30 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2026/01/01 00:51 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/31 22:42 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/31 20:52 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/31 17:23 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/30 23:27 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/30 15:18 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/30 10:52 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/29 20:56 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/29 16:15 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/29 07:32 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/28 20:17 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/28 19:57 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/26 11:52 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/26 07:59 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/12/25 12:01 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
2025/03/24 18:55 linux-6.1.y 344a09659766 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in __ocfs2_flush_truncate_log
* Struck through repros no longer work on HEAD.