WARNING in ovl_dir_modified

Status: premoderation: reported C repro on 2025/06/20 18:31
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+5bbd3a226f17c06c21f8@syzkaller.appspotmail.com
First crash: 449d, last: 4h40m
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/06/29 android16-6.12 (ToT) 68f4f0b0690a C [report] WARNING in ovl_dir_modified
2025/06/29 lts (merge base) e0e2f7824338 C Didn't crash
2025/06/29 upstream (ToT) afa9a6f4f574 C Didn't crash
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/12/02 18:36 4m retest repro android16-6.12 error
2025/12/02 09:13 3m retest repro android16-6.12 error
2025/12/02 09:13 10m retest repro android16-6.12 error
2025/12/02 09:13 11m retest repro android16-6.12 error
2025/12/02 09:13 3m retest repro android16-6.12 error
2025/12/02 09:13 12m retest repro android16-6.12 error

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 313 at fs/overlayfs/util.c:605 ovl_dir_version_inc fs/overlayfs/util.c:605 [inline]
WARNING: CPU: 0 PID: 313 at fs/overlayfs/util.c:605 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:623
Modules linked in:
CPU: 0 UID: 0 PID: 313 Comm: syz-executor397 Not tainted syzkaller #0 1f46b48b3a0ef7537d643c2c4b1d5e30032b8167
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:605 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:623
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 9e 70 97 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 16 96 3e ff <0f> 0b e9 3e ff ff ff e8 0a 96 3e ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc9000121f9e8 EFLAGS: 00010293
RAX: ffffffff8248e14a RBX: 0000000000000000 RCX: ffff888121954c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000121fa10 R08: ffff8881240bf37f R09: 1ffff11024817e6f
R10: dffffc0000000000 R11: ffffed1024817e70 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881240bf2e0 R15: ffff88811d6ddbb0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5d7ad0bbc CR3: 000000010c716000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x824/0xd10 fs/overlayfs/dir.c:912
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3de/0x560 fs/namei.c:4348
 incfs_kill_sb+0x102/0x220 fs/incfs/vfs.c:1968
 deactivate_locked_super+0xd5/0x270 fs/super.c:478
 deactivate_super+0xb8/0xe0 fs/super.c:511
 cleanup_mnt+0x438/0x4d0 fs/namespace.c:1380
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1387
 task_work_run+0x1e5/0x260 kernel/task_work.c:246
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa46/0x2850 kernel/exit.c:955
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1098
 __do_sys_exit_group kernel/exit.c:1109 [inline]
 __se_sys_exit_group kernel/exit.c:1107 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1107
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fe5d7a67cc5
Code: Unable to access opcode bytes at 0x7fe5d7a67c9b.
RSP: 002b:00007ffe2043d038 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe5d7a67cc5
RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fe5d7b01100 R14: 00007fe5d7b033a8 R15: 00007fe5d7b033c0
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 313 at fs/overlayfs/util.c:605 ovl_dir_version_inc fs/overlayfs/util.c:605 [inline]
WARNING: CPU: 0 PID: 313 at fs/overlayfs/util.c:605 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:623
Modules linked in:
CPU: 0 UID: 0 PID: 313 Comm: syz-executor397 Tainted: G        W          syzkaller #0 1f46b48b3a0ef7537d643c2c4b1d5e30032b8167
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:605 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:623
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 9e 70 97 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 16 96 3e ff <0f> 0b e9 3e ff ff ff e8 0a 96 3e ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc9000121f9e8 EFLAGS: 00010293
RAX: ffffffff8248e14a RBX: 0000000000000000 RCX: ffff888121954c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000121fa10 R08: ffff8881240bf37f R09: 1ffff11024817e6f
R10: dffffc0000000000 R11: ffffed1024817e70 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881240bf2e0 R15: ffff88811d6ddbb0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5d7ad0bbc CR3: 000000010c76e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x824/0xd10 fs/overlayfs/dir.c:912
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3de/0x560 fs/namei.c:4348
 incfs_kill_sb+0x197/0x220 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x270 fs/super.c:478
 deactivate_super+0xb8/0xe0 fs/super.c:511
 cleanup_mnt+0x438/0x4d0 fs/namespace.c:1380
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1387
 task_work_run+0x1e5/0x260 kernel/task_work.c:246
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa46/0x2850 kernel/exit.c:955
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1098
 __do_sys_exit_group kernel/exit.c:1109 [inline]
 __se_sys_exit_group kernel/exit.c:1107 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1107
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fe5d7a67cc5
Code: Unable to access opcode bytes at 0x7fe5d7a67c9b.
RSP: 002b:00007ffe2043d038 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe5d7a67cc5
RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fe5d7b01100 R14: 00007fe5d7b033a

Crashes (54670):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/05 11:09 android16-6.12 4e585dd7f3b7 4f7b22a0 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/07/06 06:26 android16-6.12 26ae30f2807e fcece630 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/05/27 04:03 android16-6.12 ad34d1539656 2b01f00e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/02/16 03:20 android16-6.12 837ec018b485 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/02/10 06:30 android16-6.12 3b54985e1263 4ab09a02 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/02/10 05:37 android16-6.12 3b54985e1263 4ab09a02 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/02/10 04:43 android16-6.12 3b54985e1263 4ab09a02 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/02/10 03:52 android16-6.12 3b54985e1263 4ab09a02 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/01/29 17:09 android16-6.12 6acc5550e55c aeb6fdd5 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/10/21 16:32 android16-6.12 0d6730ee6542 9832ed61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/09/16 17:33 android16-6.12 ef71e857711e e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/07/17 06:38 android16-6.12 3bff0858a069 44f8051e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/07/07 03:31 android16-6.12 e2bf362ee23b 4f67c4ae .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/06/20 21:09 android16-6.12 6c1c18fcb8b7 804b3919 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2025/06/20 19:57 android16-6.12 6c1c18fcb8b7 804b3919 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 18:26 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 16:32 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 14:25 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 12:47 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 09:45 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 08:10 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/12 07:56 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 23:52 android16-6.12 37fc3d36e6e2 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 20:49 android16-6.12 37fc3d36e6e2 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 18:04 android16-6.12 37fc3d36e6e2 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 15:24 android16-6.12 37fc3d36e6e2 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 14:16 android16-6.12 37fc3d36e6e2 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 05:34 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 04:16 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 03:15 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 02:45 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/11 01:22 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 23:15 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 21:38 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 19:40 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 18:32 android16-6.12 de3d34623482 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 17:07 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 14:57 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 13:00 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 12:00 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 10:54 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 09:54 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 07:58 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 06:19 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 05:12 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 04:24 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 03:15 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 00:58 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/10 00:53 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 21:10 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 21:01 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 20:56 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 12:50 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 08:58 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/09 03:22 android16-6.12 136b3cf43ec1 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 23:09 android16-6.12 136b3cf43ec1 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 20:48 android16-6.12 136b3cf43ec1 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 15:34 android16-6.12 136b3cf43ec1 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 13:25 android16-6.12 136b3cf43ec1 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 12:06 android16-6.12 136b3cf43ec1 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 08:44 android16-6.12 e0485c4d49da 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
2026/09/08 07:39 android16-6.12 e0485c4d49da 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in ovl_dir_modified
* Struck through repros no longer work on HEAD.