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WARNING in cleanup_mnt (4)

Status: closed as invalid on 2025/02/23 16:31
Subsystems: fs
[Documentation on labels]
First crash: 103d, last: 54d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in cleanup_mnt (5) fs 2 10d 11d 0/28 moderation: reported on 2025/03/01 10:11
upstream WARNING in cleanup_mnt (3) fs 17 233d 296d 0/28 auto-obsoleted due to no activity on 2024/09/18 11:06
upstream WARNING in cleanup_mnt (2) fs 1 1611d 1610d 0/28 auto-closed as invalid on 2021/02/09 13:15
upstream WARNING in cleanup_mnt fs 6 2106d 2210d 0/28 auto-closed as invalid on 2019/10/25 08:43
linux-4.19 WARNING in cleanup_mnt 1 1055d 1055d 0/1 auto-closed as invalid on 2022/08/19 13:11

Sample crash report:
R13: 0000000000000000 R14: 00007f5d8f975fa0 R15: 00007fff458bd008
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6678 at fs/namespace.c:1364 cleanup_mnt+0x482/0x4b0 fs/namespace.c:1364
Modules linked in:
CPU: 0 UID: 0 PID: 6678 Comm: syz.3.178 Not tainted 6.13.0-rc6-syzkaller-00046-g0b7958fa05d5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:cleanup_mnt+0x482/0x4b0 fs/namespace.c:1364
Code: 48 c7 c6 70 1f 22 82 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9e 1c 63 ff e8 99 65 7d ff e9 c6 fc ff ff e8 8f 65 7d ff 90 <0f> 0b 90 e9 d5 fc ff ff e8 81 65 7d ff 48 89 ef e8 f9 10 06 00 e9
RSP: 0018:ffffc9001e1d7988 EFLAGS: 00010293
RAX: ffffffff82221e91 RBX: 0000000000000002 RCX: ffff888024fa0000
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000000
RBP: ffff88807e6a2fc0 R08: ffffffff82221b5c R09: 1ffffffff203303e
R10: dffffc0000000000 R11: ffffffff822219e0 R12: 0000000000000010
R13: 1ffff1100fcd4602 R14: 0000607f47673504 R15: ffff88807e6a3010
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f82aedbb5e8 CR3: 000000003275c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 task_work_run+0x251/0x310 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa2a/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16b2/0x1750 kernel/signal.c:3017
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d8f785d29
Code: Unable to access opcode bytes at 0x7f5d8f785cff.
RSP: 002b:00007f5d9066c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f5d8f975fa8 RCX: 00007f5d8f785d29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5d8f975fa8
RBP: 00007f5d8f975fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5d8f975fac
R13: 0000000000000000 R14: 00007fff458bcf20 R15: 00007fff458bd008
 </TASK>

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/09 04:52 upstream 0b7958fa05d5 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in cleanup_mnt
2025/01/04 12:38 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in cleanup_mnt
2024/12/27 07:23 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in cleanup_mnt
2025/01/16 22:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in cleanup_mnt
2024/11/28 22:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7b1d1d4cfac0 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in cleanup_mnt
* Struck through repros no longer work on HEAD.