syzbot


WARNING in cleanup_mnt (3)

Status: moderation: reported on 2024/05/19 23:59
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+96de35645722f82062b1@syzkaller.appspotmail.com
First crash: 30d, last: 9h48m
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in cleanup_mnt (2) fs 1 1341d 1339d 0/27 auto-closed as invalid on 2021/02/09 13:15
upstream WARNING in cleanup_mnt fs 6 1836d 1940d 0/27 auto-closed as invalid on 2019/10/25 08:43
linux-4.19 WARNING in cleanup_mnt 1 785d 785d 0/1 auto-closed as invalid on 2022/08/19 13:11

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 2 PID: 8076 at fs/namespace.c:1258 cleanup_mnt+0x397/0x450 fs/namespace.c:1258
Modules linked in:
CPU: 2 PID: 8076 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00269-g96e09b8f8166 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:cleanup_mnt+0x397/0x450 fs/namespace.c:1258
Code: 03 38 d0 7c 08 84 d2 0f 85 b1 00 00 00 c7 83 3c 01 00 00 00 00 00 00 48 89 df e8 f4 ee ff ff e9 34 fe ff ff e8 7a 90 8a ff 90 <0f> 0b 90 e9 8e fc ff ff e8 6c 90 8a ff 4c 89 ef e8 24 2b 07 00 e9
RSP: 0018:ffffc90005fefe28 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff82035105
RDX: ffff888024be4880 RSI: ffffffff82035476 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888024be51e8
R13: ffff888064582fc0 R14: ffffed100497ca3d R15: ffff888064583000
FS:  00005555920ea480(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555920f3938 CR3: 000000003a200000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f938e07e217
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff3ea1ce18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f938e07e217
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff3ea1ced0
RBP: 00007fff3ea1ced0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff3ea1df90
R13: 00007f938e0c8336 R14: 000000000004d585 R15: 000000000000001e
 </TASK>

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/07 23:13 upstream 96e09b8f8166 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in cleanup_mnt
2024/06/14 18:46 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/12 14:49 upstream 2ef5971ff345 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/03 10:27 upstream c3f38fa61af7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/01 23:35 upstream ec9eeb89e60d c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/29 03:24 upstream e0cce98fe279 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/26 23:45 upstream c13320499ba0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/26 07:19 upstream 54f71b0369c9 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/24 08:20 upstream 6d69b6c12fce c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/22 19:13 upstream 29c73fc794c8 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/05/15 23:55 upstream 33e02dc69afb ef5d53ed .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
* Struck through repros no longer work on HEAD.