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: 66d, last: 2d23h
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in cleanup_mnt (2) fs 1 1378d 1376d 0/27 auto-closed as invalid on 2021/02/09 13:15
upstream WARNING in cleanup_mnt fs 6 1872d 1977d 0/27 auto-closed as invalid on 2019/10/25 08:43
linux-4.19 WARNING in cleanup_mnt 1 822d 822d 0/1 auto-closed as invalid on 2022/08/19 13:11

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5105 at fs/namespace.c:1364 cleanup_mnt+0x482/0x4b0 fs/namespace.c:1364
Modules linked in:
CPU: 1 PID: 5105 Comm: syz-executor Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:cleanup_mnt+0x482/0x4b0 fs/namespace.c:1364
Code: 48 c7 c6 80 26 18 82 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8e 70 64 ff e8 69 36 7e ff e9 c6 fc ff ff e8 5f 36 7e ff 90 <0f> 0b 90 e9 d5 fc ff ff e8 51 36 7e ff 48 89 ef e8 79 ef 05 00 e9
RSP: 0018:ffffc900030e7da8 EFLAGS: 00010293
RAX: ffffffff821825a1 RBX: 0000000000000002 RCX: ffff88802865bc00
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000000
RBP: ffff888017f36a80 R08: ffffffff8218226c R09: 1ffffffff1f5ce45
R10: dffffc0000000000 R11: ffffffff821820f0 R12: 0000000000000006
R13: 1ffff11002fe6d5a R14: 0000607f4686b564 R15: ffff888017f36ad0
FS:  0000555578de7500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f52349f1fe4 CR3: 0000000065ac8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 task_work_run+0x251/0x310 kernel/task_work.c:222
 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+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff301776e87
Code: a8 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcacf343b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff301776e87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcacf34470
RBP: 00007ffcacf34470 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcacf35530
R13: 00007ff3017e344c R14: 000000000001898e R15: 00000000000187d6
 </TASK>

Crashes (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/18 17:11 upstream b1bc554e009e 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in cleanup_mnt
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
2024/06/25 02:36 upstream 626737a5791b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/22 17:48 upstream 35bb670d65fc c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/15 22:37 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/15 16:46 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cleanup_mnt
2024/06/14 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.