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BUG: Dentry still in use [unmount of msdos loop0]

Status: auto-obsoleted due to no activity on 2023/04/24 16:49
Reported-by: syzbot+96a9d6088cf3f261f312@syzkaller.appspotmail.com
First crash: 1418d, last: 1123d
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: Dentry still in use [unmount of msdos loop0] C error 1 1123d 1123d 0/2 closed as dup on 2021/10/28 13:08
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2023/04/24 16:26 22m retest repro android12-5.4 OK log
2023/04/24 13:23 22m retest repro android12-5.4 OK log
2023/04/24 13:23 20m retest repro android12-5.4 OK log
2023/04/24 13:23 19m retest repro android12-5.4 OK log
2023/04/24 13:23 16m retest repro android12-5.4 OK log
2023/04/24 13:23 16m retest repro android12-5.4 OK log
2023/04/24 12:27 17m retest repro android12-5.4 OK log
2023/04/24 12:27 16m retest repro android12-5.4 OK log
2023/04/24 12:27 15m retest repro android12-5.4 OK log
2023/04/24 12:27 14m retest repro android12-5.4 OK log

Sample crash report:
incfs: Can't find or create .index dir in ./file0
BUG: Dentry ffff8881e72e5cc0{i=0,n=.index}  still in use (1) [unmount of msdos loop0]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 300 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 300 Comm: syz-executor694 Not tainted 5.4.147-syzkaller-00038-g7eb444cc279e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588
Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 14 c9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 0e b3 ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff
RSP: 0018:ffff8881de537b78 EFLAGS: 00010286
RAX: 0000000000000055 RBX: ffffffff85dc6560 RCX: 1cfdcc30d295e900
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881de74e420 R08: ffffffff814b2a4c R09: ffffed103bca6f27
R10: ffffed103bca6f27 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e72e5cc0
FS:  0000555555a0b300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdea85181d0 CR3: 00000001ed55b000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 d_walk+0x2d9/0x540 fs/dcache.c:1307
 do_one_tree fs/dcache.c:1604 [inline]
 shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620
 generic_shutdown_super+0x63/0x2a0 fs/super.c:447
 kill_block_super+0x79/0xd0 fs/super.c:1444
 deactivate_locked_super+0xaf/0x100 fs/super.c:335
 deactivate_super+0x168/0x210 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xc0a/0x2aa0 kernel/exit.c:812
 do_group_exit+0x15c/0x2c0 kernel/exit.c:910
 __do_sys_exit_group+0x13/0x20 kernel/exit.c:921
 __se_sys_exit_group+0x10/0x10 kernel/exit.c:919
 __x64_sys_exit_group+0x37/0x40 kernel/exit.c:919
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fdea84a2fb9
Code: Bad RIP value.
RSP: 002b:00007ffd3a079cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fdea8517330 RCX: 00007fdea84a2fb9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fdea8511e40
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdea8517330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
---[ end trace d9a103e0d6395cb2 ]---

Crashes (36):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/10/27 07:01 android12-5.4 7eb444cc279e d50eb50a .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/09/25 09:59 android12-5.4 1a97657426d5 8cac236e .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/08/16 02:53 android12-5.4 a8f2bcabf9c5 2489ab88 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/08/09 03:42 android12-5.4 306607c78507 6972b106 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/08/05 14:36 android12-5.4 e7e1f9adf836 7f7bb950 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/08/04 20:06 android12-5.4 e7e1f9adf836 b97d64c9 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/07/07 23:30 android12-5.4 972d251662ee 95793bce .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/07/05 01:33 android12-5.4 eaef435f4357 55aa55c2 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/05/23 21:08 android12-5.4 c6775ce1621b 3c7fef33 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/24 23:22 android12-5.4 aa0556d71ff1 17f0b706 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/24 23:00 android12-5.4 aa0556d71ff1 17f0b706 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/24 16:34 android12-5.4 aa0556d71ff1 17f0b706 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/24 16:33 android12-5.4 aa0556d71ff1 17f0b706 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/09 21:46 android12-5.4 3b217c7fd679 6a81331a .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/04/02 15:54 android12-5.4 708026dc169c 6a81331a .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/28 11:23 android12-5.4 7af03784d889 a8529b82 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/27 16:16 android12-5.4 7af03784d889 a8529b82 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/26 20:49 android12-5.4 7af03784d889 a8529b82 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/23 12:27 android12-5.4 c50ff8e5608b 8092f30d .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/23 06:52 android12-5.4 c50ff8e5608b 8092f30d .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/18 18:18 android12-5.4 3941336d0e38 7216542e .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/14 23:45 android12-5.4 6ede59f3f8d0 cc1cff8f .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/14 22:33 android12-5.4 6ede59f3f8d0 cc1cff8f .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/14 16:37 android12-5.4 6ede59f3f8d0 4a003785 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/06 22:23 android12-5.4 1bd00b1a96b5 e4b4d570 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/03 13:47 android12-5.4 a8baa288543d e5b64d68 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/01 15:45 android12-5.4 51f76f06a74d 4c37c133 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/03/01 00:11 android12-5.4 51f76f06a74d 4c37c133 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/02/25 00:06 android12-5.4 7ba24942b70e fcc6d71b .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/02/22 15:34 android12-5.4 6228b4887854 c26fb06b .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/02/21 21:25 android12-5.4 35f4b1b90596 a659b3f1 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/02/14 17:55 android12-5.4 0cd79a8750fa 98682e5e .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/02/08 19:06 android12-5.4 7a1cafd7d4ac 2ce644fc .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/01/22 10:38 android12-5.4 15cec007c4a8 d4f4eca5 .config console log report syz C ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
2021/01/05 02:41 android12-5.4 e627b02af655 2a28ff1f .config console log report syz C ci2-android-5-4-kasan
2021/04/24 03:40 android12-5.4 aa0556d71ff1 17f0b706 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of msdos loop0]
* Struck through repros no longer work on HEAD.