syzbot


BUG: Dentry still in use [unmount of ext4 loop0]

Status: upstream: reported C repro on 2020/12/15 05:47
Reported-by: syzbot+50a369594efb63aace86@syzkaller.appspotmail.com
First crash: 721d, last: 403d
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 ext4 loop0] C error 63 369d 408d 0/2 closed as dup on 2021/10/28 13:08

Sample crash report:
BUG: Dentry ffff8881e6671110{i=0,n=.index}  still in use (1) [unmount of ext4 loop0]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 304 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 304 Comm: syz-executor964 Not tainted 5.4.147-syzkaller-00039-gcbb80ec0faf2 #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 60 13 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:ffff8881dded7980 EFLAGS: 00010292
RAX: 0000000000000054 RBX: ffffffff85daa5c0 RCX: 3def14c06669ad00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881ddd6a420 R08: ffffffff814b2a4c R09: ffffed103ede9608
R10: ffffed103ede9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6671110
FS:  00007f0e92c24700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0e92c23f98 CR3: 00000001ed7e3000 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
 get_signal+0x150f/0x1e00 kernel/signal.c:2745
 do_signal+0x3b/0x580 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop arch/x86/entry/common.c:159 [inline]
 prepare_exit_to_usermode+0x207/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f0e92c98219
Code: Bad RIP value.
RSP: 002b:00007f0e92c242f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f0e92d1d3f0 RCX: 00007f0e92c98219
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0e92d1d3f8
RBP: 00007f0e92d1d3fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: e5d26e84aa4cf3c6 R14: 6e656d6572636e69 R15: 00007f0e92d1d3f8
---[ end trace 355e5f8400416a8e ]---
VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds.  Have a nice day...

Crashes (132):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-android-5-4-kasan 2021/10/28 13:56 android12-5.4 cbb80ec0faf2 be531bb4 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/28 06:14 android12-5.4 cbb80ec0faf2 be531bb4 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/28 05:42 android12-5.4 cbb80ec0faf2 be531bb4 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/27 19:13 android12-5.4 7eb444cc279e be531bb4 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/27 06:31 android12-5.4 7eb444cc279e d50eb50a .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/27 05:04 android12-5.4 7eb444cc279e d50eb50a .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/26 16:01 android12-5.4 eb4a5a5dbd5b d50eb50a .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/24 04:44 android12-5.4 eb4a5a5dbd5b 282f03fb .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/22 17:49 android12-5.4 eb4a5a5dbd5b 282f03fb .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/18 10:21 android12-5.4 73e6d86c30ee 0c5d9412 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/18 04:05 android12-5.4 73e6d86c30ee 0c5d9412 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/12 17:50 android12-5.4 23c18f1ad0fc 08362356 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/11 09:20 android12-5.4 23c18f1ad0fc 838e7e2c .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/10 09:11 android12-5.4 23c18f1ad0fc 838e7e2c .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/04 07:07 android12-5.4 1e429b8f9eb9 db0f5787 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/03 22:43 android12-5.4 1e429b8f9eb9 db0f5787 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/03 07:06 android12-5.4 1e429b8f9eb9 db0f5787 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/10/02 22:19 android12-5.4 1e429b8f9eb9 db0f5787 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/28 10:07 android12-5.4 d5fa5fb1ccb2 78494d16 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/28 05:57 android12-5.4 d52ac987ad2a 78494d16 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/22 09:44 android12-5.4 546305780d82 169724fe .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/19 11:26 android12-5.4 546305780d82 70b76c1d .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/18 03:55 android12-5.4 546305780d82 70b76c1d .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/15 21:45 android12-5.4 4614f5de0f95 07e953c1 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/13 06:10 android12-5.4 8670e680e307 3ce60af8 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/13 05:16 android12-5.4 8670e680e307 3ce60af8 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/10 19:05 android12-5.4 8670e680e307 5ae8508a .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/08 02:38 android12-5.4 8670e680e307 064c9eb7 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/07 00:40 android12-5.4 ae94e015273b 6ca60148 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/28 22:05 android12-5.4 ae94e015273b be2c130d .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/28 19:28 android12-5.4 ae94e015273b be2c130d .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/10 10:32 android12-5.4 bef9107dccf3 6972b106 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/09 16:04 android12-5.4 306607c78507 6972b106 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/07 18:46 android12-5.4 306607c78507 6972b106 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/31 18:55 android12-5.4 e7e1f9adf836 6c236867 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/26 04:33 android12-5.4 c0f594e44e6e 4d1b57d4 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/22 01:58 android12-5.4 fe8243e7f1d1 29c3f20f .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/21 09:22 android12-5.4 fe8243e7f1d1 1b201b48 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/19 14:46 android12-5.4 18f5581af79d e6a17580 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/12 22:53 android12-5.4 9c09b1ce4b07 f415556d .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/11 11:46 android12-5.4 9c09b1ce4b07 8f5a7b8c .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/10 05:12 android12-5.4 3e5f38396428 8f5a7b8c .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/07/03 11:56 android12-5.4 eaef435f4357 55aa55c2 .config log report syz C BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/01/16 18:56 android12-5.4 dc04463953b2 65a7a854 .config log report syz C
ci2-android-5-4-kasan 2020/12/15 05:46 android12-5.4 2149aa11b029 97183ed7 .config log report syz C
ci2-android-5-4-kasan 2021/09/16 01:34 android12-5.4 4614f5de0f95 07e953c1 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/09/15 23:08 android12-5.4 4614f5de0f95 07e953c1 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/25 09:12 android12-5.4 f4bf8b65e48f b599f2fc .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/08/23 00:04 android12-5.4 3ce13296e72d b599f2fc .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/06/22 11:18 android12-5.4 5c5f02c3e9a5 aba2b2fb .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/06/21 00:31 android12-5.4 5c5f02c3e9a5 aba2b2fb .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/06/16 00:50 android12-5.4 7133a44f7e88 990d3cbe .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/06/07 16:13 android12-5.4 6460775e956d e59537be .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/06/05 04:33 android12-5.4 11611d33ed17 500c2339 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/05/29 02:59 android12-5.4 766ec1256935 858ea628 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/05/05 23:25 android12-5.4 6aabee0aa2de 06c27ff5 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/04/13 07:11 android12-5.4 3c5dbcf40ba8 6a81331a .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/04/09 21:59 android12-5.4 3b217c7fd679 6a81331a .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/03/28 11:03 android12-5.4 7af03784d889 a8529b82 .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2021/02/15 07:32 android12-5.4 222714f8caee 98682e5e .config log report info BUG: Dentry still in use [unmount of ext4 loop0]
ci2-android-5-4-kasan 2020/12/30 03:43 android12-5.4 b69d75c07de5 0fa352f2 .config log report info
* Struck through repros no longer work on HEAD.