syzbot


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

Status: upstream: reported C repro on 2020/12/16 10:16
Reported-by: syzbot+304bc4c76f40a8a7113a@syzkaller.appspotmail.com
First crash: 721d, last: 406d
similar bugs (3):
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 371d 409d 0/2 closed as dup on 2021/10/28 13:08
android-54 BUG: Dentry still in use [unmount of ramfs ramfs] C 476 306d 628d 0/2 upstream: reported C repro on 2021/03/19 07:18
android-5-10 BUG: Dentry still in use [unmount of vfat loop0] C error 6 406d 409d 0/2 closed as dup on 2021/10/28 13:08

Sample crash report:
BUG: Dentry ffff8881e6ec5dd0{i=0,n=.incomplete}  still in use (1) [unmount of vfat loop0]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 303 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 303 Comm: syz-executor508 Not tainted 5.4.147-syzkaller-00036-geb4a5a5dbd5b #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 e0 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:ffff8881de027980 EFLAGS: 00010292
RAX: 0000000000000059 RBX: ffffffff85dc6240 RCX: 92fa51d5b5e69500
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881de7b0420 R08: ffffffff814b2a4c R09: ffffed103bc04ee9
R10: ffffed103bc04ee9 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6ec5dd0
FS:  00007f679aaba700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f679ab7f468 CR3: 00000001ed7d2000 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: 0033:0x7f679ab2e449
Code: Bad RIP value.
RSP: 002b:00007f679aaba2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f679abb34b0 RCX: 00007f679ab2e449
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f679abb34b8
RBP: 0030656c69662f2e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 6d616e74726f6873
R13: 66666f5f656d6974 R14: 6e656d6572636e69 R15: 00007f679abb34b8
---[ end trace 00354e360a9ea185 ]---
VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds.  Have a nice day...

Crashes (47):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-android-5-4-kasan 2021/10/26 10:40 android12-5.4 eb4a5a5dbd5b c1132b49 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/10/24 04:50 android12-5.4 eb4a5a5dbd5b 282f03fb .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/10/23 22:04 android12-5.4 eb4a5a5dbd5b 282f03fb .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/10/22 22:04 android12-5.4 eb4a5a5dbd5b 282f03fb .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/10/16 19:45 android12-5.4 73e6d86c30ee 0c5d9412 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/10/11 09:49 android12-5.4 23c18f1ad0fc 838e7e2c .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/09/30 19:21 android12-5.4 12806d81361b 0f01403d .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/09/30 05:58 android12-5.4 12806d81361b be530f6c .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/09/01 19:22 android12-5.4 ae94e015273b 7eb7e152 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/08/16 02:00 android12-5.4 a8f2bcabf9c5 2489ab88 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/08/13 09:44 android12-5.4 299ecc4fc137 3fd2ea69 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/08/08 17:29 android12-5.4 306607c78507 6972b106 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/07 23:09 android12-5.4 972d251662ee 95793bce .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/07 20:44 android12-5.4 972d251662ee 95793bce .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/07 02:57 android12-5.4 eaef435f4357 cca78469 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/04 21:42 android12-5.4 eaef435f4357 55aa55c2 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/01 10:52 android12-5.4 877ad62bde6f 658ebc66 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/06/28 05:26 android12-5.4 47fe7966921f 9d2ab5df .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/06/25 06:26 android12-5.4 47fe7966921f 0edbbe31 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/06/22 07:24 android12-5.4 5c5f02c3e9a5 aba2b2fb .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/06/05 13:12 android12-5.4 11611d33ed17 500c2339 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/05/29 18:05 android12-5.4 3e256ddba1ff 325a8dab .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/05/29 09:26 android12-5.4 3e256ddba1ff 858ea628 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/05/25 07:39 android12-5.4 c6775ce1621b 3c7fef33 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/04/10 13:15 android12-5.4 2c6775a89bc1 6a81331a .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/04/09 13:48 android12-5.4 b98c912db9ec 6a81331a .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/30 03:40 android12-5.4 1dc47fb418c8 6a81331a .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/28 11:54 android12-5.4 7af03784d889 a8529b82 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/27 16:48 android12-5.4 7af03784d889 a8529b82 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/27 06:51 android12-5.4 7af03784d889 a8529b82 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/24 06:30 android12-5.4 c50ff8e5608b e613994b .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/09 01:17 android12-5.4 16e1b2475015 09fbf400 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/03/03 00:04 android12-5.4 5aa479507289 e5b64d68 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/02/12 22:48 android12-5.4 57b3f4830fb6 98682e5e .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/01/19 11:35 android12-5.4 445b69a6f3d9 63631df1 .config log report syz C BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/01/13 13:08 android12-5.4 e1d2125552ac a945f0a3 .config log report syz C
ci2-android-5-4-kasan 2021/01/11 14:12 android12-5.4 c9951e5d80dd 2c1f2513 .config log report syz C
ci2-android-5-4-kasan 2021/01/05 00:37 android12-5.4 e627b02af655 2a28ff1f .config log report syz C
ci2-android-5-4-kasan 2020/12/27 12:44 android12-5.4 8657d5d6282f 821e0b09 .config log report syz C
ci2-android-5-4-kasan 2020/12/27 03:13 android12-5.4 8657d5d6282f 821e0b09 .config log report syz C
ci2-android-5-4-kasan 2020/12/23 21:52 android12-5.4 8657d5d6282f c2c1d1dd .config log report syz C
ci2-android-5-4-kasan 2020/12/18 14:44 android12-5.4 cd5f5cb9fe67 04201c06 .config log report syz C
ci2-android-5-4-kasan 2020/12/16 10:15 android12-5.4 a741f29f3ed2 649595c6 .config log report syz C
ci2-android-5-4-kasan 2021/09/30 16:31 android12-5.4 12806d81361b 0f01403d .config log report info BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/07/05 05:50 android12-5.4 eaef435f4357 55aa55c2 .config log report info BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/05/18 07:49 android12-5.4 74d682ab7415 a343ba6b .config log report info BUG: Dentry still in use [unmount of vfat loop0]
ci2-android-5-4-kasan 2021/04/03 22:36 android12-5.4 0c3abaa2a3bc 6a81331a .config log report info BUG: Dentry still in use [unmount of vfat loop0]
* Struck through repros no longer work on HEAD.