BUG: Dentry still in use [unmount of msdos loop2]

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-54	BUG: Dentry still in use [unmount of msdos loop2] (2)				1	1229d	1229d	0/2	auto-closed as invalid on 2021/11/09 22:28

BUG: Dentry ffff88819e25e330{i=0,n=.index}  still in use (2) [unmount of msdos loop2]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12959 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 12959 Comm: syz-executor.2 Not tainted 5.4.105-syzkaller-00511-g6ede59f3f8d0 #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 ec e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 e9 af 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:ffff8881a307fc58 EFLAGS: 00010282
RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 27f7476c00f7b400
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881e8f32420 R08: ffffffff814e8047 R09: ffffed103edc5e08
R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffff88819e25e330
FS:  0000000002d03400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd9277bd98 CR3: 00000001a8999000 CR4: 00000000001406f0
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+0x1b3/0x270 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4673c7
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9277c4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004673c7
RDX: 00007ffd9277c5aa RSI: 0000000000000002 RDI: 00007ffd9277c5a0
RBP: 00007ffd9277c5a0 R08: 00000000ffffffff R09: 00007ffd9277c370
R10: 0000000002d04b63 R11: 0000000000000246 R12: 00000000004beb82
R13: 00007ffd9277d670 R14: 0000000002d04b00 R15: 00007ffd9277d6b0
---[ end trace e01e83ba3aeedbd8 ]---
BUG: Dentry ffff88819e25e330{i=0,n=.index}  still in use (2) [unmount of msdos loop2]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 12959 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 12959 Comm: syz-executor.2 Tainted: G        W         5.4.105-syzkaller-00511-g6ede59f3f8d0 #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 ec e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 e9 af 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:ffff8881a307fc58 EFLAGS: 00010282
RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 27f7476c00f7b400
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffff8881e8f32420 R08: ffffffff814e8047 R09: ffffed103ede5e08
R10: ffffed103ede5e08 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffff88819e25e330
FS:  0000000002d03400(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002509b78 CR3: 00000001a8999000 CR4: 00000000001406e0
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+0x1b3/0x270 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4673c7
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9277c4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004673c7
RDX: 00007ffd9277c5aa RSI: 0000000000000002 RDI: 00007ffd9277c5a0
RBP: 00007ffd9277c5a0 R08: 00000000ffffffff R09: 00007ffd9277c370
R10: 0000000002d04b63 R11: 0000000000000246 R12: 00000000004beb82
R13: 00007ffd9277d670 R14: 0000000002d04b00 R15: 00007ffd9277d6b0
---[ end trace e01e83ba3aeedbd9 ]---
VFS: Busy inodes after unmount of loop2. Self-destruct in 5 seconds.  Have a nice day...
BUG: Dentry ffff8881dfb27bb0{i=0,n=.index}  still in use (1) [unmount of msdos loop2]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12959 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 12959 Comm: syz-executor.2 Tainted: G        W         5.4.105-syzkaller-00511-g6ede59f3f8d0 #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 ec e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 e9 af 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:ffff8881a307fc58 EFLAGS: 00010282
RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 27f7476c00f7b400
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881f53e6420 R08: ffffffff814e8047 R09: ffffed103edc5e08
R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881dfb27bb0
FS:  0000000002d03400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000140 CR3: 00000001a8999000 CR4: 00000000001406f0
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+0x1b3/0x270 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4673c7
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9277c4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004673c7
RDX: 00007ffd9277c5aa RSI: 0000000000000002 RDI: 00007ffd9277c5a0
RBP: 00007ffd9277c5a0 R08: 00000000ffffffff R09: 00007ffd9277c370
R10: 0000000002d04b63 R11: 0000000000000246 R12: 00000000004beb82
R13: 00007ffd9277d670 R14: 0000000002d04b00 R15: 00007ffd9277d6b0
---[ end trace e01e83ba3aeedbda ]---
BUG: Dentry ffff8881dfb27bb0{i=0,n=.index}  still in use (1) [unmount of msdos loop2]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12959 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 12959 Comm: syz-executor.2 Tainted: G        W         5.4.105-syzkaller-00511-g6ede59f3f8d0 #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 ec e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 e9 af 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:ffff8881a307fc58 EFLAGS: 00010282
RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 27f7476c00f7b400
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffff8881f53e6420 R08: ffffffff814e8047 R09: ffffed103edc5e08
R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881dfb27bb0
FS:  0000000002d03400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd5e1b4648 CR3: 00000001a8999000 CR4: 00000000001406f0
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+0x1b3/0x270 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4673c7
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9277c4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004673c7
RDX: 00007ffd9277c5aa RSI: 0000000000000002 RDI: 00007ffd9277c5a0
RBP: 00007ffd9277c5a0 R08: 00000000ffffffff R09: 00007ffd9277c370
R10: 0000000002d04b63 R11: 0000000000000246 R12: 00000000004beb82
R13: 00007ffd9277d670 R14: 0000000002d04b00 R15: 00007ffd9277d6b0
---[ end trace e01e83ba3aeedbdb ]---
VFS: Busy inodes after unmount of loop2. Self-destruct in 5 seconds.  Have a nice day...

Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2021/03/14 16:15	android12-5.4	6ede59f3f8d0	4a003785	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/03/03 13:17	android12-5.4	a8baa288543d	e5b64d68	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/03/01 15:23	android12-5.4	51f76f06a74d	4c37c133	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/02/24 23:48	android12-5.4	7ba24942b70e	fcc6d71b	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/02/08 18:48	android12-5.4	7a1cafd7d4ac	2ce644fc	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/01/27 15:09	android12-5.4	3bd26bb0aaee	a0ebf917	.config	console log	report	info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of msdos loop2]
2021/01/05 02:20	android12-5.4	e627b02af655	2a28ff1f	.config	console log	report	info	ci2-android-5-4-kasan