BUG: Dentry still in use [unmount of 9p 9p]

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	1088d	1126d	0/2	closed as dup on 2021/10/28 13:08
android-5-10	BUG: Dentry still in use [unmount of 9p 9p]	C	error		3	1124d	1127d	0/2	closed as dup on 2021/10/28 12:58

android-5-10

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

error

1088d

1126d

0/2

closed as dup on 2021/10/28 13:08

android-5-10

BUG: Dentry still in use [unmount of 9p 9p]

error

1124d

1127d

0/2

closed as dup on 2021/10/28 12:58


Created	Duration	User	Repo	Result
2023/04/21 11:30	16m	retest repro	android12-5.4	OK log
2023/04/21 11:30	16m	retest repro	android12-5.4	OK log
2023/04/21 11:30	44m	retest repro	android12-5.4	OK log

incfs: Can't find or create .index dir in ./file0 BUG: Dentry ffff8881e6a7caa0{i=0,n=.index} still in use (1) [unmount of 9p 9p] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 299 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 0 PID: 299 Comm: syz-executor275 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:ffff8881de08fb58 EFLAGS: 00010282 RAX: 000000000000004f RBX: ffffffff85de78e0 RCX: 27c1f4af29334600 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881de25a420 R08: ffffffff814b2a4c R09: ffffed103edc9608 R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6a7caa0 FS: 00005555562de300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3bb8382290 CR3: 00000001edc66000 CR4: 00000000003406f0 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_anon_super+0x36/0x60 fs/super.c:1108 v9fs_kill_super+0x48/0x90 fs/9p/vfs_super.c:219 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: 0033:0x7f3bb830c9a9 Code: Bad RIP value. RSP: 002b:00007ffddaf25bd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f3bb83813f0 RCX: 00007f3bb830c9a9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f3bb837be40 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3bb83813f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 ---[ end trace eedf99dc52fe48f0 ]--- VFS: Busy inodes after unmount of 9p. Self-destruct in 5 seconds. Have a nice day... 9pnet: Found fid 0 not clunked 9pnet: Found fid 1 not clunked

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Manager	Title
2021/10/23 11:24	android12-5.4	eb4a5a5dbd5b	282f03fb	.config	console log	report	syz	C		ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/03/07 07:00	android12-5.4	1bd00b1a96b5	e4b4d570	.config	console log	report	syz	C		ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/01/31 03:30	android12-5.4	1e5f5a14faba	fc9fd31e	.config	console log	report	syz	C		ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/10/16 06:45	android12-5.4	73e6d86c30ee	0c5d9412	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/10/06 16:15	android12-5.4	1e429b8f9eb9	0a63fd36	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/05/15 07:30	android12-5.4	7c784dd70490	8bdd5343	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/04/12 22:11	android12-5.4	3c5dbcf40ba8	6a81331a	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/03/28 01:19	android12-5.4	7af03784d889	a8529b82	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/03/20 12:46	android12-5.4	c2f379e025e4	e45f5621	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/02/24 23:37	android12-5.4	7ba24942b70e	fcc6d71b	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]
2021/01/31 03:12	android12-5.4	1e5f5a14faba	fc9fd31e	.config	console log	report			info	ci2-android-5-4-kasan	BUG: Dentry still in use [unmount of 9p 9p]