BUG: Dentry still in use [unmount of devpts devpts]

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
BUG: Dentry still in use [unmount of ramfs ramfs]	C	error		3	1127d	1128d

error

1127d

1128d

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-54	BUG: Dentry still in use [unmount of devpts devpts]	C			11	1136d	1432d	0/2	auto-obsoleted due to no activity on 2023/04/23 21:03
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

BUG: Dentry ffff888119adf770{i=0,n=.index} still in use (1) [unmount of devpts devpts] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1316 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 1316 Comm: syz-executor.1 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90005c67c68 EFLAGS: 00010282 RAX: 0000000000000057 RBX: ffffffff866730c0 RCX: ea9e27bc433c3400 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90005c67c98 R08: ffffffff81545368 R09: ffffed103ee095d8 R10: ffffed103ee095d8 R11: 0000000000000000 R12: ffff888119adf770 R13: dffffc0000000000 R14: ffff88810c24e3f8 R15: 0000000000000001 FS: 00005555558d2400(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f25d126e343 CR3: 0000000150cda000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x75/0xa0 fs/super.c:1117 devpts_kill_sb+0x61/0x70 fs/devpts/inode.c:515 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6d2042ea7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 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:00007ffdf3bcca48 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb6d2042ea7 RDX: 00007ffdf3bccb1c RSI: 0000000000000002 RDI: 00007ffdf3bccb10 RBP: 00007ffdf3bccb10 R08: 00000000ffffffff R09: 00007ffdf3bcc8e0 R10: 00005555558d3b83 R11: 0000000000000206 R12: 00007fb6d209b035 R13: 00007ffdf3bcdbd0 R14: 00005555558d3b00 R15: 00007ffdf3bcdc10 ---[ end trace 0c697c6dbf6663d5 ]--- VFS: Busy inodes after unmount of devpts. Self-destruct in 5 seconds. Have a nice day...