BUG: Dentry still in use [unmount of msdos loop3] (2)

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	875d	914d	0/2	closed as dup on 2021/10/28 13:08
android-54	BUG: Dentry still in use [unmount of msdos loop3]				2	1096d	1137d	0/2	auto-closed as invalid on 2021/08/22 12:19

BUG: Dentry ffff8881e574a110{i=0,n=.index} still in use (1) [unmount of msdos loop3] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1274 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 0 PID: 1274 Comm: syz-executor.3 Not tainted 5.4.125-syzkaller-00010-g1a97657426d5 #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 09 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881f3cffc58 EFLAGS: 00010282 RAX: 0000000000000055 RBX: ffffffff85fc6160 RCX: a2384d91fd40ad00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881a36cf420 R08: ffffffff814e90d7 R09: ffffed103edc9608 R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e574a110 FS: 0000555557326400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555732fb38 CR3: 00000001eb5a0000 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: 0033:0x7f0e90f2ab67 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:00007fff45bc2cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f0e90f2ab67 RDX: 00007fff45bc2d8a RSI: 0000000000000002 RDI: 00007fff45bc2d80 RBP: 00007fff45bc2d80 R08: 00000000ffffffff R09: 00007fff45bc2b50 R10: 0000555557327bd3 R11: 0000000000000246 R12: 00007f0e90f82e80 R13: 00007fff45bc3e40 R14: 0000555557327b00 R15: 00007fff45bc3e80 ---[ end trace f00a1d6a2b7740b9 ]--- BUG: Dentry ffff8881e574a110{i=0,n=.index} still in use (1) [unmount of msdos loop3] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1274 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 0 PID: 1274 Comm: syz-executor.3 Tainted: G W 5.4.125-syzkaller-00010-g1a97657426d5 #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 09 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881f3cffc58 EFLAGS: 00010282 RAX: 0000000000000055 RBX: ffffffff85fc6160 RCX: a2384d91fd40ad00 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffff8881a36cf420 R08: ffffffff814e90d7 R09: ffffed103edc9608 R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e574a110 FS: 0000555557326400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555732fb38 CR3: 00000001eb5a0000 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: 0033:0x7f0e90f2ab67 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:00007fff45bc2cb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f0e90f2ab67 RDX: 00007fff45bc2d8a RSI: 0000000000000002 RDI: 00007fff45bc2d80 RBP: 00007fff45bc2d80 R08: 00000000ffffffff R09: 00007fff45bc2b50 R10: 0000555557327bd3 R11: 0000000000000246 R12: 00007f0e90f82e80 R13: 00007fff45bc3e40 R14: 0000555557327b00 R15: 00007fff45bc3e80 ---[ end trace f00a1d6a2b7740ba ]--- VFS: Busy inodes after unmount of loop3. Self-destruct in 5 seconds. Have a nice day...