BUG: Dentry 0000000070fa6426{i=0,n=.incomplete} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 365 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 365 Comm: syz-executor891 Not tainted 5.4.85-syzkaller-00188-g8657d5d6282f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1dd/0x24e lib/dump_stack.c:118 panic+0x285/0x750 kernel/panic.c:221 __warn+0x1fd/0x200 kernel/panic.c:582 report_bug+0x390/0x4d0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] do_error_trap arch/x86/kernel/traps.c:272 [inline] do_invalid_op+0x6e/0x110 arch/x86/kernel/traps.c:291 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:1029 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 63 43 1d 85 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 27 54 b0 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:ffff8881dfd2f700 EFLAGS: 00010296 RAX: 0000000000000059 RBX: ffffffff8548cd30 RCX: 5ab2b1fe42654e00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881e9af9420 R08: ffffffff814e3421 R09: ffffed103ee25e08 R10: ffffed103ee25e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881efdeb330 d_walk+0x2e9/0x570 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1b0 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+0x1b8/0x280 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x176/0x1a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xcc2/0x2830 kernel/exit.c:811 do_group_exit+0x155/0x2b0 kernel/exit.c:909 get_signal+0x13ec/0x1f00 kernel/signal.c:2745 do_signal+0x92/0x5d0 arch/x86/kernel/signal.c:815 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: 0033:0x44a219 Code: Bad RIP value. RSP: 002b:00007f2e989b4d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006dbc38 RCX: 000000000044a219 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc38 RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c R13: 0000000000004002 R14: 0001800200746166 R15: 2e7366ae5d903ceb Kernel Offset: disabled Rebooting in 86400 seconds..