RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f88fa877000 RBP: 00007f88fa877040 R08: 00007f88fa877040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f88fa877000 R15: 0000000020000140 BUG: Dentry 00000000f0c18c2b{i=0,n=/} still in use (-128) [unmount of erofs loop2] erofs: unmounted for /dev/loop5 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 18698 at fs/dcache.c:1518 umount_check fs/dcache.c:1518 [inline] WARNING: CPU: 1 PID: 18698 at fs/dcache.c:1518 umount_check.cold+0xf2/0x116 fs/dcache.c:1499 erofs: root inode @ nid 36 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 18698 Comm: syz-executor.2 Not tainted 4.19.172-syzkaller #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+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 erofs: mounted on /dev/loop1 with opts: acl. __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 erofs: root inode @ nid 36 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:umount_check fs/dcache.c:1518 [inline] RIP: 0010:umount_check.cold+0xf2/0x116 fs/dcache.c:1499 Code: f9 4d 89 f1 45 89 e0 48 89 e9 41 55 4c 89 fa 48 89 ee 48 c7 c7 c0 a2 74 88 e8 44 f0 fe ff 48 c7 c7 c0 a1 74 88 e8 38 f0 fe ff <0f> 0b 58 e9 c0 bf b6 f9 e8 2c 6b a6 f9 e9 22 ff ff ff 48 89 df e8 RSP: 0018:ffff8880507bfa98 EFLAGS: 00010286 RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff814de0d1 RDI: ffffed100a0f7f45 RBP: ffff8880adf27300 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffffff80 R13: ffff88808ec16790 R14: ffffffff893f58a0 R15: 0000000000000000 d_walk+0x196/0x990 fs/dcache.c:1253 do_one_tree fs/dcache.c:1525 [inline] shrink_dcache_for_umount+0x87/0x330 fs/dcache.c:1541 generic_shutdown_super+0x68/0x370 fs/super.c:441 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 mount_bdev+0x373/0x3b0 fs/super.c:1160 erofs_mount+0x8c/0xc0 drivers/staging/erofs/super.c:512 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46702a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007f88fa876fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046702a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f88fa877000 RBP: 00007f88fa877040 R08: 00007f88fa877040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f88fa877000 R15: 0000000020000140 Kernel Offset: disabled Rebooting in 86400 seconds..