VFS_BUG_ON_INODE(!S_ISDIR(inode->i_mode)) encountered for inode ffff8880500d8878
fs ocfs2 mode 100000 opflags 0x2 flags 0x20 state 0x0 count 2
------------[ cut here ]------------
kernel BUG at fs/namei.c:630!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:630 [inline]
RIP: 0010:may_lookup fs/namei.c:1908 [inline]
RIP: 0010:link_path_walk+0x18cb/0x18d0 fs/namei.c:2545
Code: e8 ca 2c e3 fe 90 0f 0b e8 42 6f 7f ff 44 89 fd e9 6a fd ff ff e8 35 6f 7f ff 48 89 ef 48 c7 c6 60 e9 bd 8b e8 a6 2c e3 fe 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc9000e95fa80 EFLAGS: 00010286
RAX: 000000000000008e RBX: ffffc9000e95fcb8 RCX: 0d4f38b1d914c800
RDX: ffffc900204a1000 RSI: 000000000000085a RDI: 000000000000085b
RBP: ffff8880500d8878 R08: ffffc9000e95f7a7 R09: 1ffff92001d2bef4
R10: dffffc0000000000 R11: fffff52001d2bef5 R12: 0000000000008000
R13: ffffc9000e95fc80 R14: 0000000000008000 R15: ffff888011aac420
FS:  00007f0c1b4196c0(0000) GS:ffff88808cce8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe9b2f1f7c CR3: 0000000011b44000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 path_lookupat+0xe4/0x8c0 fs/namei.c:2753
 filename_lookup+0x256/0x5d0 fs/namei.c:2783
 user_path_at+0x3a/0x60 fs/namei.c:3576
 ksys_umount fs/namespace.c:2058 [inline]
 __do_sys_umount fs/namespace.c:2066 [inline]
 __se_sys_umount fs/namespace.c:2064 [inline]
 __x64_sys_umount+0xf6/0x170 fs/namespace.c:2064
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c1a59aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c1b419028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f0c1a816090 RCX: 00007f0c1a59aeb9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000200000000380
RBP: 00007f0c1a608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0c1a816128 R14: 00007f0c1a816090 R15: 00007ffc2868ef68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:630 [inline]
RIP: 0010:may_lookup fs/namei.c:1908 [inline]
RIP: 0010:link_path_walk+0x18cb/0x18d0 fs/namei.c:2545
Code: e8 ca 2c e3 fe 90 0f 0b e8 42 6f 7f ff 44 89 fd e9 6a fd ff ff e8 35 6f 7f ff 48 89 ef 48 c7 c6 60 e9 bd 8b e8 a6 2c e3 fe 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc9000e95fa80 EFLAGS: 00010286
RAX: 000000000000008e RBX: ffffc9000e95fcb8 RCX: 0d4f38b1d914c800
RDX: ffffc900204a1000 RSI: 000000000000085a RDI: 000000000000085b
RBP: ffff8880500d8878 R08: ffffc9000e95f7a7 R09: 1ffff92001d2bef4
R10: dffffc0000000000 R11: fffff52001d2bef5 R12: 0000000000008000
R13: ffffc9000e95fc80 R14: 0000000000008000 R15: ffff888011aac420
FS:  00007f0c1b4196c0(0000) GS:ffff88808cce8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c0e47f000 CR3: 0000000011b44000 CR4: 0000000000352ef0