VFS_BUG_ON_INODE(!S_ISDIR(inode->i_mode)): inode:ffff88804498a460 fs:ocfs2 mode:100000 opflags:0x2 flags:0x20 state:0x0 count:2
------------[ cut here ]------------
kernel BUG at fs/namei.c:687!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5321 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:687 [inline]
RIP: 0010:may_lookup fs/namei.c:1961 [inline]
RIP: 0010:link_path_walk+0x1904/0x1910 fs/namei.c:2604
Code: e8 91 69 03 00 90 0f 0b e8 a9 3d 79 ff 45 89 fc e9 54 fd ff ff e8 9c 3d 79 ff 4c 89 e7 48 c7 c6 40 c6 fe 8b e8 6d 69 03 00 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e59fa80 EFLAGS: 00010246
RAX: c9b8aa0f2ae26300 RBX: ffffc9000e59fcb8 RCX: c9b8aa0f2ae26300
RDX: ffffc90020001000 RSI: 0000000000000800 RDI: 0000000000000801
RBP: 0000000000008000 R08: ffff88801fc24713 R09: 1ffff11003f848e2
R10: dffffc0000000000 R11: ffffed1003f848e3 R12: ffff88804498a460
R13: ffffc9000e59fcd0 R14: 0000000000008000 R15: ffff88800bdc8118
FS:  00007f9d815bf6c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d7460fe00 CR3: 000000000bd6e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 path_lookupat+0xe4/0x8c0 fs/namei.c:2812
 filename_lookup+0x265/0x5d0 fs/namei.c:2842
 ksys_truncate+0xbb/0x1c0 fs/open.c:140
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9d8079de99
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:00007f9d815befe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f9d80a26090 RCX: 00007f9d8079de99
RDX: 0000000000000000 RSI: 00000020fdfffffe RDI: 0000200000000100
RBP: 00007f9d80833eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9d80a26128 R14: 00007f9d80a26090 R15: 00007ffe1c3e3028
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lookup_inode_permission_may_exec fs/namei.c:687 [inline]
RIP: 0010:may_lookup fs/namei.c:1961 [inline]
RIP: 0010:link_path_walk+0x1904/0x1910 fs/namei.c:2604
Code: e8 91 69 03 00 90 0f 0b e8 a9 3d 79 ff 45 89 fc e9 54 fd ff ff e8 9c 3d 79 ff 4c 89 e7 48 c7 c6 40 c6 fe 8b e8 6d 69 03 00 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e59fa80 EFLAGS: 00010246
RAX: c9b8aa0f2ae26300 RBX: ffffc9000e59fcb8 RCX: c9b8aa0f2ae26300
RDX: ffffc90020001000 RSI: 0000000000000800 RDI: 0000000000000801
RBP: 0000000000008000 R08: ffff88801fc24713 R09: 1ffff11003f848e2
R10: dffffc0000000000 R11: ffffed1003f848e3 R12: ffff88804498a460
R13: ffffc9000e59fcd0 R14: 0000000000008000 R15: ffff88800bdc8118
FS:  00007f9d815bf6c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffaa935f52 CR3: 000000000bd6e000 CR4: 0000000000352ef0