WARNING: CPU: 1 PID: 27616 at fs/overlayfs/dir.c:263 ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 27616 Comm: syz-executor2 Not tainted 4.20.0-rc4+ #130
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263
Code: c3 89 c6 e8 b9 ea ef fe 85 db 0f 85 9e 00 00 00 e8 9c e9 ef fe 4c 89 e7 45 31 f6 e8 b1 5a 46 ff e9 ec fe ff ff e8 87 e9 ef fe <0f> 0b e9 e0 fe ff ff e8 7b e9 ef fe 0f 0b e9 63 ff ff ff e8 8f 38
RSP: 0018:ffff8881901579a0 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff888190157a38 RCX: ffffc9000be92000
RDX: 000000000003272c RSI: ffffffff828fa179 RDI: 0000000000000007
RBP: ffff888190157a60 R08: ffff88818a7980c0 R09: ffffed103202aee7
R10: ffffed103202aee7 R11: 0000000000000003 R12: ffff88818504e000
R13: ffff8881901579d8 R14: ffffffffffffff8c R15: 0000000000000000
 ovl_create_upper fs/overlayfs/dir.c:320 [inline]
 ovl_create_or_link+0x84b/0x1560 fs/overlayfs/dir.c:580
 ovl_create_object+0x2e9/0x3a0 fs/overlayfs/dir.c:616
 ovl_mkdir+0x2b/0x30 fs/overlayfs/dir.c:635
 vfs_mkdir+0x42e/0x6b0 fs/namei.c:3817
 do_mkdirat+0x27a/0x310 fs/namei.c:3840
 __do_sys_mkdir fs/namei.c:3856 [inline]
 __se_sys_mkdir fs/namei.c:3854 [inline]
 __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3854
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4bacf97c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4bacf986d4
R13: 00000000004bcf1f R14: 00000000004d4738 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..