overlayfs: filesystem on './file0' not supported as upperdir
WARNING: CPU: 1 PID: 1389 at fs/overlayfs/dir.c:263 ovl_instantiate+0x293/0x2f0 fs/overlayfs/dir.c:263
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1389 Comm: syz-executor.5 Not tainted 5.0.0+ #12
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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:ovl_instantiate+0x293/0x2f0 fs/overlayfs/dir.c:263
Code: 04 31 ff 89 c3 89 c6 e8 0b af 1c ff 85 db 75 63 e8 82 ad 1c ff 4c 89 e7 45 31 e4 e8 97 66 63 ff e9 20 ff ff ff e8 6d ad 1c ff <0f> 0b 41 89 dc e9 11 ff ff ff e8 5e ad 1c ff 0f 0b eb 86 48 89 85
RSP: 0018:ffff88807d617a98 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffffffffffffff8c RCX: ffffc90010884000
RDX: 00000000000143aa RSI: ffffffff8253a453 RDI: 0000000000000007
RBP: ffff88807d617b70 R08: ffff8880507163c0 R09: ffffed100fac2f2c
R10: ffffed100fac2f2b R11: 0000000000000003 R12: ffff88807c3d98c0
R13: ffff888081cff600 R14: 0000000000000000 R15: ffff88807d617b48
 ovl_create_over_whiteout fs/overlayfs/dir.c:518 [inline]
 ovl_create_or_link+0xabb/0x1250 fs/overlayfs/dir.c:582
 ovl_create_object+0x231/0x2c0 fs/overlayfs/dir.c:616
 ovl_symlink+0x25/0x30 fs/overlayfs/dir.c:651
 vfs_symlink fs/namei.c:4126 [inline]
 vfs_symlink+0x378/0x5d0 fs/namei.c:4112
 do_symlinkat+0x22b/0x290 fs/namei.c:4153
 __do_sys_symlink fs/namei.c:4172 [inline]
 __se_sys_symlink fs/namei.c:4170 [inline]
 __x64_sys_symlink+0x59/0x80 fs/namei.c:4170
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbdec9edc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457f29
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000040
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbdec9ee6d4
R13: 00000000004c6591 R14: 00000000004db9d0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..