overlayfs: filesystem on './file0' not supported as upperdir overlayfs: filesystem on './file0' not supported as upperdir overlayfs: filesystem on './file0' not supported as upperdir overlayfs: filesystem on './file0' not supported as upperdir overlayfs: filesystem on './file0' not supported as upperdir WARNING: CPU: 0 PID: 7256 at fs/overlayfs/dir.c:261 ovl_instantiate+0x2e5/0x3f0 fs/overlayfs/dir.c:279 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7256 Comm: syz-executor3 Not tainted 4.17.0-rc7+ #1 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+0x16e/0x22a lib/dump_stack.c:113 panic+0x1c6/0x37d kernel/panic.c:184 __warn.cold.8+0x120/0x16c kernel/panic.c:536 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1df/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:ovl_instantiate+0x2e5/0x3f0 fs/overlayfs/dir.c:261 RSP: 0018:ffff88008702f9c0 EFLAGS: 00010202 RAX: ffffffffffffff8c RBX: 1ffff10010e05f3a RCX: 1ffff10010e05ef2 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff880092ff17e8 RBP: ffff88008702fa78 R08: ffffed00125fe2fe R09: ffffed00125fe2fd R10: ffffed00125fe2fd R11: ffff880092ff17eb R12: ffff88008702fa50 R13: ffff88008702f9f0 R14: ffff880077a55080 R15: ffffffffffffff8c ovl_create_over_whiteout fs/overlayfs/dir.c:513 [inline] ovl_create_or_link+0x964/0x1110 fs/overlayfs/dir.c:577 ovl_create_object+0x284/0x3f0 fs/overlayfs/dir.c:607 ovl_symlink+0x16/0x20 fs/overlayfs/dir.c:642 vfs_symlink+0x2f9/0x520 fs/namei.c:4097 do_symlinkat+0x1b6/0x220 fs/namei.c:4124 __do_sys_symlink fs/namei.c:4143 [inline] __se_sys_symlink fs/namei.c:4141 [inline] __x64_sys_symlink+0x54/0x80 fs/namei.c:4141 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458019 RSP: 002b:00007f3ae7ba4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458019 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3ae7ba56d4 R13: 00000000004c63bf R14: 00000000004db3a8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..