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: 5210 at fs/overlayfs/dir.c:263 ovl_instantiate+0x363/0x400 fs/overlayfs/dir.c:263 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 5210 Comm: syz-executor0 Not tainted 5.0.0-rc1+ #15 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+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x48 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:ovl_instantiate+0x363/0x400 fs/overlayfs/dir.c:263 Code: c3 89 c6 e8 ff 5c f0 fe 85 db 0f 85 a6 00 00 00 e8 72 5b f0 fe 4c 89 e7 45 31 e4 e8 e7 e5 46 ff e9 ef fe ff ff e8 5d 5b f0 fe <0f> 0b 41 89 dc e9 e0 fe ff ff e8 4e 5b f0 fe 0f 0b e9 64 ff ff ff RSP: 0018:ffff8880877cf9d0 EFLAGS: 00010293 RAX: ffff88808f7a64c0 RBX: ffffffffffffff8c RCX: ffffffff82919a31 kobject: 'loop2' (000000007eae6038): kobject_uevent_env RDX: 0000000000000000 RSI: ffffffff82919bb3 RDI: 0000000000000007 RBP: ffff8880877cfab0 R08: ffff88808f7a64c0 R09: ffffed1010ef9efc R10: ffffed1010ef9efb R11: 0000000000000003 R12: ffff888079000ca0 R13: ffff8880877cfa88 R14: 0000000000000000 R15: ffff8880877cfa08 kobject: 'loop2' (000000007eae6038): fill_kobj_path: path = '/devices/virtual/block/loop2' ovl_create_over_whiteout fs/overlayfs/dir.c:518 [inline] ovl_create_or_link+0xa92/0x1560 fs/overlayfs/dir.c:582 ovl_create_object+0x2fa/0x3b0 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+0x239/0x2c0 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+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4913b92c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4913b936d4 R13: 00000000004c631f R14: 00000000004db308 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..