kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 17272 Comm: syz-executor3 Not tainted 4.16.0-rc6+ #43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0x7e/0x150 lib/list_debug.c:51
EXT4-fs (sda1): re-mounted. Opts: 
RSP: 0018:ffff8801d1edf890 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801b3321818 RDI: ffff8801b3321820
RBP: ffff8801d1edf8a8 R08: ffffffff81d39d22 R09: 0000000000000004
R10: ffff8801d1edf8a8 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801b8650080 R14: ffff8801d1edf938 R15: ffff8801b3321818
FS:  00007f0c2d797700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f99952cd000 CR3: 00000001d7dfb006 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 kernfs_kill_sb+0x9e/0x330 fs/kernfs/mount.c:361
overlayfs: missing 'lowerdir'
 sysfs_kill_sb+0x22/0x40 fs/sysfs/mount.c:50
 deactivate_locked_super+0x88/0xd0 fs/super.c:312
 kernfs_mount_ns+0x717/0x8b0 fs/kernfs/mount.c:335
 sysfs_mount+0xc2/0x1c0 fs/sysfs/mount.c:36
EXT4-fs (sda1): Unrecognized mount option "ÿÿÿÿ" or missing value
 mount_fs+0x66/0x2d0 fs/super.c:1222
overlayfs: missing 'lowerdir'
 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:2509 [inline]
 do_new_mount fs/namespace.c:2512 [inline]
 do_mount+0xea4/0x2bb0 fs/namespace.c:2842
 SYSC_mount fs/namespace.c:3058 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3035
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x454e79
RSP: 002b:00007f0c2d796c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0c2d7976d4 RCX: 0000000000454e79
RDX: 0000000020000140 RSI: 0000000020000100 RDI: 00000000200000c0
RBP: 000000000072bea0 R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 00000000000003fa R14: 00000000006f8010 R15: 000000000000003a
Code: 00 00 00 00 ad de 49 39 c4 74 66 48 b8 00 02 00 00 00 00 ad de 48 89 da 48 39 c3 74 65 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 75 7b 48 8b 13 48 39 f2 75 57 49 8d 7c 24 08 48 b8 
RIP: __list_del_entry_valid+0x7e/0x150 lib/list_debug.c:51 RSP: ffff8801d1edf890
---[ end trace afa6dd87ee6c8d0a ]---