RBP: 00007f16fc6f4a90 R08: 000000002040e000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a
R13: 00007f16fc6f4bc8 R14: 00000000004b767a R15: 0000000000000000
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: 0 PID: 9620 Comm: syz-executor5 Not tainted 4.15.0-rc7+ #259
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
RSP: 0018:ffff8801c498f7a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801c17c4798 RDI: ffff8801c17c47a0
RBP: ffff8801c498f7b8 R08: ffffffff81d173c2 R09: 0000000000000004
R10: ffff8801c498f7b8 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801c743e200 R14: ffff8801c498f848 R15: ffff8801c17c4798
FS:  00007f16fc6f5700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000aff8 CR3: 00000001c86fb001 CR4: 00000000001606f0
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
 sysfs_kill_sb+0x22/0x40 fs/sysfs/mount.c:53
 deactivate_locked_super+0x88/0xd0 fs/super.c:312
 sget_userns+0xbda/0xe40 fs/super.c:522
 kernfs_mount_ns+0x13d/0x8b0 fs/kernfs/mount.c:320
 sysfs_mount+0xc2/0x1c0 fs/sysfs/mount.c:39
 mount_fs+0x66/0x2d0 fs/super.c:1222
 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
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f16fc6f4c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f16fc6f4aa0 RCX: 0000000000452ac9
RDX: 0000000020a45000 RSI: 000000002000aff8 RDI: 0000000020fcdff2
RBP: 00007f16fc6f4a90 R08: 000000002040e000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a
R13: 00007f16fc6f4bc8 R14: 00000000004b767a R15: 0000000000000000
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: ffff8801c498f7a0
---[ end trace 83a4470fe075b4a6 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..