list_del corruption. prev->next should be 000000004cf41c3c, but was 000000004b5b3333
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 12231 Comm: syz-executor5 Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x58 lib/list_debug.c:51
RSP: 0018:ffff880181fcf748 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8801b069af50 RCX: 0000000000000000
RDX: 0000000000000054 RSI: ffffffff815f6911 RDI: ffffed00303f9edf
RBP: ffff880181fcf760 R08: ffff8801b46e22c0 R09: ffffed003b624fb0
R10: ffffed003b624fb0 R11: ffff8801db127d87 R12: ffff880130026270
R13: ffff880130026820 R14: ffff880181fcf838 R15: dffffc0000000000
FS:  00007fb19b637700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000093002d CR3: 00000001c8ae0000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 dentry_unlist fs/dcache.c:518 [inline]
 __dentry_kill+0x295/0x770 fs/dcache.c:571
 dentry_kill fs/dcache.c:616 [inline]
 dput.part.25+0x6f9/0x9a0 fs/dcache.c:831
 dput+0x1f/0x30 fs/dcache.c:795
 rpc_gssd_dummy_depopulate net/sunrpc/rpc_pipe.c:1381 [inline]
 rpc_fill_super+0x882/0xbb0 net/sunrpc/rpc_pipe.c:1426
 mount_ns+0x12a/0x1d0 fs/super.c:1036
 rpc_mount+0x9e/0xd0 net/sunrpc/rpc_pipe.c:1451
 mount_fs+0xae/0x328 fs/super.c:1222
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2847
 ksys_mount+0x12d/0x140 fs/namespace.c:3063
 SYSC_mount fs/namespace.c:3077 [inline]
 SyS_mount+0x35/0x50 fs/namespace.c:3074
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455319
RSP: 002b:00007fb19b636c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb19b6376d4 RCX: 0000000000455319
RDX: 0000000020000480 RSI: 0000000020000180 RDI: 0000000020000100
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000000003fb R14: 00000000006f9028 R15: 0000000000000051
Code: 20 1b d8 87 e8 aa de 2c fe 0f 0b 48 89 de 48 c7 c7 40 1c d8 87 e8 99 de 2c fe 0f 0b 48 89 de 48 c7 c7 e0 1b d8 87 e8 88 de 2c fe <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 
RIP: __list_del_entry_valid.cold.1+0x48/0x58 lib/list_debug.c:51 RSP: ffff880181fcf748
---[ end trace b5cb34a2690e94dc ]---