list_add double add: new=ffff888067c000a0, prev=ffffffff884d7400, next=ffff888067c000a0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6369 Comm: syz-executor.0 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888096b8c340 task.stack: ffff888086310000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff888086317c70 EFLAGS: 00010086
RAX: 0000000000000058 RBX: ffff888067c00040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff868c0c40 RDI: ffffed1010c62f84
RBP: ffff888067c000a0 R08: 0000000000000058 R09: 0000000000000002
R10: ffff888096b8cc18 R11: ffff888096b8c340 R12: ffff888067c000a0
R13: ffff888067c000a0 R14: ffff888091c73588 R15: ffffffff8ae38fe0
FS:  000000000111c940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073e138 CR3: 00000000966b3000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 __put_net+0x3a/0x100 net/core/net_namespace.c:530
 put_net include/net/net_namespace.h:219 [inline]
 __sk_destruct+0x507/0x640 net/core/sock.c:1580
 sk_destruct+0x97/0xc0 net/core/sock.c:1596
 __sk_free+0x4c/0x220 net/core/sock.c:1604
 sk_free+0x2b/0x40 net/core/sock.c:1615
 sock_put include/net/sock.h:1658 [inline]
 tcp_close+0x9cb/0xf20 net/ipv4/tcp.c:2306
 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x113/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
CPU: 1 PID: 21305 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
RIP: 0033:0x416700
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RSP: 002b:00007fffd744be78 EFLAGS: 00000246
Call Trace:
 ORIG_RAX: 0000000000000003
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
RAX: 0000000000000000 RBX: 00007fffd744bf80 RCX: 0000000000416700
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
RDX: 00000000000000e0 RSI: 00007fffd744c360 RDI: 0000000000000003
 should_failslab+0xd6/0x130 mm/failslab.c:32
RBP: 0000000000000003 R08: 0000000000006000 R09: 0000000000004000
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x28e/0x3c0 mm/slab.c:3550
R10: 00007fffd744bf80 R11: 0000000000000246 R12: 0000000000000000
 __d_alloc+0x2a/0x9b0 fs/dcache.c:1623
R13: 00007fffd744c600 R14: 0000000000053a4f R15: 00007fffd744c610
 d_alloc+0x46/0x240 fs/dcache.c:1710
Code: 
 __rpc_lookup_create_exclusive+0xf8/0x110 net/sunrpc/rpc_pipe.c:653
e9 
57 
ff 
 rpc_populate.constprop.0+0xc5/0x350 net/sunrpc/rpc_pipe.c:720
ff 
ff 
 rpc_fill_super+0x31e/0x8e0 net/sunrpc/rpc_pipe.c:1405
4c 
89 
e1 
48 
c7 
c7 
 mount_ns+0xdc/0x180 fs/super.c:1051
a0 
 mount_fs+0x92/0x2a0 fs/super.c:1237
4a 
 vfs_kern_mount.part.0+0x5b/0x3c0 fs/namespace.c:1046
c4 
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x3c9/0x25e0 fs/namespace.c:2879
86 
e8 
7d 
20 
4b 
fe 
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
0f 
0b 
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
48 
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
89 
RIP: 0033:0x45cba9
f2 
RSP: 002b:00007f5edf1f7c78 EFLAGS: 00000246
4c 
 ORIG_RAX: 00000000000000a5
89 
RAX: ffffffffffffffda RBX: 00000000004f7780 RCX: 000000000045cba9
e1 
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000000
48 
RBP: 000000000078c0e0 R08: 0000000020000100 R09: 0000000000000000
89 
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
ee 
R13: 0000000000000774 R14: 00000000004ca7e5 R15: 00007f5edf1f86d4
48 
net/sunrpc/rpc_pipe.c: rpc_populate failed to populate directory /
c7 c7 e0 4b c4 86 e8 66 20 4b fe <0f> 0b 48 89 f1 48 c7 c7 60 4b c4 86 4c 89 e6 e8 52 20 4b fe 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff888086317c70
---[ end trace cc33982c2a15856b ]---