list_add double add: new=ffff8880566ac0e0, prev=ffffffff886d9980, next=ffff8880566ac0e0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6350 Comm: syz-executor.0 Not tainted 4.14.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809017c040 task.stack: ffff8880847f0000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff8880847f7c70 EFLAGS: 00010086
RAX: 0000000000000058 RBX: ffff8880566ac080 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86ac07e0 RDI: ffffed10108fef84
RBP: ffff8880566ac0e0 R08: 0000000000000058 R09: 0000000000000002
R10: ffff88809017c910 R11: ffff88809017c040 R12: ffff8880566ac0e0
R13: ffff8880566ac0e0 R14: ffff888052d76088 R15: ffffffff8b03ec20
FS:  0000000001719940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000071a138 CR3: 0000000090fdf000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000006920 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+0x508/0x640 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+0x9d5/0xf30 net/ipv4/tcp.c:2304
 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/0x790 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+0x1d6/0x220 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
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x416400
RSP: 002b:00007ffda95d77b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffda95d78c0 RCX: 0000000000416400
RDX: 00000000000000e0 RSI: 00007ffda95d7ca0 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000006000 R09: 0000000000004000
R10: 00007ffda95d78c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffda95d7f40 R14: 00000000000ddfb4 R15: 00007ffda95d7f50
Code: e9 57 ff ff ff 4c 89 e1 48 c7 c7 40 56 e4 86 e8 bd c3 4a fe 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 80 57 e4 86 e8 a6 c3 4a fe <0f> 0b 48 89 f1 48 c7 c7 00 57 e4 86 4c 89 e6 e8 92 c3 4a fe 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff8880847f7c70
---[ end trace a9bea4a599bb96b4 ]---