RBP: 00007fb8bda62ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffff548424f R14: 00007fb8bda639c0 R15: 000000000118cf4c
list_add double add: new=ffff888056f88160, prev=ffffffff886e6100, next=ffff888056f88160.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6376 Comm: syz-executor.3 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888058d884c0 task.stack: ffff888058d90000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff888058d97c88 EFLAGS: 00010082
RAX: 0000000000000058 RBX: ffff888056f88100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed100b1b2f87
RBP: ffff888056f88160 R08: 0000000000000058 R09: 0000000000000002
R10: 0000000000000000 R11: ffff888058d884c0 R12: ffff888056f88160
R13: ffff888056f88160 R14: ffff888054405818 R15: ffffffff8b0619e0
FS:  0000000002b09940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000746138 CR3: 0000000058d6d000 CR4: 00000000001406f0
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+0x589/0x6e0 net/core/sock.c:1581
 sk_destruct net/core/sock.c:1597 [inline]
 __sk_free+0xd9/0x2d0 net/core/sock.c:1605
 sk_free+0x2b/0x40 net/core/sock.c:1616
 sock_put include/net/sock.h:1662 [inline]
 tcp_close+0x983/0xed0 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+0x11f/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
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417901
RSP: 002b:00007ffff5483dd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffff5483e40 RCX: 0000000000417901
RDX: 00000000000000e0 RSI: 00007ffff5484220 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000006000 R09: 0000000000004000
R10: 00007ffff5483e40 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffff54844c0 R14: 00000000000a3c1c R15: 00007ffff54844d0
Code: e9 57 ff ff ff 4c 89 e1 48 c7 c7 c0 63 e4 86 e8 63 92 44 fe 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 00 65 e4 86 e8 4c 92 44 fe <0f> 0b 48 89 f1 48 c7 c7 80 64 e4 86 4c 89 e6 e8 38 92 44 fe 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff888058d97c88
---[ end trace 18935e8f8c9dd8ff ]---