RBP: 00007fff3d6c96a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
list_add double add: new=ffffffff8801d6a0, prev=ffffffff8801d500, next=ffffffff8801d6a0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7009 Comm: syz-executor248 Not tainted 4.14.124 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809560c440 task.stack: ffff8880a3d40000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff8880a3d47af0 EFLAGS: 00010082
RAX: 0000000000000058 RBX: ffffffff8801d640 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff866d0ca0 RDI: ffffed10147a8f54
RBP: ffff8880a3d47b08 R08: 0000000000000058 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88809560c440 R12: ffffffff8801d6a0
R13: ffffffff8801d6a0 R14: ffffffff8801d6a0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004c0708 CR3: 000000000766a000 CR4: 00000000001406e0
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+0x3f/0x100 net/core/net_namespace.c:530
 put_net include/net/net_namespace.h:219 [inline]
 __sk_destruct+0x4a5/0x5d0 net/core/sock.c:1585
 sk_destruct+0x67/0x80 net/core/sock.c:1594
 __sk_free+0x54/0x230 net/core/sock.c:1602
 sk_free+0x35/0x40 net/core/sock.c:1613
 sock_put include/net/sock.h:1653 [inline]
 sk_common_release+0x207/0x310 net/core/sock.c:3017
 udp_lib_close+0x16/0x20 include/net/udp.h:203
 inet_release+0xec/0x1c0 net/ipv4/af_inet.c:425
 __sock_release+0xce/0x2b0 net/socket.c:602
 sock_close+0x1b/0x30 net/socket.c:1139
 __fput+0x275/0x7a0 fs/file_table.c:210
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x114/0x190 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x7df/0x2c10 kernel/exit.c:874
 do_group_exit+0x111/0x330 kernel/exit.c:977
 SYSC_exit_group kernel/exit.c:988 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:986
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440168
RSP: 002b:00007fff3d6c9628 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440168
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c06d0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
Code: e9 56 ff ff ff 4c 89 e1 48 c7 c7 60 29 9d 86 e8 0f 1c 73 fe 0f 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 a0 2a 9d 86 e8 f8 1b 73 fe <0f> 0b 48 89 f1 48 c7 c7 20 2a 9d 86 4c 89 e6 e8 e4 1b 73 fe 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff8880a3d47af0
---[ end trace c512328f6212b362 ]---