R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe21dffabf R14: 00007f16f02eb300 R15: 0000000000022000
list_add double add: new=ffff8880a19841e0, prev=ffffffff89cdc7c0, next=ffff8880a19841e0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8003 Comm: syz-executor.2 Not tainted 4.14.272-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888090e6c540 task.stack: ffff88809f288000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff88809f28fc88 EFLAGS: 00010082
RAX: 0000000000000058 RBX: ffff8880a1984180 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bc340 RDI: ffffed1013e51f87
RBP: ffff8880a19841e0 R08: 0000000000000058 R09: 0000000000000002
R10: 0000000000000000 R11: ffff888090e6c540 R12: ffff8880a19841e0
R13: ffff8880a19841e0 R14: ffff8880aa194818 R15: ffffffff8c9b5960
FS:  0000555556b35400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16f1a561b8 CR3: 0000000091739000 CR4: 00000000003406e0
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:533
 put_net include/net/net_namespace.h:219 [inline]
 __sk_destruct+0x5f5/0x760 net/core/sock.c:1599
 sk_destruct net/core/sock.c:1615 [inline]
 __sk_free+0xd9/0x2d0 net/core/sock.c:1623
 sk_free+0x2b/0x40 net/core/sock.c:1634
 sock_put include/net/sock.h:1664 [inline]
 tcp_close+0x98b/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: 0033:0x7f16f1928c8b
RSP: 002b:00007ffe21dffd00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffe21dffda0 RCX: 00007f16f1928c8b
RDX: 0000000000000000 RSI: 000000e7303a8198 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: ff00000000000000
R10: 0000000000000010 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000a07c7 R14: 0000000000000003 R15: 00007ffe21dffde0
Code: e9 87 c3 0e fc 4c 89 e1 48 c7 c7 80 fc cc 87 e8 bc f2 f7 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 c0 fd cc 87 e8 a5 f2 f7 ff <0f> 0b 48 89 f1 48 c7 c7 40 fd cc 87 4c 89 e6 e8 91 f2 f7 ff 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff88809f28fc88
---[ end trace eb9c4be74fc4453b ]---