list_add double add: new=ffff88805f8c40e0, prev=ffffffff89cd4240, next=ffff88805f8c40e0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880b5ff61c0 task.stack: ffff8880b5408000
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
RSP: 0018:ffff8880b540fc40 EFLAGS: 00010082
RAX: 0000000000000058 RBX: ffff88805f8c4080 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bbb40 RDI: ffffed1016a81f7e
RBP: ffff88805f8c40e0 R08: 0000000000000058 R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880b5ff61c0 R12: ffff88805f8c40e0
R13: ffff88805f8c40e0 R14: ffff8880ab178558 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557a42b63058 CR3: 000000005fd8f000 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+0x5f5/0x760 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
 deferred_put_nlk_sk+0xed/0x260 net/netlink/af_netlink.c:711
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2699 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288
 run_ksoftirqd+0x50/0x1a0 kernel/softirq.c:670
 smpboot_thread_fn+0x5c1/0x920 kernel/smpboot.c:164
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: e9 95 54 10 fc 4c 89 e1 48 c7 c7 40 d7 cc 87 e8 fa f7 f7 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 80 d8 cc 87 e8 e3 f7 f7 ff <0f> 0b 48 89 f1 48 c7 c7 00 d8 cc 87 4c 89 e6 e8 cf f7 f7 ff 0f 
RIP: __list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 RSP: ffff8880b540fc40
---[ end trace ac03ace6a61f9f59 ]---