------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62d/0x740, CPU#1: ksoftirqd/1/23
Modules linked in:
CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:inet_sock_destruct+0x62d/0x740
Code: 0f 0b 90 e9 58 fe ff ff e8 80 eb 9d f7 90 0f 0b 90 e9 8b fe ff ff e8 72 eb 9d f7 90 0f 0b 90 e9 b1 fe ff ff e8 64 eb 9d f7 90 <0f> 0b 90 e9 d7 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 95 fc
RSP: 0018:ffffc900001d7ae0 EFLAGS: 00010246
RAX: ffffffff8a27ca9c RBX: dffffc0000000000 RCX: ffff8881604f5880
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff888112d48b27 R09: 1ffff110225a9164
R10: dffffc0000000000 R11: ffffed10225a9165 R12: ffff888112d48880
R13: ffff888112d48d88 R14: ffff888112d48b0c R15: ffffffff8feb0d40
FS:  0000000000000000(0000) GS:ffff8882a9287000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ade3faba8 CR3: 000000011d504000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __sk_destruct+0x8d/0x9d0
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x840
 run_ksoftirqd+0x36/0x60
 smpboot_thread_fn+0x541/0xa50
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
