------------[ cut here ]------------
WARNING: net/ipv4/af_inet.c:157 at inet_sock_destruct+0x68c/0x830 net/ipv4/af_inet.c:157, CPU#1: ksoftirqd/1/28
Modules linked in:
CPU: 1 UID: 0 PID: 28 Comm: ksoftirqd/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:inet_sock_destruct+0x68c/0x830 net/ipv4/af_inet.c:157
Code: 0f 0b 90 e9 0a fe ff ff e8 e1 4d cf f7 90 0f 0b 90 e9 56 fe ff ff e8 d3 4d cf f7 90 0f 0b 90 e9 8c fe ff ff e8 c5 4d cf f7 90 <0f> 0b 90 e9 cb fe ff ff e8 47 25 39 f8 e9 cf fc ff ff 4c 89 ff e8
RSP: 0018:ffffc90000677b50 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803bbe4200 RCX: ffffffff89ef9c47
RDX: ffff88801e2e4980 RSI: ffffffff89ef9d7b RDI: 0000000000000005
RBP: 0000000000000090 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000090 R11: 0000000000002ba1 R12: ffff88803bbe4200
R13: ffff88803bbe4290 R14: ffffc90000677c50 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880d69f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005f18 CR3: 0000000058067000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __sk_destruct+0x85/0xbc0 net/core/sock.c:2350
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
 handle_softirqs+0x219/0x950 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>