------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62b/0x740, CPU#1: syz.0.16431/10363
Modules linked in:
CPU: 1 UID: 0 PID: 10363 Comm: syz.0.16431 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+0x62b/0x740
Code: 0f 0b 90 e9 58 fe ff ff e8 f2 1f 94 f7 90 0f 0b 90 e9 8b fe ff ff e8 e4 1f 94 f7 90 0f 0b 90 e9 b1 fe ff ff e8 d6 1f 94 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: 0000:ffffc90000a08d28 EFLAGS: 00010246
RAX: ffffffff8a3241ea RBX: dffffc0000000000 RCX: ffff888022271dc0
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff888026ce0b27 R09: 1ffff11004d9c164
R10: dffffc0000000000 R11: ffffed1004d9c165 R12: ffff888026ce0880
R13: dffffc0000000000 R14: ffff888026ce0b0c R15: ffffffff8fecdb80
FS:  0000555586864500(0000) GS:ffff8882a9225000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1fd8c06bc8 CR3: 0000000032d86000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __sk_destruct+0x89/0x9d0
 rcu_core+0x78b/0x10a0
 handle_softirqs+0x225/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:do_raw_spin_lock+0x12f/0x2f0
Code: 44 24 40 00 00 00 00 48 89 df be 04 00 00 00 49 89 d6 e8 54 33 91 00 48 8d 7c 24 40 be 04 00 00 00 e8 45 33 91 00 8b 44 24 40 <b9> 01 00 00 00 f0 0f b1 0b 0f 85 20 01 00 00 43 c6 44 34 04 f8 65
RSP: 0000:ffffc9002b0af940 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffff888024463180 RCX: ffffffff81a2b5ab
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9002b0af980
RBP: ffffc9002b0af9f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52005615f30 R12: 1ffff92005615f2c
R13: ffff888024463188 R14: dffffc0000000000 R15: 1ffff1100488c631
 pte_offset_map_lock+0x13d/0x210
 do_wp_page+0x3841/0x4c70
 handle_mm_fault+0x1490/0x3080
 do_user_addr_fault+0xa4d/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f1fd88507fc
Code: 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 41 38 3c 10 74 0b 41 88 3c 10 31 c0 <49> 89 34 d1 c3 b8 01 00 00 00 c3 66 0f 1f 84 00 00 00 00 00 48 83
RSP: 002b:00007fff298d9738 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff81fa2979 RCX: 0000000000000000
RDX: 0000000000000979 RSI: ffffffff81fa2979 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f1fd8c00000 R09: 00007f1fd8c02000
R10: 0000000081fa297d R11: 0000000000000000 R12: 00007f1fd8c16038
R13: 0000000000000049 R14: ffffffff81fa2979 R15: 00007f1fd9745720
 </TASK>
