syzbot

------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162, CPU#2: syz.0.26/5961
Modules linked in:
CPU: 2 UID: 0 PID: 5961 Comm: syz.0.26 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162
Code: d3 4b ff e9 06 fd ff ff e8 4a f1 d2 f7 90 0f 0b 90 e9 35 fe ff ff e8 3c f1 d2 f7 90 0f 0b 90 e9 c5 fe ff ff e8 2e f1 d2 f7 90 <0f> 0b 90 e9 04 ff ff ff e8 20 f1 d2 f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000648db0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880324b4400 RCX: ffffffff8a36ea77
RDX: ffff888034ccca80 RSI: ffffffff8a36eb72 RDI: ffff888034ccca80
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000000 R12: ffff8880324b4400
R13: ffff8880324b4490 R14: ffffffff81ef216d R15: 0000000000000003
FS:  00007faec7ddd6c0(0000) GS:ffff8880d5fe8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faec7ddcff8 CR3: 0000000053f24000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0xab0 net/core/sock.c:2357
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2897
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 do_softirq kernel/softirq.c:523 [inline]
 do_softirq+0xac/0xe0 kernel/softirq.c:510
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 xdp_test_run_batch.constprop.0+0x1433/0x1ca0 net/bpf/test_run.c:356
 bpf_test_run_xdp_live+0x367/0x760 net/bpf/test_run.c:378
 bpf_prog_test_run_xdp+0xd7d/0x1670 net/bpf/test_run.c:1463
 bpf_prog_test_run kernel/bpf/syscall.c:4859 [inline]
 __sys_bpf+0x2a12/0x4e80 kernel/bpf/syscall.c:6436
 __do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
 __x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6534
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faec6f9de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faec7ddd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007faec7225fa0 RCX: 00007faec6f9de59
RDX: 0000000000000048 RSI: 0000200000000600 RDI: 000000000000000a
RBP: 00007faec7033e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faec7226038 R14: 00007faec7225fa0 R15: 00007ffe91aa6518
 </TASK>