------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62d/0x740, CPU#1: syz.0.163/6437
Modules linked in:
CPU: 1 UID: 0 PID: 6437 Comm: syz.0.163 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 a0 89 9e f7 90 0f 0b 90 e9 8b fe ff ff e8 92 89 9e f7 90 0f 0b 90 e9 b1 fe ff ff e8 84 89 9e 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:ffffc90000a08d20 EFLAGS: 00010246
RAX: ffffffff8a2735ec RBX: dffffc0000000000 RCX: ffff8881763e9d80
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff888100f868a7 R09: 1ffff110201f0d14
R10: dffffc0000000000 R11: ffffed10201f0d15 R12: ffff888100f86600
R13: ffff888100f86b08 R14: ffff888100f8688c R15: ffffffff8feaea80
FS:  00007f13a4f9a6c0(0000) GS:ffff8882a928f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b337ffff8 CR3: 000000016e4b2000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __sk_destruct+0x8d/0x9d0
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/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:is_bpf_text_address+0x298/0x2b0
Code: 48 81 fb 20 02 00 00 40 0f 95 c5 40 20 c5 48 c7 c7 60 cd 95 8e 48 8b 74 24 08 e8 a3 2a cc ff e8 ae d7 d5 ff 89 e8 48 83 c4 10 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 0f 1f 84 00 00 00
RSP: 0018:ffffc90007b8f280 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e219b9d RDI: ffff8881763e9d80
RBP: 0000000000000000 R08: ffffffff81d5b2a6 R09: ffffffff8e95cd60
R10: ffffc90007b8f358 R11: ffffffff81b0e910 R12: 0000000000000276
R13: dffffc0000000000 R14: 00007f13a419cdd9 R15: 0000000000000000
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x30
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfb/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c5/0x640
 do_check_common+0x3d5d/0x5780
 bpf_check+0x3fea/0x49f0
 bpf_prog_load+0x1406/0x1a10
 __sys_bpf+0x618/0x950
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13a419cdd9
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:00007f13a4f9a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f13a4416090 RCX: 00007f13a419cdd9
RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005
RBP: 00007f13a4232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f13a4416128 R14: 00007f13a4416090 R15: 00007ffc6e367ba8
 </TASK>
