------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62d/0x740, CPU#0: syz.4.1007/8022
Modules linked in:
CPU: 0 UID: 0 PID: 8022 Comm: syz.4.1007 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 c0 9e f7 90 0f 0b 90 e9 8b fe ff ff e8 92 c0 9e f7 90 0f 0b 90 e9 b1 fe ff ff e8 84 c0 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:ffffc90000007d20 EFLAGS: 00010246
RAX: ffffffff8a26e3bc RBX: dffffc0000000000 RCX: ffff88810b8e3b00
RDX: 0000000000000100 RSI: 0000000000000090 RDI: 0000000000000000
RBP: 0000000000000090 R08: ffff8881bd8d93a7 R09: 1ffff11037b1b274
R10: dffffc0000000000 R11: ffffed1037b1b275 R12: ffff8881bd8d9100
R13: ffff8881bd8d9608 R14: ffff8881bd8d938c R15: ffffffff8feaef80
FS:  00007f1587b856c0(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1586e4f0d1 CR3: 00000001bd296000 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:unwind_next_frame+0x1991/0x2550
Code: c0 0f 85 91 0a 00 00 48 89 f8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 aa 0a 00 00 49 0f bf 04 24 48 01 c6 4c 89 f7 48 89 da eb 3f <48> 8d 5f 02 48 83 c7 03 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc900039e7298 EFLAGS: 00000246
RAX: ffffffff90d2ec02 RBX: ffffc900039e73b8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90d2ebfe
RBP: dffffc0000000000 R08: ffffc900039e73c7 R09: 0000000000000000
R10: ffffc900039e73b8 R11: fffff5200073ce79 R12: ffffc900039e7710
R13: 1ffff9200073ce6f R14: ffffc900039e7368 R15: 1ffffffff21a5d80
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x31c/0x660
 kmem_cache_free+0x156/0x650
 tear_down_vmas+0x312/0x520
 exit_mmap+0x4b6/0x9e0
 __mmput+0x118/0x430
 exit_mm+0x18e/0x250
 do_exit+0x6a2/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1586d9cdd9
Code: Unable to access opcode bytes at 0x7f1586d9cdaf.
RSP: 002b:00007f1587b850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f1587015fa8 RCX: 00007f1586d9cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1587015fa8
RBP: 00007f1587015fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1587016038 R14: 00007ffc2b2d5f60 R15: 00007ffc2b2d6048
 </TASK>
