------------[ 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#1: modprobe/12465
Modules linked in:
CPU: 1 UID: 0 PID: 12465 Comm: modprobe Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162
Code: 32 4d ff e9 06 fd ff ff e8 5a 44 ff f7 90 0f 0b 90 e9 35 fe ff ff e8 4c 44 ff f7 90 0f 0b 90 e9 c5 fe ff ff e8 3e 44 ff f7 90 <0f> 0b 90 e9 04 ff ff ff e8 30 44 ff f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0000:ffffc90000a08d88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88802e138000 RCX: ffffffff8a096c47
RDX: ffff888037788000 RSI: ffffffff8a096d42 RDI: ffff888037788000
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000000 R12: ffff88802e138000
R13: ffff88802e138090 R14: ffffffff81ee33bd R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888124487000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ca513c318 CR3: 0000000052c10000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0xab0 net/core/sock.c:2357
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
 handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:mem_cgroup_exit_user_fault include/linux/memcontrol.h:1898 [inline]
RIP: 0010:handle_mm_fault+0x606/0xa30 mm/memory.c:6749
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 22 04 00 00 48 8b 7d 10 48 8b 54 24 08 48 89 ee 44 89 e1 e8 d1 ca 14 00 89 c5 e9 77 fd ff ff <e8> 35 7c ab ff 44 0f b6 ab f0 05 00 00 31 ff 41 83 e5 40 44 89 ee
RSP: 0000:ffffc90012e4fe40 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff888037788000 RCX: ffffffff825d3319
RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff888037788000
RBP: 0000000000000100 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000000 R12: 0000000000001254
R13: 0000000000000000 R14: 0000000000000040 R15: 0000000000000000
 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f3ca53ef652
Code: 0f 1f 84 00 00 00 00 00 3d 53 e5 74 64 75 0e 48 89 da 44 89 e6 4c 89 ef e8 5b f2 ff ff 49 3b 9d e0 02 00 00 0f 84 8e 01 00 00 <8b> 43 c8 48 83 eb 38 83 f8 04 75 d2 48 8b 53 10 49 8b 45 00 4c 8b
RSP: 002b:00007ffc219fd750 EFLAGS: 00010287
RAX: 0000000000000062 RBX: 00007f3ca513c350 RCX: 000000000000000e
RDX: 00007f3ca513c040 RSI: 0000000000000006 RDI: 000000006fffffff
RBP: 00007ffc219fdbc0 R08: 000000000000000f R09: 00000000effffef5
R10: 0000000070000029 R11: 00007ffc219fd750 R12: 0000000000000000
R13: 00007f3ca53de5f0 R14: 00007ffc219fdc60 R15: 00007f3ca530f000
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 22 04 00 00    	jne    0x430
   e:	48 8b 7d 10          	mov    0x10(%rbp),%rdi
  12:	48 8b 54 24 08       	mov    0x8(%rsp),%rdx
  17:	48 89 ee             	mov    %rbp,%rsi
  1a:	44 89 e1             	mov    %r12d,%ecx
  1d:	e8 d1 ca 14 00       	call   0x14caf3
  22:	89 c5                	mov    %eax,%ebp
  24:	e9 77 fd ff ff       	jmp    0xfffffda0
* 29:	e8 35 7c ab ff       	call   0xffab7c63 <-- trapping instruction
  2e:	44 0f b6 ab f0 05 00 	movzbl 0x5f0(%rbx),%r13d
  35:	00
  36:	31 ff                	xor    %edi,%edi
  38:	41 83 e5 40          	and    $0x40,%r13d
  3c:	44 89 ee             	mov    %r13d,%esi