------------[ 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/1955
Modules linked in:
CPU: 1 UID: 0 PID: 1955 Comm: modprobe Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162
Code: 2f 4d ff e9 06 fd ff ff e8 fa 08 ff f7 90 0f 0b 90 e9 35 fe ff ff e8 ec 08 ff f7 90 0f 0b 90 e9 c5 fe ff ff e8 de 08 ff f7 90 <0f> 0b 90 e9 04 ff ff ff e8 d0 08 ff f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000a08d88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88807d3a4400 RCX: ffffffff8a0983e7
RDX: ffff88802819dc40 RSI: ffffffff8a0984e2 RDI: ffff88802819dc40
RBP: 0000000000000090 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000090 R11: 0000000000000000 R12: ffff88807d3a4400
R13: ffff88807d3a4490 R14: ffffffff81ee137d R15: 0000000000000009
FS:  00007f9b5784dc80(0000) GS:ffff888124470000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560bd3d28008 CR3: 0000000042ca6000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0xab0 net/core/sock.c:2352
 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:string+0x218/0x4d0 lib/vsprintf.c:738
Code: 4c 89 ea 44 89 fe e8 37 75 ff ff 48 89 c3 e8 0f 98 82 f6 48 8b 4c 24 10 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 00 00 00 <48> 8b 44 24 78 65 48 2b 05 33 0a 85 08 0f 85 88 02 00 00 48 83 ec
RSP: 0018:ffffc900063e7958 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: ffff888079cdc2a4 RCX: 1ffff92000c7cf2f
RDX: ffff88802819dc40 RSI: ffffffff8b85f5b1 RDI: ffff88802819dc40
RBP: ffffffff8bc5ae26 R08: 0000000000000004 R09: 0000000000000005
R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000000
R13: ffff888079cdd000 R14: ffffffff8bc5ae20 R15: 0000000000000005
 vsnprintf+0x422/0x1240 lib/vsprintf.c:2948
 seq_vprintf fs/seq_file.c:392 [inline]
 seq_printf+0x1a4/0x250 fs/seq_file.c:407
 filesystems_proc_show+0xad/0x110 fs/filesystems.c:245
 seq_read_iter+0x32f/0x1270 fs/seq_file.c:231
 proc_reg_read_iter+0x220/0x310 fs/proc/inode.c:299
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x825/0xb30 fs/read_write.c:574
 ksys_read+0x12a/0x250 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9b5799d407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffdc1ce1f80 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f9b5784dc80 RCX: 00007f9b5799d407
RDX: 0000000000000400 RSI: 0000560bd3d28500 RDI: 0000000000000000
RBP: 00007f9b57ae5ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdc1ce2068
R13: 00007f9b57ae5ea0 R14: 00007f9b578e94d0 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 89 ea             	mov    %r13,%rdx
   3:	44 89 fe             	mov    %r15d,%esi
   6:	e8 37 75 ff ff       	call   0xffff7542
   b:	48 89 c3             	mov    %rax,%rbx
   e:	e8 0f 98 82 f6       	call   0xf6829822
  13:	48 8b 4c 24 10       	mov    0x10(%rsp),%rcx
  18:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1f:	fc ff df
  22:	48 c7 04 01 00 00 00 	movq   $0x0,(%rcx,%rax,1)
  29:	00
* 2a:	48 8b 44 24 78       	mov    0x78(%rsp),%rax <-- trapping instruction
  2f:	65 48 2b 05 33 0a 85 	sub    %gs:0x8850a33(%rip),%rax        # 0x8850a6a
  36:	08
  37:	0f 85 88 02 00 00    	jne    0x2c5
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	ec                   	in     (%dx),%al