------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62d/0x740 net/ipv4/af_inet.c:162, CPU#1: syz-executor/25696
Modules linked in:
CPU: 1 UID: 0 PID: 25696 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:inet_sock_destruct+0x62d/0x740 net/ipv4/af_inet.c:162
Code: 0f 0b 90 e9 58 fe ff ff e8 d0 c3 9e f7 90 0f 0b 90 e9 8b fe ff ff e8 c2 c3 9e f7 90 0f 0b 90 e9 b1 fe ff ff e8 b4 c3 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:ffffc90000a08d48 EFLAGS: 00010246
RAX: ffffffff8a26eabc RBX: dffffc0000000000 RCX: ffff8880285ddb80
RDX: 0000000000000100 RSI: 0000000000000090 RDI: 0000000000000000
RBP: 0000000000000090 R08: ffff88805994e027 R09: 1ffff1100b329c04
R10: dffffc0000000000 R11: ffffed100b329c05 R12: ffff88805994dd80
R13: dffffc0000000000 R14: ffff88805994e00c R15: ffffffff8fca6c80
FS:  0000555578795500(0000) GS:ffff888125555000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555787954e8 CR3: 0000000048faa000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0x880 net/core/sock.c:2350
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:is_idle_task include/linux/sched.h:1942 [inline]
RIP: 0010:__might_resched+0x11d/0x4d0 kernel/sched/core.c:8853
Code: 9b 02 00 00 41 8b 04 24 c1 e0 08 44 01 e8 39 d8 75 48 9c 58 a9 00 02 00 00 74 3f 4d 8d 6e 2c 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 d7 02 00 00 41 f6 45 00 02 75 21 4d 8d ae e8 0a 00 00
RSP: 0018:ffffc900033a7890 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e19b8e3 RDI: ffffffff8c27ca80
RBP: dffffc0000000000 R08: ffffffff901188b7 R09: 1ffffffff2023116
R10: dffffc0000000000 R11: fffffbfff2023117 R12: ffff8880285de044
R13: ffff8880285ddbac R14: ffff8880285ddb80 R15: 1ffff110050bbc08
 __might_fault+0x76/0x130 mm/memory.c:7216
 _copy_from_iter+0x100/0x1670 lib/iov_iter.c:271
 copy_page_from_iter+0xdd/0x170 lib/iov_iter.c:434
 anon_pipe_write+0xa0b/0x1480 fs/pipe.c:522
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2152b5d04e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fffc2582f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000555578795500 RCX: 00007f2152b5d04e
RDX: 0000000000000004 RSI: 00007fffc2583070 RDI: 00000000000000f8
RBP: 00007fffc258301c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000142
R13: 00000000000927c0 R14: 00000000000c7bf8 R15: 00007fffc2583070
 </TASK>
----------------
Code disassembly (best guess):
   0:	9b                   	fwait
   1:	02 00                	add    (%rax),%al
   3:	00 41 8b             	add    %al,-0x75(%rcx)
   6:	04 24                	add    $0x24,%al
   8:	c1 e0 08             	shl    $0x8,%eax
   b:	44 01 e8             	add    %r13d,%eax
   e:	39 d8                	cmp    %ebx,%eax
  10:	75 48                	jne    0x5a
  12:	9c                   	pushf
  13:	58                   	pop    %rax
  14:	a9 00 02 00 00       	test   $0x200,%eax
  19:	74 3f                	je     0x5a
  1b:	4d 8d 6e 2c          	lea    0x2c(%r14),%r13
  1f:	4c 89 e8             	mov    %r13,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 d7 02 00 00    	jne    0x309
  32:	41 f6 45 00 02       	testb  $0x2,0x0(%r13)
  37:	75 21                	jne    0x5a
  39:	4d 8d ae e8 0a 00 00 	lea    0xae8(%r14),%r13