------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62b/0x740 net/ipv4/af_inet.c:162, CPU#1: syz.1.649/8487
Modules linked in:
CPU: 1 UID: 0 PID: 8487 Comm: syz.1.649 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:inet_sock_destruct+0x62b/0x740 net/ipv4/af_inet.c:162
Code: 0f 0b 90 e9 58 fe ff ff e8 62 e4 a0 f7 90 0f 0b 90 e9 8b fe ff ff e8 54 e4 a0 f7 90 0f 0b 90 e9 b1 fe ff ff e8 46 e4 a0 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:ffffc90000a08d28 EFLAGS: 00010246
RAX: ffffffff8a2511da RBX: dffffc0000000000 RCX: ffff8880784b9f00
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff888055ec35a7 R09: 1ffff1100abd86b4
R10: dffffc0000000000 R11: ffffed100abd86b5 R12: ffff888055ec3300
R13: dffffc0000000000 R14: ffff888055ec358c R15: ffffffff8feb2640
FS:  0000000000000000(0000) GS:ffff88812537c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000579030 CR3: 0000000075f28000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __sk_destruct+0x89/0x9d0 net/core/sock.c:2357
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x78b/0x10a0 kernel/rcu/tree.c:2897
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:filter_irq_stacks+0x32/0xa0 kernel/stacktrace.c:397
Code: 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 ff e8 84 38 80 00 49 8b 04 de 48 3d 30 02 00 81 0f 93
RSP: 0018:ffffc9000206f118 EFLAGS: 00000246
RAX: 1ffff9200040de4a RBX: 000000000000000e RCX: 0000000000000001
RDX: 0000000000002000 RSI: 000000000000000f RDI: ffffc9000206f1e0
RBP: ffffc9000206f2e0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000206f0b8 R11: ffffffff81b10630 R12: 000000000000000f
R13: dffffc0000000000 R14: ffffc9000206f1e0 R15: ffffc9000206f250
 stack_depot_save_flags+0x33/0x800 lib/stackdepot.c:667
 save_stack+0x130/0x230 mm/page_owner.c:166
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 free_unref_folios+0xdb2/0x14d0 mm/page_alloc.c:2999
 folios_put_refs+0xa59/0xba0 mm/swap.c:1008
 free_pages_and_swap_cache+0x2ba/0x490 mm/swap_state.c:401
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:151 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:417 [inline]
 tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424
 tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:549
 exit_mmap+0x4b2/0x9f0 mm/mmap.c:1313
 __mmput+0x118/0x420 kernel/fork.c:1181
 exit_mm+0x221/0x2d0 kernel/exit.c:610
 do_exit+0x6cd/0x2360 kernel/exit.c:992
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
 get_signal+0x121b/0x12c0 kernel/signal.c:3038
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b6a39ce59
Code: Unable to access opcode bytes at 0x7f6b6a39ce2f.
RSP: 002b:00007f6b681910e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6b6a616278 RCX: 00007f6b6a39ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6b6a616278
RBP: 00007f6b6a616270 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b6a616308 R14: 00007ffddfa2a250 R15: 00007ffddfa2a338
 </TASK>
----------------
Code disassembly (best guess):
   0:	41 55                	push   %r13
   2:	41 54                	push   %r12
   4:	53                   	push   %rbx
   5:	85 f6                	test   %esi,%esi
   7:	74 70                	je     0x79
   9:	49 89 fe             	mov    %rdi,%r14
   c:	41 89 f4             	mov    %esi,%r12d
   f:	31 db                	xor    %ebx,%ebx
  11:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  18:	fc ff df
  1b:	49 89 ff             	mov    %rdi,%r15
  1e:	4c 89 f8             	mov    %r15,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
* 2a:	74 08                	je     0x34 <-- trapping instruction
  2c:	4c 89 ff             	mov    %r15,%rdi
  2f:	e8 84 38 80 00       	call   0x8038b8
  34:	49 8b 04 de          	mov    (%r14,%rbx,8),%rax
  38:	48 3d 30 02 00 81    	cmp    $0xffffffff81000230,%rax
  3e:	0f                   	.byte 0xf
  3f:	93                   	xchg   %eax,%ebx