------------[ 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.0.2771/16531
Modules linked in:
CPU: 1 UID: 0 PID: 16531 Comm: syz.0.2771 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:inet_sock_destruct+0x62b/0x740 net/ipv4/af_inet.c:162
Code: 0f 0b 90 e9 58 fe ff ff e8 72 57 7a f7 90 0f 0b 90 e9 8b fe ff ff e8 64 57 7a f7 90 0f 0b 90 e9 b1 fe ff ff e8 56 57 7a 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: ffffffff8a4c1aea RBX: dffffc0000000000 RCX: ffff888066d5be00
RDX: 0000000000000100 RSI: 0000000000000090 RDI: 0000000000000000
RBP: 0000000000000090 R08: ffff888060aff127 R09: 1ffff1100c15fe24
R10: dffffc0000000000 R11: ffffed100c15fe25 R12: ffff888060afee80
R13: dffffc0000000000 R14: ffff888060aff10c R15: ffffffff9010d5c0
FS:  0000000000000000(0000) GS:ffff88812505e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33e63fff CR3: 000000000e946000 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:lock_is_held_type+0x106/0x150 kernel/locking/lockdep.c:5945
Code: 1a 00 00 b8 ff ff ff ff 65 0f c1 05 b4 6c 9d 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 48 c7
RSP: 0018:ffffc90006c272e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8e4b068c RDI: ffffffff8c4bd380
RBP: 00000000ffffffff R08: ffffffff823fadc4 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000246
R13: ffff888066d5be00 R14: ffffffff8eb59c60 R15: 0000000000000001
 lookup_page_ext mm/page_ext.c:258 [inline]
 page_ext_lookup+0xe7/0x180 mm/page_ext.c:513
 page_ext_iter_begin include/linux/page_ext.h:137 [inline]
 page_table_check_clear+0x212/0x500 mm/page_table_check.c:78
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
 zap_present_folio_ptes mm/memory.c:1648 [inline]
 zap_present_ptes mm/memory.c:1730 [inline]
 do_zap_pte_range mm/memory.c:1832 [inline]
 zap_pte_range mm/memory.c:1934 [inline]
 zap_pmd_range mm/memory.c:2020 [inline]
 zap_pud_range mm/memory.c:2048 [inline]
 zap_p4d_range mm/memory.c:2069 [inline]
 __zap_vma_range+0x39bb/0x4f10 mm/memory.c:2109
 unmap_vmas+0x390/0x550 mm/memory.c:2178
 exit_mmap+0x293/0x9f0 mm/mmap.c:1300
 __mmput+0x118/0x420 kernel/fork.c:1187
 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: 0033:0x7fa09359de59
Code: Unable to access opcode bytes at 0x7fa09359de2f.
RSP: 002b:00007fa0943860e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fa093825fa8 RCX: 00007fa09359de59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa093825fa8
RBP: 00007fa093825fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa093826038 R14: 00007ffc8b260b10 R15: 00007ffc8b260bf8
 </TASK>
----------------
Code disassembly (best guess):
   0:	1a 00                	sbb    (%rax),%al
   2:	00 b8 ff ff ff ff    	add    %bh,-0x1(%rax)
   8:	65 0f c1 05 b4 6c 9d 	xadd   %eax,%gs:0x79d6cb4(%rip)        # 0x79d6cc4
   f:	07
  10:	83 f8 01             	cmp    $0x1,%eax
  13:	75 25                	jne    0x3a
  15:	9c                   	pushf
  16:	58                   	pop    %rax
  17:	a9 00 02 00 00       	test   $0x200,%eax
  1c:	75 39                	jne    0x57
  1e:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  25:	74 01                	je     0x28
  27:	fb                   	sti
  28:	89 d8                	mov    %ebx,%eax
* 2a:	5b                   	pop    %rbx <-- trapping instruction
  2b:	41 5c                	pop    %r12
  2d:	41 5d                	pop    %r13
  2f:	41 5e                	pop    %r14
  31:	41 5f                	pop    %r15
  33:	5d                   	pop    %rbp
  34:	c3                   	ret
  35:	cc                   	int3
  36:	cc                   	int3
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	90                   	nop
  3b:	0f 0b                	ud2
  3d:	90                   	nop
  3e:	48                   	rex.W
  3f:	c7                   	.byte 0xc7