------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:163 at inet_sock_destruct+0x62d/0x740 net/ipv4/af_inet.c:163, CPU#0: syz-executor/5819
Modules linked in:
CPU: 0 UID: 0 PID: 5819 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:inet_sock_destruct+0x62d/0x740 net/ipv4/af_inet.c:163
Code: 0f 0b 90 e9 58 fe ff ff e8 90 14 a0 f7 90 0f 0b 90 e9 8b fe ff ff e8 82 14 a0 f7 90 0f 0b 90 e9 b1 fe ff ff e8 74 14 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:ffffc90000007d48 EFLAGS: 00010246
RAX: ffffffff8a258c8c RBX: dffffc0000000000 RCX: ffff888031ea5b80
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff8880370a13a7 R09: 1ffff11006e14274
R10: dffffc0000000000 R11: ffffed1006e14275 R12: ffff8880370a1100
R13: dffffc0000000000 R14: ffff8880370a138c R15: ffffffff8fcaaf40
FS:  00005555856d8500(0000) GS:ffff88812545c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6fe41eb4b8 CR3: 00000000686de000 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:page_table_check_set+0x242/0x610 mm/page_table_check.c:-1
Code: c7 c7 d8 7e 1a 8e e8 5d b8 f3 ff 4c 2b 3d fe 53 de 0b 49 c1 ff 06 4d 89 fd 4c 89 ff e8 b7 e4 ff ff 48 89 c5 48 85 c0 0f 95 c3 <31> ff 4c 89 f6 e8 e4 7a 89 ff 4d 85 f6 0f 95 c0 84 c3 0f 84 e3 01
RSP: 0018:ffffc90003f0f2c8 EFLAGS: 00000286
RAX: ffff88801da55300 RBX: 0000000000000001 RCX: ffff888031ea5b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801da55300 R08: ffffffff823c29f8 R09: ffffffff8e75e520
R10: dffffc0000000000 R11: fffff9400033bb81 R12: ffffffff823c29f8
R13: 0000000000067770 R14: 0000000000000001 R15: 0000000000067770
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:413 [inline]
 __copy_present_ptes mm/memory.c:1115 [inline]
 copy_present_ptes mm/memory.c:1194 [inline]
 copy_pte_range mm/memory.c:1317 [inline]
 copy_pmd_range+0x4f5a/0x8050 mm/memory.c:1405
 copy_pud_range mm/memory.c:1442 [inline]
 copy_p4d_range mm/memory.c:1466 [inline]
 copy_page_range+0xbe8/0x11f0 mm/memory.c:1552
 dup_mmap+0xf40/0x1d90 mm/mmap.c:1841
 dup_mm kernel/fork.c:1531 [inline]
 copy_mm+0x13b/0x4a0 kernel/fork.c:1583
 copy_process+0x18b6/0x3cd0 kernel/fork.c:2223
 kernel_clone+0x248/0x8e0 kernel/fork.c:2653
 __do_sys_clone kernel/fork.c:2794 [inline]
 __se_sys_clone kernel/fork.c:2778 [inline]
 __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2778
 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: 0033:0x7f87c41c5212
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd3b127720 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd3b127720 RCX: 00007f87c41c5212
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd3b1278ac R08: 0000000000000000 R09: 0000000000000001
R10: 00005555856d87d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 000000000003480b R15: 00007ffd3b127900
 </TASK>
----------------
Code disassembly (best guess):
   0:	c7 c7 d8 7e 1a 8e    	mov    $0x8e1a7ed8,%edi
   6:	e8 5d b8 f3 ff       	call   0xfff3b868
   b:	4c 2b 3d fe 53 de 0b 	sub    0xbde53fe(%rip),%r15        # 0xbde5410
  12:	49 c1 ff 06          	sar    $0x6,%r15
  16:	4d 89 fd             	mov    %r15,%r13
  19:	4c 89 ff             	mov    %r15,%rdi
  1c:	e8 b7 e4 ff ff       	call   0xffffe4d8
  21:	48 89 c5             	mov    %rax,%rbp
  24:	48 85 c0             	test   %rax,%rax
  27:	0f 95 c3             	setne  %bl
* 2a:	31 ff                	xor    %edi,%edi <-- trapping instruction
  2c:	4c 89 f6             	mov    %r14,%rsi
  2f:	e8 e4 7a 89 ff       	call   0xff897b18
  34:	4d 85 f6             	test   %r14,%r14
  37:	0f 95 c0             	setne  %al
  3a:	84 c3                	test   %al,%bl
  3c:	0f                   	.byte 0xf
  3d:	84 e3                	test   %ah,%bl
  3f:	01                   	.byte 0x1