------------[ 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#0: syz.2.1505/12050
Modules linked in:
CPU: 0 UID: 0 PID: 12050 Comm: syz.2.1505 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:162
Code: 0f 0b 90 e9 58 fe ff ff e8 30 69 9f f7 90 0f 0b 90 e9 8b fe ff ff e8 22 69 9f f7 90 0f 0b 90 e9 b1 fe ff ff e8 14 69 9f 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: ffffffff8a2637ec RBX: dffffc0000000000 RCX: ffff888045579e80
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff88804511c6a7 R09: 1ffff11008a238d4
R10: dffffc0000000000 R11: ffffed1008a238d5 R12: ffff88804511c400
R13: dffffc0000000000 R14: ffff88804511c68c R15: ffffffff8fca5540
FS:  0000000000000000(0000) GS:ffff888125461000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000088 CR3: 000000007f534000 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:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 75 06 0e 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 f1 63 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 56 ec 10 0a cc 48 8d 3d ee 10 73
RSP: 0018:ffffc90004fbf550 EFLAGS: 00000296
RAX: faaf0c593bc10400 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 00000000747a73c7 RSI: ffffffff8e1958a9 RDI: ffffffff8c27c180
RBP: 0000000000000000 R08: ffffffff823c1fa4 R09: ffffffff8e75e520
R10: dffffc0000000000 R11: fffff940003214f1 R12: 0000000000000002
R13: ffffffff8e75e520 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 page_table_check_clear+0x164/0x5f0 mm/page_table_check.c:77
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 get_and_clear_full_ptes include/linux/pgtable.h:846 [inline]
 zap_present_folio_ptes mm/memory.c:1643 [inline]
 zap_present_ptes mm/memory.c:1725 [inline]
 do_zap_pte_range mm/memory.c:1827 [inline]
 zap_pte_range mm/memory.c:1929 [inline]
 zap_pmd_range mm/memory.c:2021 [inline]
 zap_pud_range mm/memory.c:2049 [inline]
 zap_p4d_range mm/memory.c:2070 [inline]
 unmap_page_range+0x33b3/0x48f0 mm/memory.c:2091
 unmap_single_vma mm/memory.c:2133 [inline]
 unmap_vmas+0x48f/0x6a0 mm/memory.c:2171
 exit_mmap+0x280/0xa10 mm/mmap.c:1302
 __mmput+0x118/0x430 kernel/fork.c:1175
 exit_mm+0x168/0x220 kernel/exit.c:581
 do_exit+0x6a2/0x23c0 kernel/exit.c:964
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 __do_sys_exit_group kernel/exit.c:1129 [inline]
 __se_sys_exit_group kernel/exit.c:1127 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1127
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7fe1edf9c799
Code: Unable to access opcode bytes at 0x7fe1edf9c76f.
RSP: 002b:00007ffd76725ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1edf9c799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd76725d0c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000133
R13: 00000000000927c0 R14: 00000000000426bc R15: 00007ffd76725d60
 </TASK>
----------------
Code disassembly (best guess):
   0:	e9 30 ff ff ff       	jmp    0xffffff35
   5:	e8 75 06 0e 0a       	call   0xa0e067f
   a:	f7 c3 00 02 00 00    	test   $0x200,%ebx
  10:	0f 84 38 ff ff ff    	je     0xffffff4e
  16:	65 48 8b 05 f1 63 7a 	mov    %gs:0x117a63f1(%rip),%rax        # 0x117a640f
  1d:	11
  1e:	48 3b 44 24 30       	cmp    0x30(%rsp),%rax
  23:	75 33                	jne    0x58
  25:	fb                   	sti
  26:	48 83 c4 38          	add    $0x38,%rsp
* 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:	e9 56 ec 10 0a       	jmp    0xa10ec8f
  39:	cc                   	int3
  3a:	48                   	rex.W
  3b:	8d                   	.byte 0x8d
  3c:	3d                   	.byte 0x3d
  3d:	ee                   	out    %al,(%dx)
  3e:	10                   	.byte 0x10
  3f:	73                   	.byte 0x73