------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162, CPU#0: syz.1.2254/12552
Modules linked in:
CPU: 0 UID: 0 PID: 12552 Comm: syz.1.2254 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162
Code: 36 4d ff e9 06 fd ff ff e8 fa 5d ff f7 90 0f 0b 90 e9 35 fe ff ff e8 ec 5d ff f7 90 0f 0b 90 e9 c5 fe ff ff e8 de 5d ff f7 90 <0f> 0b 90 e9 04 ff ff ff e8 d0 5d ff f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000007d88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88802d7abb80 RCX: ffffffff8a093187
RDX: ffff888020774a80 RSI: ffffffff8a093282 RDI: ffff888020774a80
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000000 R12: ffff88802d7abb80
R13: ffff88802d7abc10 R14: ffffffff81ee127d R15: 0000000000000000
FS:  00007f12c2ff66c0(0000) GS:ffff888124383000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5698784d58 CR3: 000000008f9a2000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0xab0 net/core/sock.c:2352
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
 handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x51/0x70 kernel/kcov.c:222
Code: 00 74 05 e9 51 ec 83 09 8b 82 ec 16 00 00 85 c0 74 f1 8b 82 c8 16 00 00 83 f8 02 75 e6 48 8b 8a d0 16 00 00 8b 92 cc 16 00 00 <48> 8b 01 48 83 c0 01 48 39 d0 73 cd 48 89 01 48 89 34 c1 e9 17 ec
RSP: 0018:ffffc9000747f288 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 000000000000001f RCX: ffffc90003cba000
RDX: 0000000000080000 RSI: ffffffff8249016e RDI: ffff888020774a80
RBP: 000000000000001e R08: 0000000000000004 R09: 000000000000001f
R10: 000000000000001e R11: 0000000000000000 R12: 0000000000000078
R13: dffffc0000000000 R14: ffff8880b8433eb0 R15: ffff8880b8433fa8
 folios_put_refs+0xfe/0xa90 mm/swap.c:964
 folios_put include/linux/mm.h:2149 [inline]
 folio_batch_move_lru+0x344/0x7d0 mm/swap.c:179
 __folio_batch_add_and_move+0x348/0xc60 mm/swap.c:196
 shmem_alloc_and_add_folio+0x72a/0xd40 mm/shmem.c:2034
 shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
 shmem_fault+0x1f9/0xa20 mm/shmem.c:2765
 __do_fault+0x10b/0x440 mm/memory.c:5474
 do_read_fault mm/memory.c:5909 [inline]
 do_fault+0xa99/0x1750 mm/memory.c:6043
 do_pte_missing mm/memory.c:4566 [inline]
 handle_pte_fault mm/memory.c:6427 [inline]
 __handle_mm_fault+0x187d/0x2a00 mm/memory.c:6565
 handle_mm_fault+0x37b/0xa30 mm/memory.c:6734
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1178/0x32a0 mm/gup.c:1428
 populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860
 __mm_populate+0x107/0x3a0 mm/gup.c:1963
 mm_populate include/linux/mm.h:4137 [inline]
 vm_mmap_pgoff+0x37f/0x470 mm/util.c:586
 ksys_mmap_pgoff+0xe4/0x610 mm/mmap.c:606
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f12c4d9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f12c2ff6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f12c5015fa0 RCX: 00007f12c4d9ce59
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f12c4e32d6f R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f12c5016038 R14: 00007f12c5015fa0 R15: 00007ffdff99c398
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	74 05                	je     0x7
   2:	e9 51 ec 83 09       	jmp    0x983ec58
   7:	8b 82 ec 16 00 00    	mov    0x16ec(%rdx),%eax
   d:	85 c0                	test   %eax,%eax
   f:	74 f1                	je     0x2
  11:	8b 82 c8 16 00 00    	mov    0x16c8(%rdx),%eax
  17:	83 f8 02             	cmp    $0x2,%eax
  1a:	75 e6                	jne    0x2
  1c:	48 8b 8a d0 16 00 00 	mov    0x16d0(%rdx),%rcx
  23:	8b 92 cc 16 00 00    	mov    0x16cc(%rdx),%edx
* 29:	48 8b 01             	mov    (%rcx),%rax <-- trapping instruction
  2c:	48 83 c0 01          	add    $0x1,%rax
  30:	48 39 d0             	cmp    %rdx,%rax
  33:	73 cd                	jae    0x2
  35:	48 89 01             	mov    %rax,(%rcx)
  38:	48 89 34 c1          	mov    %rsi,(%rcx,%rax,8)
  3c:	e9                   	.byte 0xe9
  3d:	17                   	(bad)
  3e:	ec                   	in     (%dx),%al