------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:163 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:163, CPU#0: syz.2.2895/15929
Modules linked in:
CPU: 0 UID: 0 PID: 15929 Comm: syz.2.2895 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:163
Code: f1 4e ff e9 06 fd ff ff e8 7a 81 ff f7 90 0f 0b 90 e9 35 fe ff ff e8 6c 81 ff f7 90 0f 0b 90 e9 c5 fe ff ff e8 5e 81 ff f7 90 <0f> 0b 90 e9 04 ff ff ff e8 50 81 ff f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000007d98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803524dd80 RCX: ffffffff8a095ee7
RDX: ffff88802a304980 RSI: ffffffff8a095fe2 RDI: ffff88802a304980
RBP: 0000000000000090 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000090 R11: 0000000000000000 R12: ffff88803524dd80
R13: ffff88803524de10 R14: ffffffff81eea6fd R15: 0000000000000006
FS:  0000000000000000(0000) GS:ffff8880d633f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc3f69ec0 CR3: 0000000045b93000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000006f6d7f8b
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __sk_destruct+0x85/0xbb0 net/core/sock.c:2350
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
 handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xef/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+0xa3/0xc0 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:folios_put_refs+0x6f/0x840 mm/swap.c:952
Code: 40 78 43 f9 8d 48 c7 44 24 48 c0 97 47 82 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 00 f3 f3 f3 65 48 8b 05 d9 77 c6 11 <48> 89 84 24 b0 00 00 00 31 c0 e8 02 49 c1 ff 4c 89 f0 48 c7 44 24
RSP: 0018:ffffc9000c11f118 EFLAGS: 00000282
RAX: 18bd753c924d1f00 RBX: dffffc0000000000 RCX: ffffffff826bef21
RDX: ffff88802a304980 RSI: ffffc9000c11f248 RDI: ffffc9000c11f2e8
RBP: dffffc0000000000 R08: 0000000000000001 R09: 000000000000001f
R10: 000000000000001f R11: 0000000000000000 R12: 0000000000000116
R13: 0000000000000000 R14: ffffc9000c11f2e8 R15: 000000000000001e
 free_pages_and_swap_cache+0x242/0x480 mm/swap_state.c:423
 __tlb_batch_free_encoded_pages+0xe9/0x280 mm/mmu_gather.c:138
 tlb_batch_pages_flush mm/mmu_gather.c:151 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:398 [inline]
 tlb_flush_mmu+0xe9/0x590 mm/mmu_gather.c:405
 zap_pte_range mm/memory.c:1968 [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+0x2333/0x4840 mm/memory.c:2091
 unmap_single_vma+0x153/0x240 mm/memory.c:2133
 unmap_vmas+0x295/0x590 mm/memory.c:2171
 exit_mmap+0x1ef/0xa30 mm/mmap.c:1302
 __mmput+0x12a/0x410 kernel/fork.c:1175
 mmput+0x67/0x80 kernel/fork.c:1198
 exit_mm kernel/exit.c:581 [inline]
 do_exit+0x819/0x2b60 kernel/exit.c:964
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1118
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe33419c799
Code: Unable to access opcode bytes at 0x7fe33419c76f.
RSP: 002b:00007fe3350770e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe334415fa8 RCX: 00007fe33419c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe334415fa8
RBP: 00007fe334415fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe334416038 R14: 00007ffdb1eee600 R15: 00007ffdb1eee6e8
 </TASK>
----------------
Code disassembly (best guess):
   0:	40 78 43             	rex js 0x46
   3:	f9                   	stc
   4:	8d 48 c7             	lea    -0x39(%rax),%ecx
   7:	44 24 48             	rex.R and $0x48,%al
   a:	c0 97 47 82 c7 00 f1 	rclb   $0xf1,0xc78247(%rdi)
  11:	f1                   	int1
  12:	f1                   	int1
  13:	f1                   	int1
  14:	c7 40 04 00 f2 f2 f2 	movl   $0xf2f2f200,0x4(%rax)
  1b:	c7 40 08 00 f3 f3 f3 	movl   $0xf3f3f300,0x8(%rax)
  22:	65 48 8b 05 d9 77 c6 	mov    %gs:0x11c677d9(%rip),%rax        # 0x11c67803
  29:	11
* 2a:	48 89 84 24 b0 00 00 	mov    %rax,0xb0(%rsp) <-- trapping instruction
  31:	00
  32:	31 c0                	xor    %eax,%eax
  34:	e8 02 49 c1 ff       	call   0xffc1493b
  39:	4c 89 f0             	mov    %r14,%rax
  3c:	48                   	rex.W
  3d:	c7                   	.byte 0xc7
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24