------------[ 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#1: syz.3.17118/11673
Modules linked in:
CPU: 1 UID: 0 PID: 11673 Comm: syz.3.17118 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: e3 4e ff e9 06 fd ff ff e8 3a 48 ff f7 90 0f 0b 90 e9 35 fe ff ff e8 2c 48 ff f7 90 0f 0b 90 e9 c5 fe ff ff e8 1e 48 ff f7 90 <0f> 0b 90 e9 04 ff ff ff e8 10 48 ff f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc900006a0d98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880302af700 RCX: ffffffff8a09aec7
RDX: ffff888032cda4c0 RSI: ffffffff8a09afc2 RDI: ffff888032cda4c0
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000000 R12: ffff8880302af700
R13: ffff8880302af790 R14: ffffffff81eebbdd R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880d643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31d04ff8 CR3: 00000000483ad000 CR4: 0000000000352ef0
DR0: 0000000000000007 DR1: ffffffffffffff00 DR2: 400000000001001d
DR3: fffffffffffffff6 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:write_comp_data+0x7/0x90 kernel/kcov.c:240
Code: 98 16 00 00 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 59 4f 05 12 <49> 89 f8 49 89 f1 49 89 d2 65 48 8b 3d 30 4f 05 12 a9 00 01 ff 00
RSP: 0018:ffffc90003cbf698 EFLAGS: 00000202
RAX: 0000000080000001 RBX: ffffea0001791a80 RCX: ffffffff82489a0b
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 1ffff92000797ed6 R08: 0000000000000000 R09: fffff940002f2350
R10: ffffea0001791a87 R11: 0000000000000000 R12: ffffea0001791a88
R13: 0000000000000001 R14: ffff88803644bb80 R15: 800000005e46a025
 lru_gen_inc_refs mm/swap.c:397 [inline]
 folio_mark_accessed+0x26b/0x1040 mm/swap.c:460
 zap_present_folio_ptes mm/memory.c:1652 [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+0x1175/0x4840 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
 __do_sys_exit_group kernel/exit.c:1129 [inline]
 __se_sys_exit_group kernel/exit.c:1127 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1127
 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f796a59c799
Code: Unable to access opcode bytes at 0x7f796a59c76f.
RSP: 002b:00007ffecfb386d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f796a59c799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffecfb3873c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000006ad
R13: 00000000000927c0 R14: 00000000000917af R15: 00007ffecfb38790
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	c3                   	ret
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   e:	00 00 00
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	65 8b 05 59 4f 05 12 	mov    %gs:0x12054f59(%rip),%eax        # 0x12054f81
* 28:	49 89 f8             	mov    %rdi,%r8 <-- trapping instruction
  2b:	49 89 f1             	mov    %rsi,%r9
  2e:	49 89 d2             	mov    %rdx,%r10
  31:	65 48 8b 3d 30 4f 05 	mov    %gs:0x12054f30(%rip),%rdi        # 0x12054f69
  38:	12
  39:	a9 00 01 ff 00       	test   $0xff0100,%eax