------------[ cut here ]------------
WARNING: CPU: 1 PID: 5204 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 1 PID: 5204 Comm: syz.4.303 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Code: 01 e8 99 78 03 f9 0f 0b e9 64 fe ff ff e8 8d 78 03 f9 0f 0b e9 99 fe ff ff e8 81 78 03 f9 0f 0b e9 c1 fe ff ff e8 75 78 03 f9 <0f> 0b e9 e9 fe ff ff 44 89 f1 80 e1 07 fe c1 38 c1 0f 8c 5b fd ff
RSP: 0018:ffffc90000dd0b20 EFLAGS: 00010246
RAX: ffffffff8875bc1b RBX: dffffc0000000000 RCX: ffff88801bfabb80
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88801b5db87f R09: 1ffff110036bb70f
R10: dffffc0000000000 R11: ffffed10036bb710 R12: ffff88801b5db600
R13: ffff88801b5db600 R14: ffff88801b5db820 R15: 1ffff110036bb6c2
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ce2cdeb95 CR3: 0000000062e2f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __sk_destruct+0x50/0x840 net/core/sock.c:1961
 sock_put include/net/sock.h:1989 [inline]
 sctp_endpoint_destroy_rcu+0x9d/0xe0 net/sctp/endpointola.c:193
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x9d2/0x1670 kernel/rcu/tree.c:2763
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__rcu_read_unlock+0x65/0xd0 kernel/rcu/tree_plugin.h:429
Code: 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 75 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a <5b> 41 5c 41 5d 41 5e 41 5f c3 0f 0b eb f2 e8 58 00 00 00 eb d9 89
RSP: 0018:ffffc900036df500 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffff88801bfabfbc RCX: 0100cf8369963100
RDX: 0000000000000000 RSI: ffffffff8a79fe20 RDI: ffff88801bfabb80
RBP: ffffc900036df6d0 R08: ffffea000173a2c7 R09: 1ffffd40002e7458
R10: dffffc0000000000 R11: fffff940002e7459 R12: 1ffff110037f57f7
R13: 1ffff1100579ba11 R14: ffff88801bfabfc0 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 __unlock_page_memcg+0xea/0x100 mm/memcontrol.c:2093
 zap_pte_range mm/memory.c:1384 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xf96/0x2500 mm/memory.c:1576
 unmap_vmas+0x131/0x250 mm/memory.c:1653
 exit_mmap+0x3b9/0x640 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x588/0x6e0 kernel/exit.c:550
 do_exit+0x5a9/0x20c0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcffa688819
Code: Unable to access opcode bytes at RIP 0x7fcffa6887ef.
RSP: 002b:00007fcff88e2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffff2 RBX: 00007fcffa901fa0 RCX: 00007fcffa688819
RDX: 00000000ffffff03 RSI: 0000200000000280 RDI: 0000000000000008
RBP: 00007fcffa71ec91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcffa902038 R14: 00007fcffa901fa0 R15: 00007ffd0228ff48
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	4c 89 f0             	mov    %r14,%rax
   5:	48 c1 e8 03          	shr    $0x3,%rax
   9:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
   e:	84 c0                	test   %al,%al
  10:	75 5f                	jne    0x71
  12:	41 83 3e 00          	cmpl   $0x0,(%r14)
  16:	75 20                	jne    0x38
  18:	43 0f b6 04 3c       	movzbl (%r12,%r15,1),%eax
  1d:	84 c0                	test   %al,%al
  1f:	75 3a                	jne    0x5b
  21:	8b 03                	mov    (%rbx),%eax
  23:	3d 00 00 00 40       	cmp    $0x40000000,%eax
  28:	73 0a                	jae    0x34
* 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:	c3                   	ret
  34:	0f 0b                	ud2
  36:	eb f2                	jmp    0x2a
  38:	e8 58 00 00 00       	call   0x95
  3d:	eb d9                	jmp    0x18
  3f:	89                   	.byte 0x89