------------[ cut here ]------------
WARNING: CPU: 1 PID: 5264 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 1 PID: 5264 Comm: syz.4.389 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Code: 01 e8 d9 d9 03 f9 0f 0b e9 64 fe ff ff e8 cd d9 03 f9 0f 0b e9 99 fe ff ff e8 c1 d9 03 f9 0f 0b e9 c1 fe ff ff e8 b5 d9 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: ffffffff8875488b RBX: dffffc0000000000 RCX: ffff88807f71d940
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88802b9c657f R09: 1ffff11005738caf
R10: dffffc0000000000 R11: ffffed1005738cb0 R12: ffff88802b9c6300
R13: ffff88802b9c6300 R14: ffff88802b9c6520 R15: 1ffff11005738c62
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf3af6d158 CR3: 000000007a271000 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:zap_pte_range mm/memory.c:1380 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1505 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1534 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1555 [inline]
RIP: 0010:unmap_page_range+0xda5/0x2500 mm/memory.c:1576
Code: d8 83 e0 20 75 07 e8 fa 9a cb ff eb 61 48 8b 94 24 d0 00 00 00 48 89 d0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 15 48 8b bc 24 d0 00 00 00 e8 ac a6 10 00 48 8b 94 24 d0 00 00
RSP: 0018:ffffc900033cf560 EFLAGS: 00000246
RAX: 1ffff110044d9333 RBX: 00000000591e2027 RCX: dffffc0000000000
RDX: ffff8880226c9998 RSI: 0000000000000020 RDI: 0000000000000000
RBP: ffffc900033cf6d0 R08: ffff88807f71d947 R09: 1ffff1100fee3b28
R10: dffffc0000000000 R11: ffffed100fee3b29 R12: ffffea0001647898
R13: 000020000080a000 R14: ffffea0001647888 R15: ffffea0001647880
 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: 0033:0x7fa3fd11e629
Code: Unable to access opcode bytes at RIP 0x7fa3fd11e5ff.
RSP: 002b:00007fa3fb378028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffff2 RBX: 00007fa3fd397fa0 RCX: 00007fa3fd11e629
RDX: 00000000ffffff03 RSI: 0000200000000280 RDI: 000000000000000a
RBP: 00007fa3fd1b4b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa3fd398038 R14: 00007fa3fd397fa0 R15: 00007fff3aa55fa8
 </TASK>
----------------
Code disassembly (best guess):
   0:	d8 83 e0 20 75 07    	fadds  0x77520e0(%rbx)
   6:	e8 fa 9a cb ff       	call   0xffcb9b05
   b:	eb 61                	jmp    0x6e
   d:	48 8b 94 24 d0 00 00 	mov    0xd0(%rsp),%rdx
  14:	00
  15:	48 89 d0             	mov    %rdx,%rax
  18:	48 c1 e8 03          	shr    $0x3,%rax
  1c:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  23:	fc ff df
  26:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1)
* 2a:	74 15                	je     0x41 <-- trapping instruction
  2c:	48 8b bc 24 d0 00 00 	mov    0xd0(%rsp),%rdi
  33:	00
  34:	e8 ac a6 10 00       	call   0x10a6e5
  39:	48                   	rex.W
  3a:	8b                   	.byte 0x8b
  3b:	94                   	xchg   %eax,%esp
  3c:	24 d0                	and    $0xd0,%al