------------[ cut here ]------------
WARNING: CPU: 0 PID: 5360 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 0 PID: 5360 Comm: syz.1.336 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:ffffc90000007b20 EFLAGS: 00010246
RAX: ffffffff8875bc1b RBX: dffffc0000000000 RCX: ffff88802c38d940
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88807e5f777f R09: 1ffff1100fcbeeef
R10: dffffc0000000000 R11: ffffed100fcbeef0 R12: ffff88807e5f7500
R13: ffff88807e5f7500 R14: ffff88807e5f7720 R15: 1ffff1100fcbeea2
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71ca668e9c CR3: 000000005a9cb000 CR4: 00000000003506f0
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:debug_smp_processor_id+0x0/0x10 lib/smp_processor_id.c:60
Code: 32 8a e8 43 01 00 00 65 c7 05 d8 6a 46 76 00 00 00 00 48 c7 c7 20 e9 32 8a e8 2c 01 00 00 65 ff 0d c1 6a 46 76 5b c3 00 00 cc <48> c7 c7 e0 fd 79 8a 48 c7 c6 20 fe 79 8a eb 00 55 41 57 41 56 53
RSP: 0018:ffffc9000340f2b8 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815d1166
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d89f068
RBP: ffffc9000340f400 R08: ffffffff8d89f06f R09: 1ffffffff1b13e0d
R10: dffffc0000000000 R11: fffffbfff1b13e0e R12: ffffffff8c31eb20
R13: 1ffff92000681e68 R14: 0000000000000000 R15: dffffc0000000000
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
 rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:1123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xc8/0x400 kernel/locking/lockdep.c:5594
 rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 lock_page_memcg+0xa5/0x440 mm/memcontrol.c:2047
 page_remove_rmap+0x2a/0x10f0 mm/rmap.c:1351
 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: 0033:0x7fa5ab79b819
Code: Unable to access opcode bytes at RIP 0x7fa5ab79b7ef.
RSP: 002b:00007fa5a99f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffff2 RBX: 00007fa5aba14fa0 RCX: 00007fa5ab79b819
RDX: 00000000ffffff03 RSI: 0000200000000280 RDI: 0000000000000008
RBP: 00007fa5ab831c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa5aba15038 R14: 00007fa5aba14fa0 R15: 00007ffe2dd3d758
 </TASK>
----------------
Code disassembly (best guess):
   0:	32 8a e8 43 01 00    	xor    0x143e8(%rdx),%cl
   6:	00 65 c7             	add    %ah,-0x39(%rbp)
   9:	05 d8 6a 46 76       	add    $0x76466ad8,%eax
   e:	00 00                	add    %al,(%rax)
  10:	00 00                	add    %al,(%rax)
  12:	48 c7 c7 20 e9 32 8a 	mov    $0xffffffff8a32e920,%rdi
  19:	e8 2c 01 00 00       	call   0x14a
  1e:	65 ff 0d c1 6a 46 76 	decl   %gs:0x76466ac1(%rip)        # 0x76466ae6
  25:	5b                   	pop    %rbx
  26:	c3                   	ret
  27:	00 00                	add    %al,(%rax)
  29:	cc                   	int3
* 2a:	48 c7 c7 e0 fd 79 8a 	mov    $0xffffffff8a79fde0,%rdi <-- trapping instruction
  31:	48 c7 c6 20 fe 79 8a 	mov    $0xffffffff8a79fe20,%rsi
  38:	eb 00                	jmp    0x3a
  3a:	55                   	push   %rbp
  3b:	41 57                	push   %r15
  3d:	41 56                	push   %r14
  3f:	53                   	push   %rbx