------------[ cut here ]------------
WARNING: CPU: 1 PID: 4272 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 1 PID: 4272 Comm: syz.2.3 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: ffff88807a581dc0
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88814d0b267f R09: 1ffff11029a164cf
R10: dffffc0000000000 R11: ffffed1029a164d0 R12: ffff88814d0b2400
R13: ffff88814d0b2400 R14: ffff88814d0b2620 R15: 1ffff11029a16482
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb265695dac CR3: 0000000062b0e000 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:stack_trace_consume_entry+0x62/0x270 kernel/stacktrace.c:89
Code: 4d 89 f5 49 c1 ed 03 41 0f b6 44 15 00 84 c0 0f 85 1d 01 00 00 45 3b 0e 73 3a 48 8d 5f 0c 49 89 df 49 c1 ef 03 41 0f b6 04 17 <84> c0 0f 85 42 01 00 00 44 8b 23 45 85 e4 74 21 41 ff cc 41 0f b6
RSP: 0018:ffffc9000335ee18 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffffc9000335ef2c RCX: 0000000080000001
RDX: dffffc0000000000 RSI: ffffffff81a662ab RDI: ffffc9000335ef20
RBP: 1ffff9200066bde6 R08: ffffc9000335ef30 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200066bdd9 R12: ffff88807a581dc0
R13: 1ffff9200066bde5 R14: ffffc9000335ef28 R15: 1ffff9200066bde5
 arch_stack_walk+0x100/0x140 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 save_stack+0x121/0x230 mm/page_owner.c:119
 __reset_page_owner+0x51/0x180 mm/page_owner.c:140
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page_list+0x119/0x820 mm/page_alloc.c:3433
 release_pages+0x186c/0x1be0 mm/swap.c:963
 __pagevec_release+0x6d/0xe0 mm/swap.c:983
 pagevec_release include/linux/pagevec.h:81 [inline]
 shmem_undo_range+0x62b/0x1930 mm/shmem.c:964
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x220/0xa40 mm/shmem.c:1145
 evict+0x4c9/0x8d0 fs/inode.c:647
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5ee/0x930 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x626/0x20c0 kernel/exit.c:883
 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: 0033:0x7fa39bce8819
Code: Unable to access opcode bytes at RIP 0x7fa39bce87ef.
RSP: 002b:00007fa399f42028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: fffffffffffffff2 RBX: 00007fa39bf61fa0 RCX: 00007fa39bce8819
RDX: 00000000ffffff03 RSI: 0000200000000280 RDI: 0000000000000008
RBP: 00007fa39bd7ec91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa39bf62038 R14: 00007fa39bf61fa0 R15: 00007fffd67fd5b8
 </TASK>
----------------
Code disassembly (best guess):
   0:	4d 89 f5             	mov    %r14,%r13
   3:	49 c1 ed 03          	shr    $0x3,%r13
   7:	41 0f b6 44 15 00    	movzbl 0x0(%r13,%rdx,1),%eax
   d:	84 c0                	test   %al,%al
   f:	0f 85 1d 01 00 00    	jne    0x132
  15:	45 3b 0e             	cmp    (%r14),%r9d
  18:	73 3a                	jae    0x54
  1a:	48 8d 5f 0c          	lea    0xc(%rdi),%rbx
  1e:	49 89 df             	mov    %rbx,%r15
  21:	49 c1 ef 03          	shr    $0x3,%r15
  25:	41 0f b6 04 17       	movzbl (%r15,%rdx,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 42 01 00 00    	jne    0x174
  32:	44 8b 23             	mov    (%rbx),%r12d
  35:	45 85 e4             	test   %r12d,%r12d
  38:	74 21                	je     0x5b
  3a:	41 ff cc             	dec    %r12d
  3d:	41                   	rex.B
  3e:	0f                   	.byte 0xf
  3f:	b6                   	.byte 0xb6