------------[ cut here ]------------
WARNING: CPU: 0 PID: 5298 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 0 PID: 5298 Comm: syz.4.337 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:ffffc90000007b20 EFLAGS: 00010246
RAX: ffffffff8875488b RBX: dffffc0000000000 RCX: ffff88801e4dd940
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88807a79027f R09: 1ffff1100f4f204f
R10: dffffc0000000000 R11: ffffed100f4f2050 R12: ffff88807a790000
R13: ffff88807a790000 R14: ffff88807a790220 R15: 1ffff1100f4f2002
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c366f5e CR3: 000000000c08e000 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:kasan_mem_to_shadow include/linux/kasan.h:55 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x3d/0x290 mm/kasan/generic.c:189
Code: 49 89 f8 49 01 f0 0f 82 0e 02 00 00 49 89 f8 49 c1 e8 2f 41 81 f8 ff ff 01 00 0f 82 fa 01 00 00 49 bc 01 00 00 00 00 fc ff df <49> 89 fe 49 c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c
RSP: 0018:ffffc9000304f5f0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815d01b6
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d89dc28
RBP: ffffc9000304f740 R08: 000000000001ffff R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940003231e1 R12: dffffc0000000001
R13: 1ffff92000609ed0 R14: 0000000000000000 R15: dffffc0000000000
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 cpumask_test_cpu include/linux/cpumask.h:344 [inline]
 cpu_online include/linux/cpumask.h:895 [inline]
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xb6/0x400 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
 __do_sys_exit_group kernel/exit.c:1008 [inline]
 __se_sys_exit_group kernel/exit.c:1006 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1006
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdcb08e6799
Code: Unable to access opcode bytes at RIP 0x7fdcb08e676f.
RSP: 002b:00007ffefcf389a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdcb08e6799
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffefcf38a0c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000051
R13: 00000000000927c0 R14: 000000000001b9eb R15: 00007ffefcf38a60
 </TASK>
----------------
Code disassembly (best guess):
   0:	49 89 f8             	mov    %rdi,%r8
   3:	49 01 f0             	add    %rsi,%r8
   6:	0f 82 0e 02 00 00    	jb     0x21a
   c:	49 89 f8             	mov    %rdi,%r8
   f:	49 c1 e8 2f          	shr    $0x2f,%r8
  13:	41 81 f8 ff ff 01 00 	cmp    $0x1ffff,%r8d
  1a:	0f 82 fa 01 00 00    	jb     0x21a
  20:	49 bc 01 00 00 00 00 	movabs $0xdffffc0000000001,%r12
  27:	fc ff df
* 2a:	49 89 fe             	mov    %rdi,%r14 <-- trapping instruction
  2d:	49 c1 ee 03          	shr    $0x3,%r14
  31:	49 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%r10
  38:	fc ff df
  3b:	4f 8d 1c 16          	lea    (%r14,%r10,1),%r11
  3f:	4c                   	rex.WR