rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=78ac/1/0x4000000000000000 softirq=11228/11229 fqs=4827
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1340972          0            0
rcu: 	cputime:    18745      33734           39   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10877 q=879 ncpus=2)
CPU: 1 PID: 5952 Comm: syz.3.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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:178 [inline]
RIP: 0010:kasan_check_range+0x4f/0x290 mm/kasan/generic.c:187
Code: 00 49 89 f9 49 c1 e9 2f 41 81 f9 ff ff 01 00 0f 82 46 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 <49> ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d
RSP: 0018:ffffc900001f03b8 EFLAGS: 00000a02
RAX: ffffc900001f0501 RBX: 0000000000000010 RCX: ffffffff813ab988
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900001f0598
RBP: 0000000000000000 R08: ffffc900001f05a8 R09: 000000000001ffff
R10: dffffc0000000000 R11: fffff5200003e0b3 R12: ffffc900001f0548
R13: dffffc0000000000 R14: ffffc900001f0598 R15: 1ffff9200003e0b3
FS:  00007f8cbe7186c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000005cf000 CR3: 0000000078725000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 __asan_memset+0x22/0x40 mm/kasan/shadow.c:84
 unwind_next_frame+0x1648/0x2970 arch/x86/kernel/unwind_orc.c:592
 __unwind_start+0x66a/0x7e0 arch/x86/kernel/unwind_orc.c:760
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 __kfence_alloc+0x29a/0x3a0 mm/kfence/core.c:1101
 kfence_alloc include/linux/kfence.h:129 [inline]
 slab_alloc_node mm/slub.c:3481 [inline]
 kmem_cache_alloc_node+0x2c0/0x330 mm/slub.c:3540
 kmalloc_reserve+0x95/0x240 net/core/skbuff.c:562
 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:653
 alloc_skb include/linux/skbuff.h:1284 [inline]
 ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423
 ndisc_send_rs+0x2a6/0x610 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:debug_lockdep_rcu_enabled+0xf/0x30 kernel/rcu/update.c:319
Code: c6 a0 df aa 8a e8 31 e9 e0 f6 0f 0b eb d1 cc cc cc cc cc cc cc cc cc cc cc cc cc f3 0f 1e fa 31 c0 83 3d 3f 71 db 03 00 74 1d <83> 3d c6 a4 db 03 00 74 14 65 48 8b 0d d0 91 94 75 31 c0 83 b9 dc
RSP: 0018:ffffc90005327cf0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 5f8da51c00e6b600
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc90005327f10 R08: dffffc0000000000 R09: 1ffffffff21b52a0
R10: dffffc0000000000 R11: fffffbfff21b52a1 R12: ffff88807c9bd238
R13: 0000000000000005 R14: ffffffff81f3ba40 R15: ffff88801793e580
 rcu_read_lock_sched include/linux/rcupdate.h:879 [inline]
 fd_install+0x86/0x4e0 fs/file.c:595
 __do_sys_perf_event_open kernel/events/core.c:12936 [inline]
 __se_sys_perf_event_open+0x19b7/0x1c20 kernel/events/core.c:12567
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8cbd78f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8cbe718038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f8cbd9e5fa0 RCX: 00007f8cbd78f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f8cbd813f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8cbd9e6038 R14: 00007f8cbd9e5fa0 R15: 00007ffd18912778
 </TASK>