rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10520 ticks this GP) idle=cf4c/1/0x4000000000000000 softirq=95101/95102 fqs=5240 rcu: hardirqs softirqs csw/system rcu: number: 1305042 0 0 rcu: cputime: 18205 34274 66 ==> 52500(ms) rcu: (t=10502 jiffies g=134325 q=2331 ncpus=2) CPU: 0 PID: 23620 Comm: syz.3.5806 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:kasan_check_range+0x1c3/0x290 mm/kasan/generic.c:187 Code: 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 6b 49 ff c3 49 ff cc 75 f2 5b 41 5c 41 5d 41 5e 41 5f 5d 45 84 ff 0f 85 91 00 00 00 41 f7 c7 00 ff 00 00 0f 85 89 00 00 RSP: 0018:ffffc90000007448 EFLAGS: 00000256 RAX: ffffc90000007501 RBX: 0000000000000010 RCX: ffffffff813b4e08 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900000075f8 RBP: 0000000000000000 R08: ffffc90000007607 R09: 1ffff92000000ec0 R10: dffffc0000000000 R11: fffff52000000ec1 R12: ffffc900000075a8 R13: dffffc0000000000 R14: ffffc900000075f8 R15: ffffffff8f0e0c54 FS: 00007fe7d22436c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c26a5a1 CR3: 000000007b5fd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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+0xaa/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540 __alloc_skb+0x103/0x2c0 net/core/skbuff.c:643 alloc_skb include/linux/skbuff.h:1316 [inline] ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2a6/0x610 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x542/0x800 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+0xd3/0x190 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] RIP: 0010:smp_call_function_single+0x399/0x5a0 kernel/smp.c:650 Code: c4 45 85 ff 74 44 44 89 24 24 0f 1f 44 00 00 4d 89 f7 48 83 c3 08 49 89 dc 49 c1 ec 03 43 0f b6 04 2c 84 c0 0f 85 45 01 00 00 <44> 8b 33 44 89 f6 83 e6 01 31 ff e8 c7 10 0b 00 41 83 e6 01 75 11 RSP: 0018:ffffc9000cb6fae0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc9000cb6fb28 RCX: 54168f6190a88b00 RDX: ffffc9001afdd000 RSI: 00000000000041e3 RDI: 00000000000041e4 RBP: ffffc9000cb6fbd0 R08: ffffffff911cd5ff R09: 1ffffffff2239abf R10: dffffc0000000000 R11: fffffbfff2239ac0 R12: 1ffff9200196df65 R13: dffffc0000000000 R14: 1ffff9200196df60 R15: 1ffff9200196df60 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x5be/0x920 kernel/events/core.c:2959 __do_sys_perf_event_open kernel/events/core.c:12957 [inline] __se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12609 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fe7d139ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe7d2243028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fe7d1615fa0 RCX: 00007fe7d139ce59 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140 RBP: 00007fe7d1432d6f R08: 0000000000000002 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe7d1616038 R14: 00007fe7d1615fa0 R15: 00007ffcd6c315f8