rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=9324/1/0x4000000000000000 softirq=11018/11019 fqs=4894
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1277507          0            0
rcu: 	cputime:    18189      34290           41   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10265 q=2629 ncpus=2)
CPU: 0 PID: 5873 Comm: syz.1.2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2e/0x60 kernel/kcov.c:216
Code: 48 8b 04 24 65 48 8b 0d f0 24 7e 7e 65 8b 15 f1 24 7e 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 <74> 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b
RSP: 0018:ffffc900000072a8 EFLAGS: 00000246
RAX: ffffffff813aab93 RBX: ffffffff8ecc608c RCX: ffff888024143c00
RDX: 0000000000000100 RSI: ffffffff8cb9e760 RDI: 0000000000000005
RBP: ffffc90000007438 R08: ffff888024143c00 R09: 0000000000000008
R10: 0000000000000009 R11: 0000000000000100 R12: ffffc900000073e8
R13: dffffc0000000000 R14: 0000000000000005 R15: ffffffff8ecc6090
FS:  00007f1c3b3716c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000030117000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 unwind_next_frame+0x853/0x2970 arch/x86/kernel/unwind_orc.c:517
 __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
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519
 dst_alloc+0x105/0x170 net/core/dst.c:89
 ip6_dst_alloc net/ipv6/route.c:344 [inline]
 icmp6_dst_alloc+0x7b/0x400 net/ipv6/route.c:3306
 ndisc_send_skb+0x419/0x14b0 net/ipv6/ndisc.c:493
 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:smp_call_function_single+0x352/0x580 kernel/smp.c:647
Code: 43 0c 48 8d 7b 0e 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 5a 01 00 00 8b 7c 24 04 66 89 7b 0e 48 89 de e8 2e 02 00 00 <41> 89 c4 45 85 ff 74 44 44 89 24 24 0f 1f 44 00 00 4d 89 f7 48 83
RSP: 0018:ffffc900048ffae0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900048ffb20 RCX: 24d664b356dde200
RDX: ffffc9000cd0a000 RSI: 000000000000389b RDI: 000000000000389c
RBP: ffffc900048ffbd0 R08: ffffffff90d9461f R09: 1ffffffff21b28c3
R10: dffffc0000000000 R11: fffffbfff21b28c4 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff9200091ff60 R15: 0000000000000001
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x591/0x8e0 kernel/events/core.c:2948
 __do_sys_perf_event_open kernel/events/core.c:12915 [inline]
 __se_sys_perf_event_open+0x17fa/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: 0033:0x7f1c3a58f749
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:00007f1c3b371038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1c3a7e5fa0 RCX: 00007f1c3a58f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f1c3a613f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c3a7e6038 R14: 00007f1c3a7e5fa0 R15: 00007ffe6e8b3c38
 </TASK>