rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=92ac/1/0x4000000000000000 softirq=56814/56814 fqs=4941
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1364457          0            0
rcu: 	cputime:    18786      33703           38   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=74337 q=2363 ncpus=2)
CPU: 0 PID: 14186 Comm: syz.7.2355 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:strlen+0xa/0x70 lib/string.c:422
Code: d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89 f1 80 e1 07 38 c1 7c e4 4c 89 f7 e8 b2 0b 85 f7 eb da f3 0f 1e fa 41 57 41 56 41 54 <53> 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49
RSP: 0018:ffffc90000007700 EFLAGS: 00000282
RAX: ffffffff8baff680 RBX: ffff88807d7fa9d0 RCX: 1ffff92000000eec
RDX: ffffffff8927bf81 RSI: ffff88807d7fa9b8 RDI: ffffffff8baff680
RBP: ffffc90000007810 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8927bf81 R15: ffffffff8cbfb200
FS:  00007f21ef63a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000061820000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __fortify_strlen include/linux/fortify-string.h:228 [inline]
 trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline]
 perf_trace_lock+0xcd/0x380 include/trace/events/lock.h:50
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x857/0x8b0 kernel/locking/lockdep.c:5765
 __raw_write_unlock_bh include/linux/rwlock_api_smp.h:279 [inline]
 _raw_write_unlock_bh+0x1b/0x40 kernel/locking/spinlock.c:366
 fib6_walker_link net/ipv6/ip6_fib.c:82 [inline]
 fib6_walk+0x141/0x290 net/ipv6/ip6_fib.c:2168
 fib6_clean_tree net/ipv6/ip6_fib.c:2249 [inline]
 __fib6_clean_all+0x235/0x380 net/ipv6/ip6_fib.c:2265
 fib6_clean_all net/ipv6/ip6_fib.c:2276 [inline]
 fib6_run_gc+0x118/0x290 net/ipv6/ip6_fib.c:2339
 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:generic_exec_single+0x476/0x4f0 kernel/smp.c:418
Code: 75 11 e8 cd e6 0a 00 48 85 db 75 16 e8 c3 e6 0a 00 eb 15 e8 bc e6 0a 00 e8 47 cd ec 08 48 85 db 74 ea e8 ad e6 0a 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 66 43 c7 44 2c
RSP: 0018:ffffc9000dd07a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff888028848000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000dd07ad0 R08: ffffffff90d945ff R09: 1ffffffff21b28bf
R10: dffffc0000000000 R11: fffffbfff21b28c0 R12: 1ffff92001ba0f44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92001ba0f65
 smp_call_function_single+0x352/0x580 kernel/smp.c:647
 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: 0033:0x7f21ee78f749
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:00007f21ef63a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f21ee9e5fa0 RCX: 00007f21ee78f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f21ee813f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21ee9e6038 R14: 00007f21ee9e5fa0 R15: 00007ffeca0abf18
 </TASK>