rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10491 ticks this GP) idle=70a4/1/0x4000000000000000 softirq=32770/32770 fqs=4339
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1396109          0            0
rcu: 	cputime:    17260      35208           65   ==> 52470(ms)
rcu: 	(t=10500 jiffies g=36205 q=1456 ncpus=2)
CPU: 0 PID: 8762 Comm: syz.6.756 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__sanitizer_cov_trace_switch+0x89/0x120 kernel/kcov.c:350
Code: 48 85 c0 0f 84 ae 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 05 c4 1f 7e 7e 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 <4e> 8b 54 ce 10 65 44 8b 1d b2 1f 7e 7e 41 81 e3 00 01 ff 00 74 13
RSP: 0018:ffffc900000073b0 EFLAGS: 00000202
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000003
RDX: ffffffff813aaa82 RSI: ffffffff8cb9e760 RDI: 0000000000000004
RBP: ffffc900000074f8 R08: ffff88802c483c00 R09: 0000000000000004
R10: 0000000000000005 R11: 0000000000000100 R12: ffffc900000074a8
R13: dffffc0000000000 R14: 0000000000000004 R15: ffffffff8ed54344
FS:  00007f5083c6b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000078b22000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x742/0x2970 arch/x86/kernel/unwind_orc.c:515
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 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_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:600 [inline]
 dst_cow_metrics_generic+0x56/0x1c0 net/core/dst.c:195
 dst_metrics_write_ptr include/net/dst.h:133 [inline]
 dst_metric_set include/net/dst.h:194 [inline]
 icmp6_dst_alloc+0x22e/0x400 net/ipv6/route.c:3319
 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: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:ffffc90012d9fa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc90019a78000 RSI: 00000000000020af RDI: 00000000000020b0
RBP: ffffc90012d9fad0 R08: ffffffff90d945ff R09: 1ffffffff21b28bf
R10: dffffc0000000000 R11: fffffbfff21b28c0 R12: 1ffff920025b3f44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920025b3f65
 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: 0033:0x7f5082d8f749
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:00007f5083c6b038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f5082fe5fa0 RCX: 00007f5082d8f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f5082e13f91 R08: 000000000000000a R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5082fe6038 R14: 00007f5082fe5fa0 R15: 00007ffd3da690d8
 </TASK>