rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4407 1-.... } 2753 jiffies s: 18817 root: 0x2/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6774 Comm: syz.5.537 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x13/0x80 kernel/kcov.c:320
Code: 11 08 05 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 65 48 8b 0d 64 9c 81 7e 65 8b 15 65 9c 81 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00
RSP: 0018:ffffc900001e0450 EFLAGS: 00000046
RAX: ffffffff81a39a59 RBX: ffff8880176d1e00 RCX: ffff888027830000
RDX: 0000000000010101 RSI: 00000000000001ff RDI: 0000000000000000
RBP: ffff8880176d2278 R08: dffffc0000000000 R09: ffffed1002eda450
R10: ffffed1002eda450 R11: 1ffff11002eda44f R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 00000000000001ff
FS:  00007f786e4166c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30917ff8 CR3: 0000000066934000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 is_sampling_event include/linux/perf_event.h:1198 [inline]
 __perf_event_overflow+0x89/0x610 kernel/events/core.c:9442
 perf_swevent_hrtimer+0x3af/0x500 kernel/events/core.c:10927
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x515/0xd60 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:3984
Code: e9 fb 00 00 00 0f 1f 44 00 00 e8 9f a8 a2 f8 e9 ec 00 00 00 4c 89 ff 4c 89 e6 48 c7 c2 00 92 99 8b e8 68 71 05 00 48 8b 3c 24 <e8> 9f 5a 43 01 4c 8d 63 50 4d 89 e7 49 c1 ef 03 43 0f b6 04 2f 84
RSP: 0018:ffffc900001e0aa0 EFLAGS: 00000246
RAX: 60f5dd57fbc32600 RBX: ffff888055695700 RCX: 60f5dd57fbc32600
RDX: 0000000000000002 RSI: ffffffff8a8c1680 RDI: ffff888055695568
RBP: ffffc900001e0b70 R08: dffffc0000000000 R09: fffffbfff1c3eee6
R10: fffffbfff1c3eee6 R11: 1ffffffff1c3eee5 R12: ffffc900001e0b00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888028a9c000
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_latency_start kernel/sched/core.c:5693 [inline]
RIP: 0010:preempt_count_add+0xb0/0x190 kernel/sched/core.c:5716
Code: 89 df e8 43 6d 0c 00 85 c0 74 09 31 db 31 ff e8 36 6d 0c 00 65 4c 8b 35 ee b9 aa 7e 49 81 c6 d8 14 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 41 3b 79 00 49 89 1e 5b 41 5e 41
RSP: 0018:ffffc90003f17190 EFLAGS: 00000a02
RAX: 1ffff11004f0629b RBX: ffffffff8138651f RCX: ffffffff96be9100
RDX: dffffc0000000000 RSI: ffffffff81d0c72b RDI: ffffffff8138651f
RBP: ffffc90003f172d0 R08: ffffc90003f17350 R09: 0000000000000000
R10: fffff520007e2e5d R11: 1ffff920007e2e5b R12: ffffffff81d0c72b
R13: ffffc90003f173d0 R14: ffff8880278314d8 R15: dffffc0000000000
 unwind_next_frame+0xaf/0x20b0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
 memcg_free_slab_cgroups mm/slab.h:456 [inline]
 unaccount_slab mm/slab.h:645 [inline]
 __free_slab+0xcb/0x300 mm/slub.c:2020
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 __kmem_cache_alloc_node+0x140/0x260 mm/slub.c:3398
 kmalloc_node_trace+0x22/0xe0 mm/slab_common.c:1039
 kmalloc_node include/linux/slab.h:585 [inline]
 kzalloc_node include/linux/slab.h:710 [inline]
 __get_vm_area_node+0x122/0x330 mm/vmalloc.c:2506
 __vmalloc_node_range+0x357/0x1390 mm/vmalloc.c:3203
 __vmalloc_node mm/vmalloc.c:3308 [inline]
 __vmalloc+0x76/0x80 mm/vmalloc.c:3322
 bpf_prog_alloc_no_stats+0x3a/0x3a0 kernel/bpf/core.c:92
 bpf_prog_alloc+0x1c/0x1b0 kernel/bpf/core.c:130
 bpf_prog_load+0x7b6/0x15a0 kernel/bpf/syscall.c:2594
 __sys_bpf+0x520/0x6d0 kernel/bpf/syscall.c:5027
 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f786d58eec9
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:00007f786e416038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f786d7e5fa0 RCX: 00007f786d58eec9
RDX: 0000000000000070 RSI: 0000200000000440 RDI: 0000000000000005
RBP: 00007f786d611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f786d7e6038 R14: 00007f786d7e5fa0 R15: 00007ffdc7357ec8
 </TASK>