rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=b8bc/1/0x4000000000000000 softirq=34770/34771 fqs=3748 rcu: hardirqs softirqs csw/system rcu: number: 1392494 0 0 rcu: cputime: 16595 35884 39 ==> 52480(ms) rcu: (t=10500 jiffies g=46065 q=705 ncpus=2) CPU: 1 PID: 11791 Comm: syz.2.1703 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__lt_find include/linux/rbtree_latch.h:113 [inline] RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline] RIP: 0010:bpf_ksym_find kernel/bpf/core.c:708 [inline] RIP: 0010:is_bpf_text_address+0x1b6/0x2a0 kernel/bpf/core.c:742 Code: 08 00 00 00 49 01 c7 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 57 3e 4a 00 4d 8b 3f 4d 85 ff 74 0a e8 5a d0 f2 ff 58 ff ff ff e8 50 d0 f2 ff 31 db eb 0e e8 47 d0 f2 ff 31 db eb RSP: 0018:ffffc900001f0348 EFLAGS: 00000246 RAX: ffffffff8192c066 RBX: 0000000000000000 RCX: ffff88802c073c00 RDX: 0000000000000100 RSI: 00007f8260d8f749 RDI: ffffffffa0000988 RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff21b28a0 R10: dffffc0000000000 R11: fffffbfff21b28a1 R12: ffffffffa0000988 R13: dffffc0000000000 R14: 00007f8260d8f749 R15: ffff888078a36368 FS: 00007f8261c9e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000078545000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: kernel_text_address+0xa0/0xd0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:lock_is_held_type+0x13e/0x190 kernel/locking/lockdep.c:5830 Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90004daf798 EFLAGS: 00000206 RAX: 22420876de328e00 RBX: ffff88802c073c00 RCX: 22420876de328e00 RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80 RBP: 0000000000000000 R08: ffffc90004daf95f R09: 0000000000000000 R10: ffffc90004daf950 R11: fffff520009b5f2c R12: 0000000000000002 R13: 0000000000000246 R14: ffffffff8cd2ffe0 R15: ffff88802c074730 lock_is_held include/linux/lockdep.h:288 [inline] schedule_debug kernel/sched/core.c:5957 [inline] __schedule+0x22a/0x44d0 kernel/sched/core.c:6590 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866 preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 smp_call_function_single+0x469/0x580 kernel/smp.c:652 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: 0033:0x7f8260d8f749 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:00007f8261c9e038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8260fe5fa0 RCX: 00007f8260d8f749 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140 RBP: 00007f8260e13f91 R08: 000000000000000a R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8260fe6038 R14: 00007f8260fe5fa0 R15: 00007ffcb2799198