rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2676 jiffies s: 12021 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10635 Comm: syz.1.2940 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:72 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline] RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline] RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:lock_release+0xbb/0x920 kernel/locking/lockdep.c:5673 Code: b6 04 28 84 c0 0f 85 c7 05 00 00 3b 1d fe 9b bb 0c 0f 83 3a 05 00 00 41 89 de c1 eb 06 48 8d 3c dd 68 0f 20 8e be 08 00 00 00 d0 d4 6e 00 4c 0f a3 35 d0 99 bb 0c 73 0d e8 81 ac 07 00 84 c0 RSP: 0018:ffffc90000007220 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88805f173c00 RDX: 0000000000000100 RSI: 0000000000000008 RDI: ffffffff8e200f68 RBP: ffffc90000007330 R08: dffffc0000000000 R09: 1ffffffff215e448 R10: dffffc0000000000 R11: fffffbfff215e449 R12: dffffc0000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000e50 FS: 00007f10379b96c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1036a72780 CR3: 00000000571c4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:355 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:904 [inline] pfn_valid include/linux/mmzone.h:1867 [inline] __virt_addr_valid+0x435/0x540 arch/x86/mm/physaddr.c:65 kasan_addr_to_slab+0x9/0xc0 mm/kasan/common.c:36 __kasan_record_aux_stack+0xf/0xc0 mm/kasan/generic.c:471 irq_work_queue_on+0x10f/0x260 kernel/irq_work.c:140 rcu_read_unlock_special+0x3c9/0x510 kernel/rcu/tree_plugin.h:678 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] __perf_event_output kernel/events/core.c:7741 [inline] perf_event_output_forward+0x271/0x2f0 kernel/events/core.c:7750 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9496 perf_swevent_overflow kernel/events/core.c:9579 [inline] perf_swevent_event+0x315/0x570 kernel/events/core.c:9630 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10064 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 82 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc90000007c40 EFLAGS: 00000206 RAX: 8a051fc626c8bb00 RBX: 1ffff92000000f90 RCX: 8a051fc626c8bb00 RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adee1a0 RBP: ffffc90000007d30 R08: ffffffff90af2357 R09: 1ffffffff215e46a R10: dffffc0000000000 R11: fffffbfff215e46b R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] rebalance_domains+0x86f/0x9d0 kernel/sched/fair.c:11051 handle_softirqs+0x291/0x910 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 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 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:generic_exec_single+0x427/0x4a0 kernel/smp.c:545 Code: 75 11 e8 4c 04 0b 00 48 85 db 75 16 e8 42 04 0b 00 eb 15 e8 3b 04 0b 00 e8 56 bd b3 08 48 85 db 74 ea e8 2c 04 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 44 25 00 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc900040cfa60 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88805f173c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900040cfb30 R08: ffffffff90af2357 R09: 1ffffffff215e46a R10: dffffc0000000000 R11: fffffbfff215e46b R12: dffffc0000000000 R13: 1ffff92000819f50 R14: 0000000000000000 R15: 1ffff92000819f71 smp_call_function_single+0x371/0x5a0 kernel/smp.c:784 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x5cf/0x930 kernel/events/core.c:2941 __do_sys_perf_event_open kernel/events/core.c:12824 [inline] __se_sys_perf_event_open+0x128b/0x1ec0 kernel/events/core.c:12418 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1036b9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f10379b9028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1036e15fa0 RCX: 00007f1036b9ce59 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140 RBP: 00007f1036c32e6f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1036e16038 R14: 00007f1036e15fa0 R15: 00007ffc26a03788