rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (896 ticks this GP) idle=fe8c/1/0x4000000000000000 softirq=257258/257258 fqs=20998 rcu: (detected by 1, t=105004 jiffies, g=227093, q=38102 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10093 Comm: syz-executor.2 Not tainted 6.5.0-rc3-next-20230726 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:native_apic_mem_read+0x3a/0x50 Code: fb 48 8d bb 00 c0 5f ff 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 0c 8b 83 00 c0 5f ff <5b> e9 60 ce 49 03 e8 bb 32 70 00 eb ed 66 0f 1f 84 00 00 00 00 00 RSP: 0018:ffff88806ce096d0 EFLAGS: 00000046 RAX: 00000000000400f6 RBX: 0000000000000300 RCX: 0000000000000100 RDX: 0000000000000000 RSI: ffffffff815a472c RDI: ffffffffff5fc300 RBP: fffffbfff0a5dd94 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff88806ce3a330 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb5a43f2700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4f1797d74c CR3: 0000000036bc8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: native_apic_wait_icr_idle+0x51/0x80 __irq_work_queue_local+0xc1/0x2f0 irq_work_queue_on+0x122/0x130 __rcu_read_unlock+0x3f0/0x4f0 perf_event_output_forward+0x21c/0x3c0 __perf_event_overflow+0x4c2/0x9e0 perf_swevent_event+0x2c6/0x3f0 perf_tp_event+0x2dd/0x1280 perf_trace_run_bpf_submit+0xf3/0x190 perf_trace_preemptirq_template+0x252/0x420 trace_hardirqs_on+0xce/0x100 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0xc8/0x4f0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 00 8b 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88806ce09db8 EFLAGS: 00000206 RAX: 000000000001826c RBX: ffff88806ce3a300 RCX: ffffffff812d4b5f RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8137c5f1 RBP: ffffffff85617700 R08: 0000000000000001 R09: fffffbfff0efe975 R10: ffffffff877f4baf R11: 0000000000000001 R12: 0000000000000001 R13: ffffffff831c1e00 R14: 0000000000000200 R15: dffffc0000000000 ieee80211_iterate_active_interfaces_atomic+0x95/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x59d/0xb60 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x20 Code: bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffff888040bcfcc8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815c79b6 RDX: 0000000000040000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88801f5ec800 R08: 0000000000000005 R09: 00000000fffffff5 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880361fa990 R13: ffffed1003ebd926 R14: 1ffff11008179f9b R15: ffff8880421ad1c0 perf_install_in_context+0x2d6/0x570 __do_sys_perf_event_open+0x1903/0x2ae0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fb5a6e7cb19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb5a43f2188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fb5a6f8ff60 RCX: 00007fb5a6e7cb19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007fb5a6ed6f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5a98debf R14: 00007fb5a43f2300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: fb sti 1: 48 8d bb 00 c0 5f ff lea -0xa04000(%rbx),%rdi 8: 48 89 fa mov %rdi,%rdx b: 48 c1 ea 03 shr $0x3,%rdx f: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 13: 48 89 f8 mov %rdi,%rax 16: 83 e0 07 and $0x7,%eax 19: 83 c0 03 add $0x3,%eax 1c: 38 d0 cmp %dl,%al 1e: 7c 04 jl 0x24 20: 84 d2 test %dl,%dl 22: 75 0c jne 0x30 24: 8b 83 00 c0 5f ff mov -0xa04000(%rbx),%eax * 2a: 5b pop %rbx <-- trapping instruction 2b: e9 60 ce 49 03 jmpq 0x349ce90 30: e8 bb 32 70 00 callq 0x7032f0 35: eb ed jmp 0x24 37: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 3e: 00 00