rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (6 ticks this GP) idle=fd3/1/0x4000000000000002 softirq=36399/36399 fqs=4513 (detected by 1, t=10502 jiffies, g=42077, q=148766) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16173 Comm: syz.2.5626 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_release+0x6b/0x870 kernel/locking/lockdep.c:5631 Code: 60 b3 8a b5 41 48 c7 44 24 68 be 29 a1 8b 48 c7 44 24 70 80 7b 5c 81 4c 8d 7c 24 60 49 c1 ef 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 <4b> 89 04 2f 66 43 c7 44 2f 09 f3 f3 43 c6 44 2f 0b f3 0f 1f 44 00 RSP: 0018:ffffc90000007360 EFLAGS: 00000806 RAX: f2f2f200f1f1f1f1 RBX: 0000000000000001 RCX: ffff888023228000 RDX: 0000000000000100 RSI: ffffffff8198b4a9 RDI: ffffffff8c11c760 RBP: ffffc90000007470 R08: dffffc0000000000 R09: ffffed1004645001 R10: ffffed1004645001 R11: 1ffff11004645000 R12: 00000000ffffffe4 R13: dffffc0000000000 R14: ffffc900000074c0 R15: 1ffff92000000e78 FS: 00007f3e8e2476c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f30948fc358 CR3: 0000000023848000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:773 [inline] __perf_event_output kernel/events/core.c:7813 [inline] perf_event_output_forward+0x222/0x280 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 ed 11 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc90000007ae0 EFLAGS: 00000206 RAX: a6b544fcc2309100 RBX: 1ffff92000000f60 RCX: a6b544fcc2309100 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580 RBP: ffffc90000007bb8 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffffffff8c120c00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x328/0x820 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__mutex_unlock_slowpath+0x295/0x6a0 kernel/locking/mutex.c:862 Code: 60 0b 0b 8a 48 c7 c6 80 0f 0b 8a e8 65 cc ec ff 48 8b 14 24 48 8d 9c 24 80 00 00 00 0f 0b e9 d4 fe ff ff 48 c7 c1 80 4f 0c 96 <80> e1 07 80 c1 03 38 c1 0f 8c 74 fe ff ff 48 c7 c7 80 4f 0c 96 4d RSP: 0018:ffffc900052efca0 EFLAGS: 00000202 RAX: 0000000000000004 RBX: ffffc900052efd20 RCX: ffffffff960c4f80 RDX: 1ffffffff1ad3a19 RSI: 0000000000000008 RDI: ffff888023229448 RBP: ffffc900052efd90 R08: dffffc0000000000 R09: ffffed100464528a R10: ffffed100464528a R11: 1ffff11004645289 R12: 1ffff92000a5df98 R13: 1ffffffff2c189f0 R14: ffff888023229448 R15: dffffc0000000000 __do_sys_perf_event_open kernel/events/core.c:12807 [inline] __se_sys_perf_event_open+0x19a1/0x1b80 kernel/events/core.c:12387 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3e8ebd8749 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:00007f3e8e247038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f3e8ee2efa0 RCX: 00007f3e8ebd8749 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0 RBP: 00007f3e8ec5cf91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3e8ee2f038 R14: 00007f3e8ee2efa0 R15: 00007fff459c45b8