rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2635 jiffies s: 5585 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5171 Comm: syz.0.378 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:178 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2a/0x60 kernel/kcov.c:212
Code: 48 8b 04 24 65 48 8b 0d 54 3c 80 7e 65 8b 15 55 3c 80 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 <74> 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b
RSP: 0018:ffffc900001e0518 EFLAGS: 00000046
RAX: ffffffff81a57830 RBX: 1ffff9200003c0a8 RCX: ffff88805e015a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e05f0 R08: ffffffff8e20b46f R09: 1ffffffff1c4168d
R10: dffffc0000000000 R11: fffffbfff1c4168e R12: 0000000000000000
R13: ffffc900001e0688 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f9c1bb9f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c1bb9eff8 CR3: 0000000074b51000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 class_irqsave_destructor include/linux/irqflags.h:274 [inline]
 perf_swevent_event+0x4b0/0x570 kernel/events/core.c:9651
 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10074
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10042
 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 32 7b 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:ffffc900001e0ac0 EFLAGS: 00000206
RAX: 838b6434c2e47d00 RBX: 1ffff9200003c160 RCX: 838b6434c2e47d00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf68a0
RBP: ffffc900001e0bc0 R08: ffffffff90b0f30f R09: 1ffffffff2161e61
R10: dffffc0000000000 R11: fffffbfff2161e62 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ieee80211_rx_napi+0x23d/0x3c0 net/mac80211/rx.c:5341
 ieee80211_rx include/net/mac80211.h:4849 [inline]
 ieee80211_handle_queued_frames+0x104/0x1a0 net/mac80211/main.c:317
 tasklet_action_common+0x2d0/0x460 kernel/softirq.c:827
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:543 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock+0x135/0x2f0 kernel/locking/spinlock_debug.c:115
Code: df be 04 00 00 00 49 89 d6 e8 f7 38 6e 00 48 8d 7c 24 40 be 04 00 00 00 e8 e8 38 6e 00 8b 44 24 40 b9 01 00 00 00 f0 0f b1 0b <0f> 85 1c 01 00 00 43 c6 44 34 04 f8 65 8b 1d 28 d9 9c 7e 43 0f b6
RSP: 0018:ffffc90005dc79a0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000a18f88 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90005dc79e0
RBP: ffffc90005dc7a58 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000bb8f3c R12: 1ffff92000bb8f38
R13: ffffc90000a18f90 R14: dffffc0000000000 R15: 1ffff920001431f2
 spin_lock include/linux/spinlock.h:351 [inline]
 futex_q_lock+0x1a6/0x240 kernel/futex/core.c:542
 futex_wait_setup+0xe9/0x270 kernel/futex/waitwake.c:607
 futex_wait+0x1b8/0x5c0 kernel/futex/waitwake.c:651
 do_futex+0x310/0x320 kernel/futex/syscalls.c:134
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x381/0x410 kernel/futex/syscalls.c:192
 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: 0033:0x7f9c1ad9e159
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:00007f9c1bb9f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f9c1b025fa8 RCX: 00007f9c1ad9e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9c1b025fa8
RBP: 00007f9c1b025fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c1b026038 R14: 00007ffc462e6860 R15: 00007ffc462e6948
 </TASK>