rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2635 jiffies s: 233361 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: 21840 Comm: syz.4.4778 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215
Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d f0 66 9d 0c 48 89 de 5b e9 77 21 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 84 fc 7f 7e 65 8b 15 85 fc 7f 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900001e0a18 EFLAGS: 00000046
RAX: ffffffff81aac83a RBX: 1ffff9200003c144 RCX: ffff888027851dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0ac8 R08: ffffffff8e1fd76f R09: 1ffffffff1c3faed
R10: dffffc0000000000 R11: fffffbfff1c3faee R12: dffffc0000000000
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f4acc5196c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000785d4000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ct_irq_exit_irqson+0xaa/0x170 kernel/context_tracking.c:422
 trace_irq_enable_rcuidle+0xd8/0x140 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+0x3d/0xd0 kernel/rcu/tree_plugin.h:425
Code: 65 48 8b 3d 05 35 95 7e 48 8d 9f 3c 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 <4c> 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 75 20
RSP: 0018:ffffc900001e0bc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880278521fc RCX: ffff888027851dc0
RDX: 0000000000000100 RSI: ffffffff8adf0f40 RDI: ffff888027851dc0
RBP: 0000000000000001 R08: ffffffff8e1fd76f R09: 1ffffffff1c3faed
R10: dffffc0000000000 R11: fffffbfff1c3faee R12: 1ffff11004f0a43f
R13: 0000000000000001 R14: ffff888027852200 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826
 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
 handle_softirqs+0x2a1/0x930 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:schedule+0xa6/0x180 kernel/sched/core.c:6640
Code: 4c 89 f7 e8 cc bc 9d f7 49 8b 3e 48 85 ff 74 0a be 01 00 00 00 e8 0a ee be f9 49 89 de 49 c1 ee 03 eb 09 48 f7 03 08 00 00 00 <74> 39 bf 01 00 00 00 e8 de 47 23 f7 31 ff e8 67 be ff ff bf 01 00
RSP: 0018:ffffc9000de3fef0 EFLAGS: 00000246
RAX: 0000000080000001 RBX: ffff888027851dc0 RCX: ffffffff8a35a130
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888027851dc0
RBP: 0000000000000000 R08: ffff888027851dc7 R09: 1ffff11004f0a3b8
R10: dffffc0000000000 R11: ffffed1004f0a3b9 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff11004f0a3b8 R15: dffffc0000000000
 exit_to_user_mode_loop+0x47/0x110 kernel/entry/common.c:165
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:316
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0033:0x7f4acb59c799
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:00007f4acc5190e8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00007f4acb816098 RCX: 00007f4acb59c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4acb81609c
RBP: 00007f4acb816090 R08: 0017b6377215e7d2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4acb816128 R14: 00007ffc7ccb1800 R15: 00007ffc7ccb18e8
 </TASK>