rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (5643 ticks this GP) idle=849/1/0x4000000000000000 softirq=20325/20325 fqs=4902 
	(t=10501 jiffies g=27265 q=1365)
NMI backtrace for cpu 0
CPU: 0 PID: 8463 Comm: syz.7.1008 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22f/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31d/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ea/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4ad/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1108
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:strlen+0x2/0x60 lib/string.c:578
Code: 06 00 48 89 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89 f1 80 e1 07 38 c1 7c e4 4c 89 f7 e8 26 7f b7 fd eb da 0f 1f 40 00 41 57 <41> 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000007770 EFLAGS: 00000286
RAX: ffffffff8a2c2bc0 RBX: ffffffff8c31eab8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c31eaa0 RDI: ffffffff8a2c2bc0
RBP: ffffc90000007880 R08: 0000000000000002 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1b13b86 R12: dffffc0000000000
R13: 1ffff92000000ef8 R14: ffff888029cb6e98 R15: ffffffff8c1eda40
 trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
 perf_trace_lock_acquire+0xc6/0x3e0 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x3d7/0x400 kernel/locking/lockdep.c:5594
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 sta_info_get_bss+0x49/0x2a0 net/mac80211/sta_info.c:198
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4865 [inline]
 ieee80211_rx_list+0x1c51/0x2790 net/mac80211/rx.c:4995
 ieee80211_rx_napi+0x178/0x390 net/mac80211/rx.c:5018
 ieee80211_rx include/net/mac80211.h:4573 [inline]
 ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:237
 tasklet_action_common+0x2ad/0x410 kernel/softirq.c:806
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6799
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 85 ee 8d f7 e8 f0 db ba f7 fb bf 01 00 00 00 <e8> 65 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc900037bf6e0 EFLAGS: 00000282
RAX: 86f3be76a7d75200 RBX: 0000000000000000 RCX: 86f3be76a7d75200
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: 0000000000000001
RBP: ffffc900037bf780 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006f7edc
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:277 [inline]
RIP: 0010:set_root+0x1f8/0x3a0 fs/namei.c:944
Code: 74 24 20 e8 ca 89 f1 ff 43 80 3c 2f 00 74 08 48 89 df e8 6b 87 f1 ff 48 8b 2b 48 83 c5 08 48 89 e8 48 c1 e8 03 42 0f b6 04 28 <84> c0 0f 85 c1 00 00 00 8b 6d 00 89 ee 83 e6 01 31 ff e8 c1 7e ac
RSP: 0018:ffffc900037bf840 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffc900037bfc68 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffff888063399e98 RDI: ffffc900037bfc70
RBP: ffff888073b8ba78 R08: ffffc900037bfc6f R09: 1ffff920006f7f8d
R10: dffffc0000000000 R11: fffff520006f7f8e R12: 0000000000000002
R13: dffffc0000000000 R14: 1ffff1100c6733c9 R15: 1ffff920006f7f8d
 nd_jump_root+0x2a7/0x410 fs/namei.c:963
 path_init+0x382/0x1160 fs/namei.c:2373
 path_openat+0x19a/0x2fa0 fs/namei.c:3745
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 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: 0033:0x7fd33b186fce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fd33941fec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd3394206c0 RCX: 00007fd33b186fce
RDX: 0000000000000002 RSI: 00007fd33941ff90 RDI: ffffffffffffff9c
RBP: 00007fd33b25cbd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd33b440038 R14: 00007fd33b43ffa0 R15: 00007ffebb3052f8
 </TASK>