rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=e43/1/0x4000000000000000 softirq=69181/69182 fqs=4679 (t=10500 jiffies g=101237 q=1946) NMI backtrace for cpu 0 CPU: 0 PID: 21490 Comm: syz.6.4383 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 nmi_cpu_backtrace+0x397/0x3d0 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+0x6d8/0x1110 kernel/rcu/tree.c:2619 update_process_times+0x193/0x200 kernel/time/timer.c:1818 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:1690 [inline] __hrtimer_run_queues+0x4fe/0xc40 kernel/time/hrtimer.c:1754 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816 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:lock_is_held_type+0x52/0x190 kernel/locking/lockdep.c:-1 Code: 0f 84 03 01 00 00 65 8b 05 4b 88 59 76 85 c0 0f 85 f4 00 00 00 65 48 8b 1d bb 7e 59 76 83 bb ec 0a 00 00 00 0f 85 df 00 00 00 <41> 89 f7 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 2c 24 RSP: 0000:ffffc90000007578 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880292e3b80 RCX: db5914023a347100 RDX: 0000000000000100 RSI: 00000000ffffffff RDI: ffffffff8c11c660 RBP: 00000000ffffffff R08: ffff8880292e3b80 R09: 0000000000000003 R10: 00000000000000d0 R11: 0000000000000100 R12: 0000000000000006 R13: 1ffff92000000f64 R14: 0000000000000000 R15: 0000000000000007 ieee80211_rx_get_bigtk+0x32f/0x490 net/mac80211/rx.c:1896 ieee80211_rx_h_decrypt net/mac80211/rx.c:2026 [inline] ieee80211_rx_handlers+0x2668/0x8470 net/mac80211/rx.c:3937 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3989 [inline] ieee80211_prepare_and_rx_handle+0x1d8e/0x5250 net/mac80211/rx.c:4703 __ieee80211_rx_handle_packet net/mac80211/rx.c:4863 [inline] ieee80211_rx_list+0x1ba1/0x2680 net/mac80211/rx.c:4986 ieee80211_rx_napi+0x15d/0x360 net/mac80211/rx.c:5009 ieee80211_rx include/net/mac80211.h:4573 [inline] ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:237 tasklet_action_common+0x298/0x400 kernel/softirq.c:806 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:exit_to_user_mode_loop+0x40/0x130 kernel/entry/common.c:168 Code: fb eb 1d e8 f2 cd 42 08 65 48 8b 05 4a 3f 9c 7e 4c 8b 30 41 f7 c6 0e 30 02 00 0f 84 ed 00 00 00 e8 c5 b8 17 00 fb 41 f6 c6 08 <74> 05 e8 a9 01 4b 08 41 f7 c6 00 10 00 00 74 08 48 89 df e8 88 d9 RSP: 0000:ffffc9000304ff10 EFLAGS: 00000202 RAX: db5914023a347100 RBX: ffffc9000304ff58 RCX: db5914023a347100 RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: ffffffff8a59a480 RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: 0000000000000000 R13: 0000000000000000 R14: 000000000000000c R15: ffff8880292e3b80 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0033:0x7f741702984f Code: 20 e8 03 00 00 48 8d 3d 36 49 1b 00 48 89 d0 48 f7 64 24 28 31 c0 41 8b 36 48 c1 ea 12 48 01 ca 48 89 d9 48 2b 15 99 6e ea 00 8c f9 fe ff 41 8b 76 2c 85 f6 7e 40 31 db 4c 8d 25 16 49 1b 00 RSP: 002b:00007f74153c1060 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 00007f74171f32a8 RCX: 00007f74171f32a8 RDX: 000000000000fa3a RSI: 0000000000000000 RDI: 00007f74171de167 RBP: 00007f74173a0fa0 R08: 000000000000032a R09: 0039db3c748c6ed6 R10: 000001a1fa893d41 R11: 0000000000026002 R12: 0000000000000000 R13: 00007f74173a1038 R14: 00007f74173a0fa0 R15: 00007fff3f454bf8