rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P42/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=27309, q=861 ncpus=2)
task:kworker/1:1     state:R  running task     stack:24912 pid:42    ppid:2      flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_acquire+0x1f2/0x410 kernel/locking/lockdep.c:5758
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc90000b2f940 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 160845aadf670900
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc90000b2fa48 R08: dffffc0000000000 R09: 1ffffffff21b28a0
R10: dffffc0000000000 R11: fffffbfff21b28a1 R12: 1ffff92000165f34
R13: ffffffff8cd2ff20 R14: 0000000000000246 R15: dffffc0000000000
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 gc_worker+0x28d/0x14b0 net/netfilter/nf_conntrack_core.c:1502
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: rcu_preempt kthread starved for 1036 jiffies! g27309 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27816 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 8579 Comm: syz.3.607 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ieee80211_beacon_get+0xeb5/0x1600 net/mac80211/tx.c:5452
Code: 49 bc 00 00 00 00 00 fc ff df 42 0f b6 04 20 84 c0 0f 85 c3 05 00 00 45 01 2f 4c 8b 3c 24 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 b1 67 f5 f7 4d 8b 3f 48 8b 44 24 30 42 0f b6 04
RSP: 0018:ffffc900001f0a18 EFLAGS: 00000246
RAX: 1ffff11005831980 RBX: ffffffff89e78876 RCX: ffff888021e09e00
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff88804ee66348
RBP: ffff88804ee66280 R08: ffff88804eeb38e3 R09: 1ffff11009dd671c
R10: dffffc0000000000 R11: ffffed1009dd671d R12: dffffc0000000000
R13: 0000000000000010 R14: ffff88806921a8b0 R15: ffff88802c18cc00
FS:  00007f7e7fe2f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005628c125d660 CR3: 000000002de8d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0xb8/0x560 net/mac80211/tx.c:5569
 ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
 mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:arch_stack_walk+0x12a/0x190 arch/x86/kernel/stacktrace.c:27
Code: ff 44 89 fe e8 f7 76 53 00 45 85 ff 74 46 4c 8d bd 78 ff ff ff 4c 89 ff e8 13 84 08 00 49 89 c4 31 ff 48 89 c6 e8 66 77 53 00 <4d> 85 e4 74 2c 48 89 df 4c 89 e6 41 ff d6 84 c0 74 26 4c 89 ff e8
RSP: 0018:ffffc9000bd67208 EFLAGS: 00000297
RAX: ffffffff81321d9a RBX: ffffc9000bd672c0 RCX: ffff888021e09e00
RDX: 0000000000000002 RSI: ffffffff818da84e RDI: 0000000000000000
RBP: ffffc9000bd67290 R08: ffff888021e09e00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000002 R12: ffffffff818da84e
R13: ffffc9000bd67618 R14: ffffffff81746d20 R15: ffffc9000bd67208
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1811 [inline]
 slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 kmem_cache_free+0xf8/0x280 mm/slub.c:3852
 mmdrop include/linux/sched/mm.h:54 [inline]
 mmdrop_sched include/linux/sched/mm.h:82 [inline]
 mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
 finish_task_switch+0x3e0/0x920 kernel/sched/core.c:5279
 context_switch kernel/sched/core.c:5383 [inline]
 __schedule+0x14da/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:cpus_read_unlock+0x0/0x130 kernel/cpu.c:500
Code: 09 89 c3 e9 27 ff ff ff e8 7d 5f 35 00 e8 68 6a b0 ff 84 db 0f 85 44 ff ff ff e8 6b 5f 35 00 0f b6 c3 5b 5d c3 0f 1f 44 00 00 <f3> 0f 1e fa 53 e8 56 5f 35 00 48 8b 74 24 08 48 c7 c7 10 b2 bc 8c
RSP: 0018:ffffc9000bd67a38 EFLAGS: 00000246
RAX: 028700b46af8fe00 RBX: 0000000000000000 RCX: ffffffff8a700992
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000bd679c0
RBP: ffffc9000bd67b60 R08: ffffc9000bd679c7 R09: 1ffff920017acf38
R10: dffffc0000000000 R11: fffff520017acf39 R12: 0000000000000008
R13: dffffc0000000000 R14: 00000000004dbcb4 R15: 1ffffffff190c22b
 __static_call_update+0x563/0x5c0 kernel/static_call_inline.c:216
 tracepoint_update_call kernel/tracepoint.c:317 [inline]
 tracepoint_remove_func kernel/tracepoint.c:419 [inline]
 tracepoint_probe_unregister+0x736/0x930 kernel/tracepoint.c:551
 trace_event_reg+0x153/0x260 kernel/trace/trace_events.c:-1
 perf_trace_event_unreg+0xb3/0x1b0 kernel/trace/trace_event_perf.c:162
 perf_trace_destroy+0x9e/0x140 kernel/trace/trace_event_perf.c:241
 perf_event_alloc+0x1d6f/0x21b0 kernel/events/core.c:12260
 __do_sys_perf_event_open kernel/events/core.c:12676 [inline]
 __se_sys_perf_event_open+0x5ed/0x1c20 kernel/events/core.c:12567
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e7ef8f749
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:00007f7e7fe2f038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f7e7f1e5fa0 RCX: 00007f7e7ef8f749
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007f7e7f013f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e7f1e6038 R14: 00007f7e7f1e5fa0 R15: 00007ffd7597ac48
 </TASK>