rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7431/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=32117, q=282 ncpus=2)
task:kworker/u8:33   state:R  running task     stack:25480 pid:7431  tgid:7431  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
 irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find+0x65/0xf0 arch/x86/kernel/unwind_orc.c:103
Code: eb 0c 48 8d 6b 04 49 89 df 49 39 ec 72 4e 4c 89 e2 48 29 ea 48 89 d6 48 c1 ea 3f 48 c1 fe 02 48 01 f2 48 d1 fa 48 8d 5c 95 00 <48> 89 da 48 c1 ea 03 0f b6 34 0a 48 89 da 83 e2 07 83 c2 03 40 38
RSP: 0018:ffffc9000f6c7410 EFLAGS: 00000202
RAX: ffffffff912fbdec RBX: ffffffff90a76ac4 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffffffff90a76a9c
RBP: ffffffff90a76ac0 R08: ffffffff912fbe52 R09: 00000000921ae62f
R10: 0000000000000002 R11: 000000000001288d R12: ffffffff90a76ac8
R13: ffffffff82288d8e R14: ffffffff90a76a9c R15: ffffffff90a76abc
 orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
 unwind_next_frame+0x2ec/0x20b0 arch/x86/kernel/unwind_orc.c:510
 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_save_track+0x14/0x30 mm/kasan/common.c:77
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6670 [inline]
 kfree+0x2f8/0x6e0 mm/slub.c:6878
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1576 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1ab4/0x2fc0 net/mac80211/ibss.c:1602
 ieee80211_iface_process_skb net/mac80211/iface.c:1736 [inline]
 ieee80211_iface_work+0xe28/0x1350 net/mac80211/iface.c:1790
 cfg80211_wiphy_work+0x3fb/0x560 net/wireless/core.c:438
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: rcu_preempt kthread starved for 10538 jiffies! g32117 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:29096 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6960
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:697
Code: 46 e6 77 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 56 e5 77 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 01 ca fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc90000197b28 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffffff818bd7bb RCX: ffffffff81c707ef
RDX: 0000000000000000 RSI: ffffffff8dacdf23 RDI: ffffffff8bf2b400
RBP: ffff8880b853ac80 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9088b4d7 R11: ffff88801decaff0 R12: ffff8880b853ac80
R13: ffff888028530000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53ee762da9 CR3: 00000000776dc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
RIP: 0010:sched_core_balance+0x9d/0xe70 kernel/sched/core.c:6284
Code: a0 96 3c 8e e8 44 23 0e 00 e8 8f 2f ec 09 5b 85 c0 0f 85 f3 09 00 00 48 89 ef e8 ae 3c ff ff e8 f9 30 3b 00 fb 48 63 44 24 50 <48> c7 c3 80 5c b4 93 48 89 44 24 08 48 83 f8 07 0f 87 66 0d 00 00
RSP: 0018:ffffc90000197b58 EFLAGS: 00000202
 do_balance_callbacks kernel/sched/core.c:4901 [inline]
 __balance_callbacks kernel/sched/core.c:4955 [inline]
 finish_lock_switch kernel/sched/core.c:4994 [inline]
 finish_task_switch.isra.0+0x458/0xbd0 kernel/sched/core.c:5112
 context_switch kernel/sched/core.c:5259 [inline]
 __schedule+0x1141/0x6150 kernel/sched/core.c:6863
 schedule_idle+0x5c/0x90 kernel/sched/core.c:6986
 do_idle+0x2b3/0x510 kernel/sched/idle.c:360
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x148
 </TASK>