rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P1171/2:b..l P16/3:b..l
rcu: (detected by 1, t=10502 jiffies, g=15957, q=955 ncpus=2)
task:ktimers/0 state:D stack:22920 pid:16 tgid:16 ppid:2 task_flags:0x4208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule_rtlock+0x30/0x70 kernel/sched/core.c:7090
rtlock_slowlock_locked+0x3819/0x4010 kernel/locking/rtmutex.c:1868
rtlock_slowlock kernel/locking/rtmutex.c:1895 [inline]
rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
rt_spin_lock+0x158/0x3e0 kernel/locking/spinlock_rt.c:57
spin_lock_bh include/linux/spinlock_rt.h:88 [inline]
cfg80211_inform_single_bss_data+0xba8/0x1ab0 net/wireless/scan.c:2380
cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331
ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226
ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355
__ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline]
ieee80211_rx_list+0x21b1/0x2c50 net/mac80211/rx.c:5451
ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5474
ieee80211_rx include/net/mac80211.h:5214 [inline]
ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453
tasklet_action_common+0x39c/0x6a0 kernel/softirq.c:925
handle_softirqs+0x22f/0x710 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
run_ktimerd+0xcf/0x190 kernel/softirq.c:1138
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:7 state:R running task stack:24712 pid:1171 tgid:1171 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6929
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:141 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline]
RIP: 0010:kasan_check_range+0x79/0x2c0 mm/kasan/generic.c:200
Code: 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df <4d> 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41
RSP: 0000:ffffc900048d6cb0 EFLAGS: 00000a07
RAX: 0000000000000001 RBX: dffffc0000000001 RCX: ffffffff8a13f45d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8880350b30c3
RBP: 0000000000000002 R08: ffff8880350b30c6 R09: 1ffff11006a16618
R10: dffffc0000000000 R11: ffffed1006a16618 R12: ffffffff8a13f45d
R13: ffffc900048d6f60 R14: ffffc900048d7023 R15: 1ffff11006a16618
__asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
cfg80211_update_known_bss+0x9bd/0x1590 net/wireless/scan.c:1957
__cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1989
cfg80211_inform_single_bss_data+0xbc1/0x1ab0 net/wireless/scan.c:2381
cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331
ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0xa4e/0x2af0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1702 [inline]
ieee80211_iface_work+0x85f/0x12d0 net/mac80211/iface.c:1756
cfg80211_wiphy_work+0x2bb/0x470 net/wireless/core.c:435
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g15957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=12267
rcu: rcu_preempt kthread starved for 10502 jiffies! g15957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:I stack:26024 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 63 97 27 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8d207d80 EFLAGS: 000002c2
RAX: 47823e34831b0b00 RBX: ffffffff81953c47 RCX: 47823e34831b0b00
RDX: 0000000000000001 RSI: ffffffff8cd8e758 RDI: ffffffff8b3ddfe0
RBP: ffffffff8d207ea8 R08: ffff8880b88334db R09: 1ffff1101710669b
R10: dffffc0000000000 R11: ffffed101710669c R12: ffffffff8ed64270
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1a60640
FS: 0000000000000000(0000) GS:ffff888126df6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004000 CR3: 00000000281d0000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e7/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
rest_init+0x2de/0x300 init/main.c:757
start_kernel+0x3ae/0x410 init/main.c:1111
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x147