rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P29 P3252/1:b..l..
rcu: (detected by 1, t=10503 jiffies, g=29577, q=1572 ncpus=2)
task:kworker/R-bat_e state:D stack:24536 pid:3252 tgid:3252 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56f0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule_rtlock+0x30/0x70 kernel/sched/core.c:7538
rtlock_slowlock_locked+0x35c9/0x3c20 kernel/locking/rtmutex.c:1895
rtlock_slowlock kernel/locking/rtmutex.c:1922 [inline]
rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57
spin_lock include/linux/spinlock_rt.h:45 [inline]
tasklet_lock_callback kernel/softirq.c:934 [inline]
tasklet_action_common+0xc5/0x600 kernel/softirq.c:984
handle_softirqs+0x1d4/0x6c0 kernel/softirq.c:669
__do_softirq kernel/softirq.c:703 [inline]
__local_bh_enable_ip+0x16f/0x2b0 kernel/softirq.c:325
local_bh_enable include/linux/bottom_half.h:33 [inline]
spin_unlock_bh include/linux/spinlock_rt.h:122 [inline]
batadv_forw_packet_steal+0x166/0x180 net/batman-adv/send.c:-1
batadv_iv_send_outstanding_bat_ogm_packet+0x639/0x740 net/batman-adv/bat_iv_ogm.c:1928
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
rescuer_thread+0x84a/0x12a0 kernel/workqueue.c:3803
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:ksoftirqd/1 state:R running task stack:21888 pid:29 tgid:29 ppid:2 task_flags:0x4208040 flags:0x00080000
Call Trace:
sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8176
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:300 [inline]
print_other_cpu_stall+0x1115/0x14c0 kernel/rcu/tree_stall.h:709
check_cpu_stall kernel/rcu/tree_stall.h:886 [inline]
rcu_pending kernel/rcu/tree.c:3838 [inline]
rcu_sched_clock_irq+0xa05/0x1090 kernel/rcu/tree.c:2749
update_process_times+0x234/0x2d0 kernel/time/timer.c:2476
tick_sched_handle kernel/time/tick-sched.c:296 [inline]
tick_nohz_handler+0x38f/0x6b0 kernel/time/tick-sched.c:317
__run_hrtimer kernel/time/hrtimer.c:2079 [inline]
__hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:2136
hrtimer_interrupt+0x4c2/0xa80 kernel/time/hrtimer.c:2255
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:252 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x7d/0x130 kernel/kcov.c:365
Code: 8b 05 0f d0 08 12 45 31 c9 41 ba 00 01 00 00 eb 0c 49 ff c1 4c 39 c8 0f 84 a5 00 00 00 4e 8b 5c ce 10 65 48 8b 1d f3 cf 08 12 <41> 89 de 41 81 e6 00 00 00 ff 41 8b a8 fc 0b 00 00 44 21 d5 41 09
RSP: 0018:ffffc90000a3e540 EFLAGS: 00000216
RAX: 0000000000000020 RBX: 8000000000000002 RCX: 0000000000000005
RDX: ffffffff81c9cb65 RSI: ffffffff8f4255e0 RDI: 000000000000000a
RBP: 0000000000000100 R08: ffff88801e6a3e80 R09: 0000000000000014
R10: 0000000000000100 R11: 0000000000000014 R12: dffffc0000000000
R13: 0000000000000a2c R14: 0000000000000100 R15: 000000000009792a
rb_event_length+0x45/0x400 kernel/trace/ring_buffer.c:213
rb_read_data_buffer+0xe2/0x5b0 kernel/trace/ring_buffer.c:1942
check_buffer+0x288/0x860 kernel/trace/ring_buffer.c:4774
__rb_reserve_next+0x549/0xdd0 kernel/trace/ring_buffer.c:4875
rb_reserve_next_event kernel/trace/ring_buffer.c:5012 [inline]
ring_buffer_lock_reserve+0xc0d/0x10c0 kernel/trace/ring_buffer.c:5071
__trace_buffer_lock_reserve kernel/trace/trace.h:1674 [inline]
trace_event_buffer_lock_reserve+0x1d4/0x700 kernel/trace/trace.c:1935
trace_event_buffer_reserve+0x1ef/0x2d0 kernel/trace/trace_events.c:724
do_trace_event_raw_event_lock include/trace/events/lock.h:49 [inline]
trace_event_raw_event_lock+0x127/0x280 include/trace/events/lock.h:49
__do_trace_lock_release include/trace/events/lock.h:68 [inline]
trace_lock_release include/trace/events/lock.h:68 [inline]
lock_release+0x396/0x3c0 kernel/locking/lockdep.c:5954
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2780 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x1c5/0x6d0 mm/slub.c:6923
ieee80211_inform_bss+0xc59/0x1150 net/mac80211/scan.c:172
rdev_inform_bss net/wireless/rdev-ops.h:457 [inline]
cfg80211_inform_single_bss_data+0xd98/0x1bf0 net/wireless/scan.c:2447
cfg80211_inform_bss_data+0x25b/0x3be0 net/wireless/scan.c:3303
cfg80211_inform_bss_frame_data+0x51a/0xae0 net/wireless/scan.c:3399
ieee80211_bss_info_update+0x772/0xa30 net/mac80211/scan.c:236
ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:370
__ieee80211_rx_handle_packet net/mac80211/rx.c:5414 [inline]
ieee80211_rx_list+0x4090/0x4c40 net/mac80211/rx.c:5765
ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5790
ieee80211_rx include/net/mac80211.h:5491 [inline]
ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452
tasklet_action_common+0x31c/0x600 kernel/softirq.c:995
handle_softirqs+0x1d4/0x6c0 kernel/softirq.c:669
run_ksoftirqd+0x53/0x190 kernel/softirq.c:1133
smpboot_thread_fn+0x5f8/0xb30 kernel/smpboot.c:162
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread starved for 463 jiffies! g29577 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:R running task stack:26392 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
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: 8252 Comm: kworker/u8:23 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:389 [inline]
RIP: 0010:smp_call_function_many_cond+0x114e/0x1540 kernel/smp.c:1028
Code: 78 44 8b 2b 44 89 ee 83 e6 01 31 ff e8 7b 73 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 f6 6d 0c 00 eb 35 f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 dc 6d 0c 00
RSP: 0018:ffffc90006857720 EFLAGS: 00000293
RAX: ffffffff81bb6ab4 RBX: ffff8880b8543c48 RCX: ffff8880357a1f40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90006857870 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff21ab2d8 R12: 1ffff110170a8789
R13: dffffc0000000000 R14: 1ffff11006af46a7 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888124715000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdccba81c CR3: 0000000083d76000 CR4: 00000000003526f0
Call Trace:
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2642 [inline]
smp_text_poke_batch_finish+0x5f8/0x1110 arch/x86/kernel/alternative.c:2852
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate+0x1f9/0x290 mm/kfence/core.c:909
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
sched: DL replenish lagged too much