rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30704/1:b..l
rcu: (detected by 0, t=10506 jiffies, g=156581, q=316 ncpus=2)
task:kworker/u8:5 state:R running task stack:22224 pid:30704 tgid:30704 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
preempt_schedule_notrace+0x62/0xe0 kernel/sched/core.c:7037
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x8e/0xc0 kernel/rcu/tree.c:717
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4e2/0x6f0 kernel/locking/lockdep.c:5862
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x88c/0x1060 net/batman-adv/network-coding.c:719
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10506 jiffies! g156581 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27456 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6603 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x821/0x12f0 drivers/net/wireless/virtual/mac80211_hwsim.c:1828
Code: 24 90 00 00 00 48 c7 84 24 98 00 00 00 00 00 00 00 74 bc e8 c1 b4 d1 fa 49 8d be 10 3e 00 00 48 89 f8 48 c1 e8 03 0f b6 04 18 <84> c0 74 06 0f 8e 80 08 00 00 45 0f b6 ae 10 3e 00 00 31 ff 44 89
RSP: 0018:ffffc90000007af8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff86e83c4d
RDX: ffff8880276b4880 RSI: ffffffff86e83c1f RDI: ffff88807d6a6eb0
RBP: ffff888065d030a0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff888065d03338
R13: 0000000000000000 R14: ffff88807d6a30a0 R15: 0000000000070000
FS: 0000555581e0a500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33c0dff8 CR3: 0000000043628000 CR4: 00000000003526f0
DR0: fffffffffffffffc DR1: 0000000000000006 DR2: 0200000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mac80211_hwsim_tx_frame+0x1eb/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim.c:2215
__mac80211_hwsim_beacon_tx drivers/net/wireless/virtual/mac80211_hwsim.c:2232 [inline]
mac80211_hwsim_beacon_tx+0x592/0xa10 drivers/net/wireless/virtual/mac80211_hwsim.c:2315
__iterate_interfaces+0x2e5/0x640 net/mac80211/util.c:761
ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:797
mac80211_hwsim_beacon+0x105/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2345
__run_hrtimer kernel/time/hrtimer.c:1801 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1865
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1882
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:313
Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff
RSP: 0018:ffffc9000d6ef8f0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b8744a80 RCX: ffffffff81ade25a
RDX: ffff8880276b4880 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170e8951
R13: 0000000000000001 R14: ffff8880b863fe80 R15: ffff8880b8744a88
csd_lock_wait kernel/smp.c:340 [inline]
smp_call_function_many_cond+0x4ea/0x12c0 kernel/smp.c:885
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
flush_tlb_mm_range+0x271/0x4a0 arch/x86/mm/tlb.c:1054
dup_mmap kernel/fork.c:787 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm kernel/fork.c:1752 [inline]
copy_process+0x70fb/0x8c50 kernel/fork.c:2403
kernel_clone+0xfd/0x960 kernel/fork.c:2815
__do_sys_clone+0xcf/0x120 kernel/fork.c:2958
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8507d839d3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff4f09b1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8507d839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000555581e0a7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000034613c R15: 00007fff4f09b390