rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13263/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=50081, q=273 ncpus=2)
task:kworker/u8:1 state:R running task stack:23416 pid:13263 tgid:13263 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7086
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:122 [inline]
RIP: 0010:lock_release+0x114/0x6f0 kernel/locking/lockdep.c:5864
Code: 46 d8 cb 0e 85 ff 0f 84 e5 02 00 00 65 8b 05 cb eb 6b 7e 85 c0 0f 85 d6 02 00 00 65 4c 8b 35 33 39 6d 7e 49 8d be ec 0a 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48
RSP: 0018:ffffc9000be979f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920017d2f40 RCX: ffffffff81969fa9
RDX: 0000000000000000 RSI: ffffffff8bd353c0 RDI: ffff888029ae536c
RBP: ffffffff90627834 R08: 0000000000000000 R09: fffffbfff20c48a2
R10: ffffffff90624517 R11: 0000000000000002 R12: ffffffff8e1bcc80
R13: 0000000000000014 R14: ffff888029ae4880 R15: ffffffff8b2574b0
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
batadv_nc_process_nc_paths.part.0+0x21a/0x3e0 net/batman-adv/network-coding.c:699
batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline]
batadv_nc_worker+0xd66/0x1060 net/batman-adv/network-coding.c:735
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
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 timer wakeup didn't happen for 10514 jiffies! g50081 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=57017
rcu: rcu_preempt kthread starved for 10515 jiffies! g50081 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26128 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13572 Comm: syz.0.1966 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:taprio_dequeue_from_txq+0xea/0x8e0 net/sched/sch_taprio.c:714
Code: 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 a4 06 00 00 41 0f b7 46 36 4d 85 e4 66 89 44 24 1c <0f> 84 d1 02 00 00 e8 9b 33 50 f8 48 8d bb d0 02 00 00 48 b8 00 00
RSP: 0018:ffffc90000a185e8 EFLAGS: 00000286
RAX: 0000000000000002 RBX: ffff88804cac2000 RCX: 00000000ffffffff
RDX: 0000000000000000 RSI: ffffffff8969a2b1 RDI: ffff88814472c036
RBP: 000000000000000a R08: 0000000000000004 R09: 000000000000000a
R10: 0000000000000000 R11: 0000000000000004 R12: ffff88803580c800
R13: ffff8880667f8000 R14: ffff88814472c000 R15: 0000000000000001
FS: 00007f941146b6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000032000 CR3: 0000000030ff0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
taprio_dequeue_tc_priority+0x28d/0x4b0 net/sched/sch_taprio.c:787
taprio_dequeue+0x12c/0x5f0 net/sched/sch_taprio.c:857
dequeue_skb net/sched/sch_generic.c:293 [inline]
qdisc_restart net/sched/sch_generic.c:398 [inline]
__qdisc_run+0x1bd/0x1a10 net/sched/sch_generic.c:416
__dev_xmit_skb net/core/dev.c:4043 [inline]
__dev_queue_xmit+0x2aa4/0x43e0 net/core/dev.c:4550
dev_queue_xmit include/linux/netdevice.h:3311 [inline]
tipc_l2_send_msg+0x309/0x470 net/tipc/bearer.c:516
tipc_bearer_xmit_skb+0x1be/0x430 net/tipc/bearer.c:575
tipc_disc_timeout+0x5b3/0x850 net/tipc/discover.c:338
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1840 [inline]
__run_timers+0x6e8/0x930 kernel/time/timer.c:2414
__run_timer_base kernel/time/timer.c:2426 [inline]
__run_timer_base kernel/time/timer.c:2418 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2435
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2445
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:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5251
Code: a9 0a 00 00 44 8b 0d 23 d3 d9 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 e9 e9 38 00 fb 65 48 8b 1d 10 34 7b 7e <48> 8d bb 08 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900103ff4d8 EFLAGS: 00000206
RAX: 0000000000016233 RBX: ffff88802b534880 RCX: 1ffffffff20c4031
RDX: 0000000000000000 RSI: ffffffff8b6ced20 RDI: ffffffff8bd35440
RBP: ffffc900103ff520 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90624517 R11: 0000000000000000 R12: ffff8880b873fa30
R13: ffff88801d2ec880 R14: ffff88802ad81e00 R15: ffff8880b863ec00
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0xf4b/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
unix_wait_for_peer+0x247/0x280 net/unix/af_unix.c:1526
unix_dgram_sendmsg+0x17dc/0x18c0 net/unix/af_unix.c:2127
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:733 [inline]
____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
__sys_sendmmsg+0x201/0x420 net/socket.c:2716
__do_sys_sendmmsg net/socket.c:2743 [inline]
__se_sys_sendmmsg net/socket.c:2740 [inline]
__x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2740
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: 0033:0x7f941058cde9
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:00007f941146b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f94107a5fa0 RCX: 00007f941058cde9
RDX: 0400000000000041 RSI: 0000400000000000 RDI: 0000000000000006
RBP: 00007f941060e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f94107a5fa0 R15: 00007fff67f17d98