rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2468/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=61985, q=614 ncpus=2)
task:kworker/u8:7 state:R running task stack:19960 pid:2468 tgid:2468 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319
Code: ca 8b 48 c7 c6 60 db ca 8b e8 8c 87 e1 f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 31 c0 83 3d f7 bf 30 04 00 74 1e 83 3d 46 f2 30 04 00
RSP: 0018:ffffc90009857b50 EFLAGS: 00000282
RAX: fa39602d0b7d8400 RBX: ffff888024625880 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaca20 RDI: ffffffff8c1eb160
RBP: ffff888071911af8 R08: ffffffff92efb507 R09: 1ffffffff25df6a0
R10: dffffc0000000000 R11: fffffbfff25df6a1 R12: ffff88802e4ccca0
R13: 000000000000035f R14: ffff888024625880 R15: dffffc0000000000
rcu_read_lock include/linux/rcupdate.h:782 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xf5/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10525 jiffies! g61985 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:24336 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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 PID: 11539 Comm: syz-executor.2 Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 89 fb e8 23 00 00 00 48 8b 3d 5c a1 3d 0c 48 89 de 5b e9 d3 a0 55 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 80 d3 03 00 65 8b 15 00 d3
RSP: 0018:ffffc90000a08eb0 EFLAGS: 00000093
RAX: 0000000080010002 RBX: 000000952b80fa00 RCX: ffff888029583c00
RDX: 0000000080010002 RSI: 7fffffffffffffff RDI: 000000952b80fa00
RBP: 1ffff110172a591d R08: ffffffff81837870 R09: fffff52000141188
R10: dffffc0000000000 R11: fffff52000141188 R12: 7fffffffffffffff
R13: ffff8880b952c880 R14: dffffc0000000000 R15: ffff8880b952cc68
FS: 00007fcdd4d946c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f153cbac018 CR3: 000000006becc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_update_next_event kernel/time/hrtimer.c:620 [inline]
hrtimer_interrupt+0x4f8/0x990 kernel/time/hrtimer.c:1821
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2a eb f0 f5 48 89 df e8 42 2b f2 f5 e8 1d 88 1b f6 fb bf 01 00 00 00 02 f1 e3 f5 65 8b 05 23 1e 82 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900098d7c70 EFLAGS: 00000282
RAX: c72af7c71ffa0a00 RBX: ffff888017359280 RCX: ffffffff946f3603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc900098d7db0 R08: ffffffff8fa7b4af R09: 1ffffffff1f4f695
R10: dffffc0000000000 R11: fffffbfff1f4f696 R12: 0000000000000021
R13: 1ffff11002e6b2e3 R14: ffff888017359718 R15: ffff888017359280
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x14dd/0x1740 kernel/signal.c:2914
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcdd407dea7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007fcdd4d94178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fcdd41abf88 RCX: 00007fcdd407dea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcdd41abf88
RBP: 00007fcdd41abf80 R08: 00007fcdd4d946c0 R09: 00007fcdd4d946c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcdd41abf8c
R13: 000000000000000b R14: 00007ffd6ea25370 R15: 00007ffd6ea25458