rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P35/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=82501, q=517 ncpus=2)
task:kworker/u8:2 state:R running task stack:23568 pid:35 tgid:35 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x3ba/0x6c0 kernel/locking/lockdep.c:5762
Code: 7e 83 f8 01 0f 85 f5 01 00 00 9c 58 f6 c4 02 0f 85 e0 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90000ab7a98 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: d1e6485b68a8f844 RCX: ffffc90000ab7ae8
RDX: 1ffff110030598da RSI: ffffffff8b2cb260 RDI: ffffffff8b9000c0
RBP: 1ffff92000156f55 R08: 0000000000000000 R09: fffffbfff1fc8d3a
R10: ffffffff8fe469d7 R11: 0000000000000003 R12: 0000000000000003
R13: 0000000000000004 R14: ffff8880182cc6d8 R15: ffff8880182cbc00
rcu_lock_release include/linux/rcupdate.h:339 [inline]
rcu_read_unlock include/linux/rcupdate.h:812 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:771 [inline]
batadv_iv_ogm_schedule_buff+0x761/0x1500 net/batman-adv/bat_iv_ogm.c:825
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8d0 net/batman-adv/bat_iv_ogm.c:1712
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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! g82501 f0x0 RCU_GP_DOING_FQS(6) ->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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:rcu_gp_fqs_loop+0x69b/0xb00 kernel/rcu/tree.c:2033
Code: 89 e0 48 c1 e8 03 80 3c 18 00 0f 85 44 03 00 00 48 8b 05 b8 ae 0b 0c 31 c9 45 31 f6 48 89 05 ac 8e 46 0c 48 8b 15 05 83 46 0c ca fd ff ff ba 01 00 00 00 4c 89 e0 48 c1 e8 03 80 3c 18 00 0f
RSP: 0018:ffffc90000167d18 EFLAGS: 00000246
RAX: 000000010000a77c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b2cb260 RDI: ffff888017ac8a70
RBP: ffff888017ac8000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe469d7 R11: 0000000000000000 R12: ffffffff8d80f200
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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:
CPU: 0 PID: 11517 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00315-gdc772f8237f9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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 8b 74 24 08 48 89 fb 48 83 c7 18 e8 0a 38 80 f6 48 89 df e8 f2 b4 80 f6 e8 9d a3 a9 f6 fb bf 01 00 00 00 12 f7 71 f6 65 8b 05 a3 46 18 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90004097d08 EFLAGS: 00000206
RAX: 000000000145f611 RBX: ffff8880270cca00 RCX: 1ffffffff1fc84e9
RDX: 0000000000000000 RSI: ffffffff8b2caf60 RDI: 0000000000000001
RBP: ffff888065fc8918 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe469d7 R11: 0000000000000000 R12: ffff888065fc8000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888065fc8000
FS: 00007f6f955dc6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f955dbf00 CR3: 000000005ea52000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irq include/linux/spinlock.h:401 [inline]
__set_current_blocked kernel/signal.c:3099 [inline]
set_current_blocked kernel/signal.c:3083 [inline]
signal_delivered kernel/signal.c:2945 [inline]
signal_setup_done+0x2b2/0x570 kernel/signal.c:2957
handle_signal arch/x86/kernel/signal.c:285 [inline]
arch_do_signal_or_restart+0x4bb/0x7e0 arch/x86/kernel/signal.c:312
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+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f948a46f0
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 9a 9a 04 00 e8 25 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007f6f955dbbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f6f949b3f88 RCX: 00007f6f9487cf69
RDX: 00007f6f955dbbc0 RSI: 00007f6f955dbcf0 RDI: 0000000000000021
RBP: 00007f6f949b3f80 R08: 00007f6f955dc6c0 R09: 00007f6f955dc6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f949b3f8c
R13: 000000000000000b R14: 00007ffdc5b094d0 R15: 00007ffdc5b095b8