rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P48/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=93017, q=88 ncpus=2)
task:kworker/u4:3    state:R  running task     stack:23328 pid:48    tgid:48    ppid:2      flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1d/0x60 kernel/kcov.c:207
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 c0 bc 03 00 65 8b 05 24 1c 7b 7e a9 00 01 ff 00 48 8b 34 24 <74> 0f f6 c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00
RSP: 0018:ffffc90000b8fbb0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffffffff8a4bbbe4
RDX: ffff8880162b9dc0 RSI: ffffffff8a4bb8a8 RDI: 0000000000000001
RBP: 00000000000002be R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880297b2300
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
 rcu_read_unlock include/linux/rcupdate.h:779 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x8d8/0x10e0 net/batman-adv/network-coding.c:719
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: rcu_preempt kthread starved for 10528 jiffies! g93017 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:28672 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe7/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1830
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 24044 Comm: syz-executor.5 Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__local_bh_enable_ip+0xac/0x120 kernel/softirq.c:388
Code: 1d 91 a5 b3 7e 65 8b 05 8a a5 b3 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 61 af 0a 00 e8 fc 48 3f 00 fb 65 8b 05 6c a5 b3 7e <85> c0 74 4a 5b 5d c3 65 8b 05 72 6f b2 7e 85 c0 75 a2 0f 0b eb 9e
RSP: 0018:ffffc900041ffdf8 EFLAGS: 00000206
RAX: 0000000080000000 RBX: 00000000fffffe01 RCX: 1ffffffff1e337f9
RDX: 0000000000000000 RSI: ffffffff8accb920 RDI: ffffffff8b2eee80
RBP: ffffffff81315da9 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f19f257 R11: 0000000000000000 R12: ffffc900041ffe38
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888072089dc0
FS:  00007fe4aa63e6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4aa63df00 CR3: 0000000045239000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 handle_signal arch/x86/kernel/signal.c:282 [inline]
 arch_do_signal_or_restart+0x5bf/0x7f0 arch/x86/kernel/signal.c:311
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe4a98a4270
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d fa 84 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:00007fe4aa63db38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fe4a999bf80 RCX: 00007fe4a987cae9
RDX: 00007fe4aa63db40 RSI: 00007fe4aa63dc70 RDI: 0000000000000021
RBP: 00007fe4a98c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe4a999bf80 R15: 00007ffeb6c37e08
 </TASK>