rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6092/1:b..l P1104/1:b..l
rcu: 	(detected by 0, t=10504 jiffies, g=18669, q=588 ncpus=2)
task:kworker/u8:6    state:R  running task     stack:24720 pid:1104  tgid:1104  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 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_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5727
Code: c1 05 ea b0 98 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003fffa70 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920007fff50 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8b4cddc0 RDI: ffffffff8bb118a0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2d39ae0
R10: ffffffff969cd707 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8ddba6a0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
 batadv_iv_ogm_schedule_buff+0x5ac/0x14d0 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+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf00 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
 </TASK>
task:syz-executor    state:R  running task     stack:27344 pid:6092  tgid:6092  ppid:5413   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:security_inode_permission+0x2f/0x260 security/security.c:2316
Code: 54 41 89 f4 55 48 89 fd 53 e8 3d 15 4e fd 48 8d 7d 0c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 <83> e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 0a 02 00 00 8b 5d 0c 31
RSP: 0018:ffffc9000934fb38 EFLAGS: 00000a03
RAX: ffff88807027f71c RBX: ffff88807027f710 RCX: ffffffff81feb352
RDX: 0000000000000000 RSI: ffffffff843dc3a3 RDI: ffff88807027f71c
RBP: ffff88807027f710 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000081
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807027f712
 inode_permission fs/namei.c:543 [inline]
 inode_permission+0x17a/0x5f0 fs/namei.c:510
 may_lookup fs/namei.c:1760 [inline]
 link_path_walk.part.0.constprop.0+0x1d7/0xd40 fs/namei.c:2366
 link_path_walk fs/namei.c:2349 [inline]
 path_lookupat+0x93/0x770 fs/namei.c:2579
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2609
 user_path_at+0x3a/0x60 fs/namei.c:3016
 __do_sys_chdir fs/open.c:561 [inline]
 __se_sys_chdir fs/open.c:555 [inline]
 __x64_sys_chdir+0xbf/0x270 fs/open.c:555
 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: 0033:0x7f3d1337cc77
RSP: 002b:00007ffd7aeafe38 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3d1337cc77
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ffd7aeafe80
RBP: 00007ffd7aeafe6c R08: 0000000000000000 R09: 00007f3d1406d6c0
R10: 000055559211c500 R11: 0000000000000246 R12: 0000000000000032
R13: 00000000000379a7 R14: 0000000000036b8b R15: 00007ffd7aeafec0
 </TASK>
rcu: rcu_preempt kthread starved for 10555 jiffies! g18669 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:26656 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111