rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4260/1:b..l
(detected by 1, t=10502 jiffies, g=109093, q=80 ncpus=2)
task:kworker/u4:43 state:R running task stack:23224 pid: 4260 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6806
irqentry_exit+0x53/0x80 kernel/entry/common.c:428
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0010:lock_acquire+0x21e/0x400 kernel/locking/lockdep.c:5670
Code: 23 00 74 08 4c 89 f7 e8 00 f7 73 00 f6 44 24 61 02 0f 85 76 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2c 00 00 00 00 43 c7 44 2c 09 00 00 00 00 43 c7 44 2c 11
RSP: 0018:ffffc9000aaf78c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200155ef24 RCX: ffff8880382d27f0
RDX: dffffc0000000000 RSI: ffffffff8aad88c0 RDI: ffffffff8b0a6740
RBP: ffffc9000aaf7a20 R08: dffffc0000000000 R09: fffffbfff1ff4609
R10: fffffbfff1ff4609 R11: 1ffffffff1ff4608 R12: dffffc0000000000
R13: 1ffff9200155ef20 R14: ffffc9000aaf7920 R15: 0000000000000246
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:280
rcu_read_lock include/linux/rcupdate.h:706 [inline]
inet_twsk_purge+0x11b/0x890 net/ipv4/inet_timewait_sock.c:270
ops_exit_list net/core/net_namespace.c:168 [inline]
cleanup_net+0x80c/0xc50 net/core/net_namespace.c:595
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
rcu: rcu_preempt kthread timer wakeup didn't happen for 10498 jiffies! g109093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=79263
rcu: rcu_preempt kthread starved for 10499 jiffies! g109093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26232 pid: 17 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x309/0x1070 kernel/rcu/tree.c:1657
rcu_gp_kthread+0xa5/0x390 kernel/rcu/tree.c:1854
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_rnp_online_cpus kernel/rcu/tree.c:224 [inline]
RIP: 0010:rcu_rdp_cpu_online kernel/rcu/tree.c:234 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0xbb/0x120 kernel/rcu/tree.c:773
Code: 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 38 b9 6a 00 48 8b 1b 48 83 c3 70 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 1b b9 6a 00 4c 23 3b 75 1a 48 c7 c7 00 60 d2 8c
RSP: 0018:ffffc900000079e0 EFLAGS: 00000046
RAX: 1ffffffff19a4aee RBX: ffffffff8cd25770 RCX: 0000000080010003
RDX: 0000000000000000 RSI: ffffffff8b0a6720 RDI: ffff8880b9a3aae0
RBP: ffffc90000007a88 R08: dffffc0000000000 R09: fffffbfff1c4b5f6
R10: fffffbfff1c4b5f6 R11: 1ffffffff1c4b5f5 R12: dffffc0000000000
R13: ffffffff843ae372 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 000000008d83d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_sched_held+0x74/0x130 kernel/rcu/update.c:123
trace_lock_release+0x7b/0x1a0 include/trace/events/lock.h:69
lock_release+0x81/0x870 kernel/locking/lockdep.c:5677
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
debug_object_activate+0x282/0x6a0 lib/debugobjects.c:686
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer kernel/time/hrtimer.c:1084 [inline]
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0x595/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x16b/0x1f0 kernel/softirq.c:403
Code: 8a e8 d9 ac e6 08 65 66 8b 05 d1 9b b0 7e 66 85 c0 75 57 bf 01 00 00 00 e8 92 7e 0a 00 e8 cd 61 3d 00 fb 65 8b 05 fd 78 af 7e <85> c0 75 05 e8 fc 95 ad ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc900000e7a80 EFLAGS: 00000282
RAX: 0000000080000000 RBX: 1ffff9200001cf54 RCX: ffffffff8169b46a
RDX: dffffc0000000000 RSI: ffffffff8aad7740 RDI: ffffffff8b0a6740
RBP: ffffc900000e7b30 R08: dffffc0000000000 R09: fffffbfff1ff4626
R10: fffffbfff1ff4626 R11: 1ffffffff1ff4625 R12: dffffc0000000000
R13: 1ffff9200001cf58 R14: ffffc900000e7ac0 R15: 0000000000000201
spin_unlock_bh include/linux/spinlock.h:394 [inline]
batadv_nc_purge_paths+0x35f/0x3f0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x2da/0x5b0 net/batman-adv/network-coding.c:720
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30