rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P1055/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=96829, q=84 ncpus=2)
task:kworker/u4:8 state:R running task stack:23264 pid:1055 tgid:1055 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5399 [inline]
__schedule+0xf15/0x5c80 kernel/sched/core.c:6726
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7046
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:rcu_is_watching+0x0/0xb0 kernel/rcu/tree.c:696
Code: 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 c7 c7 60 4d ce 8a e8 f0 5e 1b 09 65 8a 05 55 7f 93 7e 0f b6 c0 c3 0f 1f 44 00 00 0f 1e fa 55 53 65 ff 05 9b 64 93 7e e8 ae 5e 1b 09 48 c7 c3 68
RSP: 0018:ffffc900049bfba0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880378f0708 RCX: ffffffff8a537f1f
RDX: ffff88801f1c1dc0 RSI: ffffffff8a538a24 RDI: 0000000000000005
RBP: 00000000000000e1 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffff88801ea5f6c0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
rcu_read_lock include/linux/rcupdate.h:751 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xc89/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2787
kthread+0x2c1/0x3a0 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
rcu: rcu_preempt kthread starved for 10497 jiffies! g96829 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:27792 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5399 [inline]
__schedule+0xf15/0x5c80 kernel/sched/core.c:6726
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7046
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:654
RIP: 0010:blk_flush_plug include/linux/blkdev.h:994 [inline]
RIP: 0010:sched_submit_work kernel/sched/core.c:6782 [inline]
RIP: 0010:schedule+0x1dd/0x270 kernel/sched/core.c:6815
Code: 50 48 8d bb 58 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8e 00 00 00 48 8b bb 58 12 00 00 <48> 85 ff 74 0a be 01 00 00 00 e8 a4 c5 ba f9 48 c7 c7 c0 a4 07 8d
RSP: 0018:ffffc90000167c00 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8880152d8000 RCX: ffffffff8a8e070f
RDX: 1ffff11002a5b24b RSI: ffffffff8accb7a0 RDI: 0000000000000000
RBP: 1ffff9200002cf85 R08: 0000000000000000 R09: fffffbfff2427fea
R10: ffffffff9213ff57 R11: 0000000000000000 R12: ffff8880152d802c
R13: dffffc0000000000 R14: 1ffffffff19c1e40 R15: 0000000000000001
schedule_timeout+0x136/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1830
kthread+0x2c1/0x3a0 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
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 18316 Comm: syz-executor.0 Not tainted 6.7.0-rc5-next-20231215-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:x64_setup_rt_frame+0x827/0xcb0 arch/x86/kernel/signal_64.c:202
Code: 85 ed 0f 85 ff 01 00 00 e8 f6 3d 5a 00 4c 89 e7 e8 8e a1 0c 00 31 ff 41 89 c5 89 c6 e8 52 39 5a 00 45 85 ed 0f 85 dd 01 00 00 d4 3d 5a 00 49 8d 7c 24 50 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc9000320fd28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000320ff58 RCX: ffffffff812dd1ee
RDX: ffff88808c499dc0 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f7418456b38 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000320fe38
R13: 0000000000000000 R14: ffffc9000320fe40 R15: ffff88808c499dc0
FS: 00007f74184576c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7418455f78 CR3: 000000002777c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
setup_rt_frame arch/x86/kernel/signal.c:222 [inline]
handle_signal arch/x86/kernel/signal.c:266 [inline]
arch_do_signal_or_restart+0x5e2/0x7e0 arch/x86/kernel/signal.c:311
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f741767cba9
Code: 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 01 48
RSP: 002b:00007f74184570c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f741779c050 RCX: 00007f741767cba9
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f74176c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f741779c050 R15: 00007ffd8f2184a8