rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P1090/1:b..l P9075/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=52889, q=455 ncpus=2)
task:syz-executor.4 state:R running task stack:25008 pid:9075 tgid:9071 ppid:8567 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
wp_page_copy mm/memory.c:3392 [inline]
do_wp_page+0x1d9f/0x52f0 mm/memory.c:3683
handle_pte_fault+0x119a/0x7130 mm/memory.c:5396
__handle_mm_fault mm/memory.c:5523 [inline]
handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5688
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f6e0c828a00
RSP: 002b:00007f6e0d592530 EFLAGS: 00010202
RAX: 0000000000007400 RBX: 00007f6e0d5925d0 RCX: 0000000000000009
RDX: 0000000000002ff4 RSI: 0000000000000bf5 RDI: 00007f6e0d592670
RBP: 000000000000000a R08: 00007f6e02600000 R09: 0000000000000073
R10: 0000000020000282 R11: 00000000000002e5 R12: 0000000000000801
R13: 00007f6e0c8ebfa0 R14: 0000000000000016 R15: 00007f6e0d592670
task:kworker/u8:7 state:R running task stack:22768 pid:1090 tgid:1090 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:810 [inline]
RIP: 0010:batadv_nc_process_nc_paths+0x26c/0x3a0 net/batman-adv/network-coding.c:699
Code: ff ff ff e8 56 96 44 f6 eb 05 e8 4f 96 44 f6 e8 ea fd 34 00 89 c5 31 ff 89 c6 e8 7f 9a 44 f6 85 ed 74 15 e8 56 c6 2a f6 84 c0 <74> 18 e8 2d 96 44 f6 48 8b 6c 24 08 eb 65 e8 21 96 44 f6 48 8b 6c
RSP: 0018:ffffc90004557ae8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88807b144ca0 RCX: ffff888022191e00
RDX: ffff888022191e00 RSI: ffffffff8c1ff260 RDI: ffffffff8c1ff220
RBP: 0000000000000001 R08: ffffffff8b5190c1 R09: 1ffffffff25f56b0
R10: dffffc0000000000 R11: fffffbfff25f56b1 R12: ffff88807b144ca0
R13: 1ffff1100f628af7 R14: ffff888065902308 R15: ffffffff8b519210
batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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 10557 jiffies! g52889 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:24912 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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: 1 PID: 9070 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00366-g771ed66105de #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 99 c9 0b 00 48 83 c4 08 4c 89 f7 e8 cd 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 20 c7 2a 0a e8 5b f8 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900030ef628 EFLAGS: 00000282
RAX: 17ffd1db301c4e00 RBX: ffff88807e4a3c00 RCX: ffffffff947a3603
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: ffffffff8c1ff280
RBP: ffffc900030ef670 R08: ffffffff8fad4aef R09: 1ffffffff1f5a95d
R10: dffffc0000000000 R11: fffffbfff1f5a95e R12: 1ffff110172a7ea7
R13: dffffc0000000000 R14: ffff8880b953e7c0 R15: ffff8880b953f538
FS: 000055555ccf6480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e02607400 CR3: 000000001e760000 CR4: 0000000000350ef0
Call Trace:
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x17f0/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__schedule_loop kernel/sched/core.c:6824 [inline]
RIP: 0010:schedule+0x138/0x320 kernel/sched/core.c:6837
Code: be 01 00 00 00 e8 98 ed ff f8 48 c7 c7 60 10 1f 8e 4c 89 f6 e8 19 c1 e2 f5 48 89 eb 48 c1 eb 03 eb 0a 48 f7 45 00 08 00 00 00 <74> 2c bf 01 00 00 00 e8 1c cf d5 f5 31 ff e8 85 b4 ff ff bf 01 00
RSP: 0018:ffffc900030efa00 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff1100fc94780 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: 0000000000000001
RBP: ffff88807e4a3c00 R08: ffffffff8fad4aef R09: 1ffffffff1f5a95d
R10: dffffc0000000000 R11: fffffbfff1f5a95e R12: dffffc0000000000
R13: ffffc900030efaf8 R14: ffffffff8b8fc9e0 R15: ffff88807e4a4e78
futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370
__futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f61c967cf69
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:00007ffc2cb884c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000006cad2 RCX: 00007f61c967cf69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f61c97b412c
RBP: 000000000006cb04 R08: 7fffffffffffffff R09: 0000001000000000
R10: 00007ffc2cb885b0 R11: 0000000000000246 R12: 00007ffc2cb885b0
R13: 00007f61c97b412c R14: 0000000000000032 R15: 00007ffc2cb885d0