rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6989/1:b..l P6734/1:b..l P8733/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=32505, q=207 ncpus=2)
task:dhcpcd-run-hook state:R running task stack:25424 pid:8733 tgid:8733 ppid:8712 task_flags:0x40004c flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6943
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6967
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]
zap_pte_range mm/memory.c:1761 [inline]
zap_pmd_range mm/memory.c:1823 [inline]
zap_pud_range mm/memory.c:1852 [inline]
zap_p4d_range mm/memory.c:1873 [inline]
unmap_page_range+0x3d52/0x48d0 mm/memory.c:1894
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1984
exit_mmap+0x283/0xd40 mm/mmap.c:1284
__mmput+0x115/0x410 kernel/fork.c:1356
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9ad/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f18b2e5aa90
RSP: 002b:00007ffe44cc4878 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000557effb54e04 RCX: 00007f18b2e5aa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000003 R08: 00007ffe44cc4970 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe44cc4b98
R13: 00007ffe44cc4bb0 R14: 0000557eca913169 R15: 00007f18b3057a80
task:kworker/u8:13 state:R running task stack:21104 pid:6734 tgid:6734 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
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_lock_acquire include/linux/rcupdate.h:337 [inline]
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:849 [inline]
RIP: 0010:batadv_nc_process_nc_paths+0xcb/0x3a0 net/batman-adv/network-coding.c:687
Code: 49 c1 e6 03 4c 03 75 00 e8 a2 1c ec f5 48 8d 05 00 00 00 00 48 c7 c7 e0 87 93 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 <48> 89 44 24 28 50 e8 0a ef e0 f5 48 83 c4 08 e8 41 27 34 00 89 c5
RSP: 0000:ffffc9000436fa48 EFLAGS: 00000246
RAX: ffffffff8bb9c8c5 RBX: ffff8880300f4d80 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e9387e0
RBP: ffff88802a6ec080 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff20344ef R12: ffff8880300f4d80
R13: 1ffff1100601eb14 R14: ffff888027a3fae0 R15: ffffffff8bb9cf00
batadv_nc_worker+0x52c/0x610 net/batman-adv/network-coding.c:735
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:syz-executor state:R running task stack:20544 pid:6989 tgid:6989 ppid:6977 task_flags:0x400140 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6943
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6967
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]
copy_pte_range mm/memory.c:1201 [inline]
copy_pmd_range+0x6dc8/0x77a0 mm/memory.c:1262
copy_pud_range mm/memory.c:1299 [inline]
copy_p4d_range mm/memory.c:1323 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1421
dup_mmap kernel/fork.c:748 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm+0x1269/0x2160 kernel/fork.c:1752
copy_process+0x1845/0x3d50 kernel/fork.c:2403
kernel_clone+0x223/0x870 kernel/fork.c:2815
__do_sys_clone kernel/fork.c:2958 [inline]
__se_sys_clone kernel/fork.c:2942 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2942
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: 0033:0x7f1a58d83653
RSP: 002b:00007ffc07308b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1a58d83653
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055556cb8a7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000049d75 R15: 00007ffc07308d20
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g32505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=20298
rcu: rcu_preempt kthread starved for 10502 jiffies! g32505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25968 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:230 [inline]
RIP: 0010:mark_lock+0xa2/0x360 kernel/locking/lockdep.c:4729
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 38 2c 94 be 08 00 00 00 e8 56 40 88 00 48 0f a3 1d 2e 07 91 12 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 00 b7 c3 93 eb 68 48 c7 c0 80
RSP: 0018:ffffc90000a188e8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff819b310a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942c3840
RBP: 0000000000000000 R08: ffffffff942c3847 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: ffff88801d2f0ad4
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88801d2f0b18
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000027000 CR3: 000000006f874000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4637 [inline]
__lock_acquire+0xbc3/0x2100 kernel/locking/lockdep.c:5182
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:873
debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
__run_hrtimer kernel/time/hrtimer.c:1769 [inline]
__hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:flush_smp_call_function_queue+0x23f/0x2a0 kernel/smp.c:620
Code: 00 4d 85 f6 75 16 e8 b0 28 0c 00 eb 15 e8 a9 28 0c 00 e8 64 b4 3a 0a 4d 85 f6 74 ea e8 9a 28 0c 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 66 43 c7 44 27 09 00 00 43 c6 44 27 0b 00
RSP: 0018:ffffc900001a7d20 EFLAGS: 00000293
RAX: ffffffff81b33526 RBX: 0000000000000000 RCX: ffff88801d2f0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001a7dd0 R08: ffffffff81b334fc R09: 1ffffffff20344ee
R10: dffffc0000000000 R11: fffffbfff20344ef R12: 1ffff92000034fa4
R13: 0000000000000046 R14: 0000000000000200 R15: dffffc0000000000
do_idle+0x562/0x5c0 kernel/sched/idle.c:352
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:423
start_secondary+0x102/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147