rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=2054/1/0x4000000000000000 softirq=33602/33602 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2546/1:b..l
rcu: (detected by 0, t=10506 jiffies, g=46533, q=246 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9391 Comm: syz.2.1113 Not tainted 6.11.0-rc2-syzkaller-00042-gcf6d429eb656 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:lock_acquire+0x1df/0x550 kernel/locking/lockdep.c:5759
Code: 92 7e 45 31 c9 41 f7 c7 00 02 00 00 41 0f 94 c1 48 8b 7c 24 20 44 89 f6 8b 54 24 1c 48 8b 4c 24 30 4c 8b 44 24 38 6a 00 6a 00 <6a> 00 ff 75 10 ff 74 24 48 e8 c3 04 00 00 48 83 c4 28 48 c7 c7 e0
RSP: 0018:ffffc90000a188d0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffc90000a18940 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff8f04d400
RBP: ffffc90000a18a28 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff202f8be R12: 1ffff92000143124
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS: 00007fb4248016c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001b000 CR3: 00000000635a6000 CR4: 0000000000350ef0
Call Trace:
debug_objects_fill_pool+0x9f/0x9b0 lib/debugobjects.c:615
debug_object_activate+0x135/0x510 lib/debugobjects.c:705
debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
debug_activate kernel/time/hrtimer.c:478 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
__run_hrtimer kernel/time/hrtimer.c:1706 [inline]
__hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:sched_update_worker kernel/sched/core.c:6592 [inline]
RIP: 0010:schedule+0x177/0x320 kernel/sched/core.c:6622
Code: 00 00 00 e8 db ab a4 f5 42 80 3c 23 00 74 d4 48 89 ef e8 ac 70 3c f6 eb ca 4c 8d 75 2c 4d 89 f5 49 c1 ed 03 43 0f b6 44 25 00 <84> c0 0f 85 06 01 00 00 41 8b 06 a9 30 00 00 20 74 7c a9 00 00 00
RSP: 0018:ffffc90003b677c8 EFLAGS: 00000213
RAX: 0000000000000000 RBX: 1ffff11006010780 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: 0000000000000001
RBP: ffff888030083c00 R08: ffffffff9017c5ef R09: 1ffffffff202f8bd
R10: dffffc0000000000 R11: fffffbfff202f8be R12: dffffc0000000000
R13: 1ffff11006010785 R14: ffff888030083c2c R15: ffff888030084e78
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
rdmsr_safe_on_cpu+0x16c/0x310 arch/x86/lib/msr-smp.c:181
msr_read+0x160/0x260 arch/x86/kernel/msr.c:66
vfs_read+0x206/0xbc0 fs/read_write.c:474
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7fb4239779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb424801038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fb423b05f80 RCX: 00007fb4239779f9
RDX: 0000000000018ff8 RSI: 0000000020019680 RDI: 0000000000000005
RBP: 00007fb4239e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb423b05f80 R15: 00007ffda86d0bb8
task:kworker/u8:9 state:R running task stack:18736 pid:2546 tgid:2546 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xc1/0xa30 kernel/locking/lockdep.c:5770
Code: 48 89 d8 48 c1 e8 06 48 8d 3c c5 e8 c5 17 90 be 08 00 00 00 e8 a0 d4 8a 00 48 0f a3 1d 20 e3 a7 0e 73 16 e8 a1 ce 09 00 84 c0 <75> 0d 80 3d 7b b0 91 0e 00 0f 84 fc 05 00 00 48 c7 c0 4c f6 17 90
RSP: 0018:ffffc900093c7a20 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816fe2c0
RDX: 0000000000000000 RSI: ffffffff8c605f20 RDI: ffffffff8c605ee0
RBP: ffffc900093c7b48 R08: ffffffff9017c5ef R09: 1ffffffff202f8bd
R10: dffffc0000000000 R11: fffffbfff202f8be R12: 1ffff92001278f50
R13: ffffffff8b8024ab R14: ffff888079cae340 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:336 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x28b/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
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 10506 jiffies! g46533 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
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: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc2-syzkaller-00042-gcf6d429eb656 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d7 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d e5 11 b4 00 f3 0f 1e fa fb f4 e9 24 40 3a 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e607ca8 EFLAGS: 00000246
RAX: ffffffff8e694680 RBX: ffff888015950064 RCX: 000000000021e661
RDX: 0000000000000001 RSI: ffff888015950000 RDI: ffff888015950064
RBP: 000000000003a6b8 R08: ffff8880b9237c7b R09: 1ffff11017246f8f
R10: dffffc0000000000 R11: ffffffff8bb5fc90 R12: ffff88801afc5000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8f0dcb00
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c311f08 CR3: 00000000635a6000 CR4: 0000000000350ef0
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x114/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47a/0x500 init/main.c:1103
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147