rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7097
rcu: (detected by 0, t=10502 jiffies, g=19977, q=1254 ncpus=2)
task:syz.2.377 state:R running task stack:25176 pid:7097 tgid:7092 ppid:5606 task_flags:0x400140 flags:0x00080000
Call Trace:
sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8184
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
print_other_cpu_stall+0xf7b/0x1310 kernel/rcu/tree_stall.h:680
check_cpu_stall kernel/rcu/tree_stall.h:855 [inline]
rcu_pending kernel/rcu/tree.c:3708 [inline]
rcu_sched_clock_irq+0x93d/0x1050 kernel/rcu/tree.c:2744
update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
tick_sched_handle kernel/time/tick-sched.c:296 [inline]
tick_nohz_handler+0x38f/0x6b0 kernel/time/tick-sched.c:317
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x44a/0x900 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5874
Code: ff ff ff e8 41 7a 90 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 0b b5 d4 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 28 78 ef
RSP: 0018:ffffc9000d1f6c00 EFLAGS: 00000286
RAX: 834183d982722400 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000f188ff2e RSI: ffffffff8d8bebe5 RDI: ffffffff8baa6380
RBP: ffffffff817691ff R08: ffffffff817691ff R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8dfc3080 R12: 0000000000000002
R13: ffffffff8dfc3080 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_dst_trace_buffer+0x108/0x5b0 net/core/dst.c:102
dst_release+0x28/0x1b0 net/core/dst.c:250
vti_xmit net/ipv4/ip_vti.c:228 [inline]
vti_tunnel_xmit+0xffd/0x1a60 net/ipv4/ip_vti.c:307
__netdev_start_xmit include/linux/netdevice.h:5402 [inline]
netdev_start_xmit include/linux/netdevice.h:5411 [inline]
xmit_one net/core/dev.c:3890 [inline]
dev_hard_start_xmit+0x2df/0x870 net/core/dev.c:3906
__dev_queue_xmit+0x1549/0x3890 net/core/dev.c:4873
dev_queue_xmit include/linux/netdevice.h:3442 [inline]
__bpf_tx_skb net/core/filter.c:2156 [inline]
__bpf_redirect_no_mac net/core/filter.c:2186 [inline]
__bpf_redirect+0xaa0/0x1380 net/core/filter.c:2209
____bpf_clone_redirect net/core/filter.c:2497 [inline]
bpf_clone_redirect+0x319/0x4b0 net/core/filter.c:2460
bpf_prog_69c2527fbc57d46b+0x5f/0x68
bpf_dispatcher_nop_func include/linux/bpf.h:1454 [inline]
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
bpf_test_run+0x354/0x830 net/bpf/test_run.c:422
bpf_prog_test_run_skb+0xe35/0x2230 net/bpf/test_run.c:1225
bpf_prog_test_run+0x2cb/0x340 kernel/bpf/syscall.c:4859
__sys_bpf+0xa22/0xd90 kernel/bpf/syscall.c:6436
__do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6534
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a057bce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8a039ed028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8a05a36090 RCX: 00007f8a057bce59
RDX: 0000000000000050 RSI: 0000200000002300 RDI: 000000000000000a
RBP: 00007f8a05852e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8a05a36128 R14: 00007f8a05a36090 R15: 00007fff68601568
rcu: rcu_preempt kthread timer wakeup didn't happen for 10444 jiffies! g19977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x1000
rcu: Possible timer handling issue on cpu=1 timer-softirq=7263
rcu: rcu_preempt kthread starved for 10445 jiffies! g19977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x1000 ->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:D stack:27176 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule_rtlock+0x30/0x70 kernel/sched/core.c:7390
rtlock_slowlock_locked+0x35c5/0x3c20 kernel/locking/rtmutex.c:1895
rtlock_slowlock kernel/locking/rtmutex.c:1922 [inline]
rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57
spin_lock include/linux/spinlock_rt.h:45 [inline]
get_from_partial_node+0x58/0x460 mm/slub.c:3845
get_from_partial mm/slub.c:3975 [inline]
___slab_alloc+0xc2/0x910 mm/slub.c:4487
slab_alloc_node mm/slub.c:4936 [inline]
kmem_cache_alloc_noprof+0xf5/0x650 mm/slub.c:4959
kmem_alloc_batch lib/debugobjects.c:371 [inline]
fill_pool+0x165/0x610 lib/debugobjects.c:420
debug_objects_fill_pool+0x63/0x80 lib/debugobjects.c:780
debug_object_assert_init+0x65/0x300 lib/debugobjects.c:1058
debug_timer_assert_init kernel/time/timer.c:803 [inline]
debug_assert_init kernel/time/timer.c:848 [inline]
__try_to_del_timer_sync kernel/time/timer.c:1457 [inline]
__timer_delete_sync+0x247/0x600 kernel/time/timer.c:1621
schedule_timeout+0x15a/0x2c0 kernel/time/sleep_timeout.c:100
rcu_gp_fqs_loop+0x30c/0x11c0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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 syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 6b 5f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 82 18 00 fb f4 cc cc 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001e7e40 EFLAGS: 00000242
RAX: 0000000000039523 RBX: ffffffff8199365c RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d658ada RDI: ffffffff8baa6380
RBP: ffffc900001e7f10 R08: ffff8880b8733d5b R09: 1ffff110170e67ab
R10: dffffc0000000000 R11: ffffed10170e67ac R12: 0000000000000000
R13: 1ffff11003b52ba0 R14: 1ffff9200003cfd0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125fcd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f77a78b0fd9 CR3: 000000003eb68000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x1cc/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x157