rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24057
rcu: (detected by 0, t=10502 jiffies, g=101773, q=1380 ncpus=2)
task:syz.0.5167 state:R running task stack:26088 pid:24057 tgid:24055 ppid:22413 task_flags:0x400140 flags:0x00080000
Call Trace:
sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:7865
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
print_other_cpu_stall+0xfcc/0x1380 kernel/rcu/tree_stall.h:681
check_cpu_stall kernel/rcu/tree_stall.h:856 [inline]
rcu_pending kernel/rcu/tree.c:3679 [inline]
rcu_sched_clock_irq+0x939/0x1050 kernel/rcu/tree.c:2716
update_process_times+0x23b/0x2f0 kernel/time/timer.c:2474
tick_sched_handle kernel/time/tick-sched.c:298 [inline]
tick_nohz_handler+0x42b/0x770 kernel/time/tick-sched.c:319
__run_hrtimer kernel/time/hrtimer.c:1785 [inline]
__hrtimer_run_queues+0x4e7/0xcc0 kernel/time/hrtimer.c:1849
hrtimer_interrupt+0x42b/0x1010 kernel/time/hrtimer.c:1911
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_lockdep_current_cpu_online+0x25/0x120 kernel/rcu/tree.c:4037
Code: 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 8b 0d 90 88 71 11 b0 01 f7 c1 00 00 f0 00 0f 85 d5 00 00 00 83 3d 0f c6 66 0e 00 <0f> 84 c8 00 00 00 65 ff 05 6e 88 71 11 e8 d9 44 04 0a 89 c3 83 f8
RSP: 0018:ffffc900000079f0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000101
RDX: ffff888026a7db80 RSI: ffffffff8c27d0e0 RDI: ffffffff8c27d0a0
RBP: ffff88809690dc80 R08: ffff888026a7db80 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff8a0c5b10 R12: ffff888052c8fc00
R13: dffffc0000000000 R14: ffff88807b024420 R15: ffff88809690dcd8
rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
__in_dev_get_rcu include/linux/inetdevice.h:239 [inline]
ip_rcv_finish_core+0x51a/0x1c00 net/ipv4/ip_input.c:373
ip_rcv_finish+0x14c/0x2a0 net/ipv4/ip_input.c:451
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6176 [inline]
__netif_receive_skb net/core/dev.c:6289 [inline]
process_backlog+0xaa3/0x1950 net/core/dev.c:6640
__napi_poll+0xae/0x340 net/core/dev.c:7704
napi_poll net/core/dev.c:7767 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7924
handle_softirqs+0x22a/0x870 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
bpf_test_run+0x3a8/0x830 net/bpf/test_run.c:426
bpf_prog_test_run_skb+0xd22/0x1c90 net/bpf/test_run.c:1159
bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4722
__sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6246
__do_sys_bpf kernel/bpf/syscall.c:6341 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6339 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0accb9c819
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:00007f0acd974028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0acce15fa0 RCX: 00007f0accb9c819
RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f0accc32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0acce16038 R14: 00007f0acce15fa0 R15: 00007ffff6727d38
rcu: rcu_preempt kthread starved for 10141 jiffies! g101773 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:27776 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 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 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 0e 6c 02 e9 8e 12 61 f5 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 e3 32 1a 00 fb f4 67 12 61 f5 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 00000246
RAX: 00000000001f0ea9 RBX: ffffffff819a91fa RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8defa72d RDI: ffffffff8c27d100
RBP: ffffc90000197f10 R08: ffff8880b873399b R09: 1ffff110170e6733
R10: dffffc0000000000 R11: ffffed10170e6734 R12: 0000000000000001
R13: 1ffff11003b58000 R14: 0000000000000001 R15: 1ffff11003b58000
FS: 0000000000000000(0000) GS:ffff888125557000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efefea19802 CR3: 0000000052798000 CR4: 0000000000350ef0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:766 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x36a/0x5f0 kernel/sched/idle.c:352
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:451
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x147