rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8132/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=31577, q=425 ncpus=2)
task:syz.0.544 state:R running task stack:26296 pid:8132 tgid:8129 ppid:5612 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x106/0x120 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
bpf_test_run+0x2a9/0xa40 net/bpf/test_run.c:425
bpf_prog_test_run_xdp+0x8b4/0x1670 net/bpf/test_run.c:1465
bpf_prog_test_run kernel/bpf/syscall.c:4821 [inline]
__sys_bpf+0x2265/0x4a30 kernel/bpf/syscall.c:6405
__do_sys_bpf kernel/bpf/syscall.c:6506 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6503 [inline]
__x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6503
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa0bc39e559
RSP: 002b:00007fa0bd2e6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fa0bc625fa0 RCX: 00007fa0bc39e559
RDX: 0000000000000050 RSI: 0000200000000280 RDI: 000000000000000a
RBP: 00007fa0bc4358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa0bc626038 R14: 00007fa0bc625fa0 R15: 00007ffc82583828
rcu: rcu_preempt kthread timer wakeup didn't happen for 10495 jiffies! g31577 f0x0 RCU_GP_WAIT_FQS(5) ->state=I
rcu: Possible timer handling issue on cpu=1 timer-softirq=20168
rcu: rcu_preempt kthread starved for 10496 jiffies! g31577 f0x0 RCU_GP_WAIT_FQS(5) ->state=I ->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:28984 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
__schedule_loop kernel/sched/core.c:7361 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7376
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 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: 8128 Comm: syz.3.542 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:465 [inline]
RIP: 0010:lock_release kernel/locking/lockdep.c:5963 [inline]
RIP: 0010:lock_release+0x8c/0x310 kernel/locking/lockdep.c:5950
Code: 00 65 4c 8b 25 ad 18 a6 13 41 8b b4 24 a4 0b 00 00 85 f6 0f 85 23 01 00 00 48 81 3b 40 69 92 95 0f 84 16 01 00 00 9c 41 5e fa <48> c7 c7 9b a1 4d 8e e8 38 03 ed 09 65 ff 05 39 5f a6 13 8b 0d 5f
RSP: 0018:ffffc90000a18e30 EFLAGS: 00000087
RAX: 0000000000000000 RBX: ffff8880b8328518 RCX: 0000000001000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffffff81f7c36b R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802b684b00
R13: ffffffff89dc2b80 R14: 0000000000000087 R15: ffff8880b8328690
FS: 00007f9831e5e6c0(0000) GS:ffff888122a46000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d203c CR3: 00000000354a9000 CR4: 00000000003526f0
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:208 [inline]
_raw_spin_unlock_irqrestore+0x1a/0x80 kernel/locking/spinlock.c:221
__run_hrtimer kernel/time/hrtimer.c:2070 [inline]
__hrtimer_run_queues+0x37b/0x9c0 kernel/time/hrtimer.c:2131
hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2250
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:221
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 b6 1a 10 f6 48 89 df e8 3e 71 10 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 55 54 ff f5 65 48 83 3d b4 33 b6 09 00 74 16 5b
RSP: 0018:ffffc900037f7d80 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffffffff9c9b5438 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8e3e347e RDI: ffffffff8c625580
RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff920006fefb7
R13: 000000000c64259b R14: 000000000c64259b R15: 0000000000000000
class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:594 [inline]
do_settimeofday64+0x326/0x4d0 kernel/time/timekeeping.c:1711
do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:204
__do_sys_clock_settime kernel/time/posix-timers.c:1139 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1123 [inline]
__x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1123
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9830f9e559
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:00007f9831e5e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f9831225fa0 RCX: 00007f9830f9e559
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f98310358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9831226038 R14: 00007f9831225fa0 R15: 00007ffcd691fd58