sched: DL replenish lagged too much
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (9459 ticks this GP) idle=9544/0/0x3 softirq=80661/80661 fqs=0
rcu: (t=10501 jiffies g=71565 q=187 ncpus=2)
rcu: rcu_preempt kthread starved for 10502 jiffies! g71565 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:28064 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16835 Comm: syz.5.2780 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:bpf_prog_262a74d054ad2993+0x53/0x5f
Code: 00 00 48 b8 00 00 00 00 ff ff ff 80 4c 8b 55 f0 4d 85 d2 74 1b 49 83 ea 01 4d 85 d2 75 0c 49 c7 c2 f0 ff ff ff e8 2d 80 5a e1 <4c> 89 55 f0 eb d2 c9 e9 f1 e7 5a eb cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc90000007ad8 EFLAGS: 00000202
RAX: 80ffffff00000000 RBX: ffffc90005469000 RCX: ffffffff8161a07e
RDX: 1ffff92000a8d209 RSI: ffffc90005469060 RDI: ffffc90000007b48
RBP: ffffc90000007ae8 R08: 0000000000000001 R09: 000000000ee6b27f
R10: 0000000000008e04 R11: ffff888074892ff0 R12: 0000000000000000
R13: 000000c46fd8b86b R14: ffffc90005469040 R15: ffffc90000007b28
FS: 00007fd5dcd4c6c0(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004b8cb000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000001 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
bpf_dispatcher_nop_func include/linux/bpf.h:1376 [inline]
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run2+0x353/0x5c0 kernel/trace/bpf_trace.c:2116
__bpf_trace_timer_expire_entry+0xc6/0x100 include/trace/events/timer.h:92
__do_trace_timer_expire_entry include/trace/events/timer.h:92 [inline]
trace_timer_expire_entry include/trace/events/timer.h:92 [inline]
call_timer_fn+0x34c/0x5a0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x74a/0xae0 kernel/time/timer.c:2373
__run_timer_base kernel/time/timer.c:2385 [inline]
__run_timer_base kernel/time/timer.c:2377 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2394
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2404
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__migrate_enable include/linux/sched.h:2365 [inline]
RIP: 0010:migrate_enable include/linux/sched.h:2429 [inline]
RIP: 0010:bpf_prog_test_run_sk_lookup+0x943/0x12e0 net/bpf/test_run.c:1575
Code: 44 24 6b 4d 8d bc 24 80 04 00 00 88 84 24 54 01 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 74 08 3c 01 0f 8e ec 07 00 00 <41> 0f b7 ac 24 80 04 00 00 31 ff 89 ee e8 7b c5 34 f8 66 85 ed 0f
RSP: 0018:ffffc9000544fa60 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000544fb88 RCX: ffffc90012f6c000
RDX: 0000000000080000 RSI: ffffffff898a18a2 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888074892ff0 R12: ffff8880748924c0
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888074892940
bpf_prog_test_run kernel/bpf/syscall.c:4703 [inline]
__sys_bpf+0x1035/0x4980 kernel/bpf/syscall.c:6182
__do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:6272
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd5dbf8f749
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:00007fd5dcd4c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd5dc1e6090 RCX: 00007fd5dbf8f749
RDX: 0000000000000048 RSI: 0000200000000440 RDI: 000000000000000a
RBP: 00007fd5dc013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd5dc1e6128 R14: 00007fd5dc1e6090 R15: 00007ffe75c62158
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 10/25/2025
RIP: 0010:bpf_prog_262a74d054ad2993+0x53/0x5f
Code: 00 00 48 b8 00 00 00 00 ff ff ff 80 4c 8b 55 f0 4d 85 d2 74 1b 49 83 ea 01 4d 85 d2 75 0c 49 c7 c2 f0 ff ff ff e8 2d 80 5a e1 <4c> 89 55 f0 eb d2 c9 e9 f1 e7 5a eb cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc90000a08ad8 EFLAGS: 00000202
RAX: 80ffffff00000000 RBX: ffffc90005469000 RCX: ffffffff8161a07e
RDX: 1ffff92000a8d209 RSI: ffffc90005469060 RDI: ffffc90000a08b48
RBP: ffffc90000a08ae8 R08: 0000000000000001 R09: 000000000ee6b27f
R10: 0000000000001eb5 R11: ffff88801dab2ff0 R12: 0000000000000000
R13: 000000c460cf4d16 R14: ffffc90005469040 R15: ffffc90000a08b28
FS: 0000000000000000(0000) GS:ffff8881249f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe6dac2f98 CR3: 000000009f2fe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: fffffffffffffffc DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
bpf_dispatcher_nop_func include/linux/bpf.h:1376 [inline]
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run2+0x353/0x5c0 kernel/trace/bpf_trace.c:2116
__bpf_trace_timer_expire_entry+0xc6/0x100 include/trace/events/timer.h:92
__do_trace_timer_expire_entry include/trace/events/timer.h:92 [inline]
trace_timer_expire_entry include/trace/events/timer.h:92 [inline]
call_timer_fn+0x34c/0x5a0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x74a/0xae0 kernel/time/timer.c:2373
__run_timer_base kernel/time/timer.c:2385 [inline]
__run_timer_base kernel/time/timer.c:2377 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2394
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2404
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: c6 5f 02 c3 cc cc cc cc 0f 1f 00 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 13 59 12 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6
RAX: 0000000002cb9799 RBX: 0000000000000001 RCX: ffffffff8b7806d9
RDX: 0000000000000000 RSI: ffffffff8dacdb2d RDI: ffffffff8bf2b300
RBP: ffffed1003b56498 R08: 0000000000000001 R09: ffffed10170a673d
R10: ffff8880b85339eb R11: ffff88801dab2ff0 R12: 0000000000000001
R13: ffff88801dab24c0 R14: ffffffff9088aed0 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x38d/0x510 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148