syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=24a4/1/0x4000000000000000 softirq=60147/60147 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=50705, q=63 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15751 Comm: syz.2.2621 Not tainted 6.13.0-rc7-syzkaller-00043-g619f0b6fad52 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d f4 f0 8e 0c 48 89 de 5b e9 33 fc 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 00 d6 03 00 65 8b 15 80 53 64 7e 81 e2 00 01 ff 00
RSP: 0018:ffffc90000a18c68 EFLAGS: 00000046
RAX: ffffffff89cdfefe RBX: 18266bf0b0000000 RCX: ffff88802ce99e00
RDX: 0000000000010000 RSI: 0000000004000000 RDI: 0000000000000000
RBP: ffff8880363658c8 R08: ffffffff89cdfc73 R09: fffff5200014317c
R10: dffffc0000000000 R11: fffff5200014317c R12: dffffc0000000000
R13: ffff888036365808 R14: ffff888036365800 R15: ffff888079a8d340
FS:  00007f39a550a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003c80 CR3: 0000000058786000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 should_change_schedules net/sched/sch_taprio.c:884 [inline]
 advance_sched+0x80e/0xca0 net/sched/sch_taprio.c:968
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x3a/0x70 kernel/kcov.c:217
Code: 00 65 8b 15 80 53 64 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 <75> 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00
RSP: 0018:ffffc9000425f650 EFLAGS: 00000246
RAX: ffffffff81a38a20 RBX: 0000000000000004 RCX: ffff88802ce99e00
RDX: 0000000000000002 RSI: 000000000000078d RDI: 000000000000078e
RBP: 0000000000000075 R08: 0000000000000005 R09: ffffffff81a17635
R10: 0000000000000020 R11: ffff88802ce99e00 R12: 000000aff06c40e8
R13: 000000000000092c R14: 000000aff06d0ce5 R15: ffff88801d6af928
 rb_read_data_buffer+0x410/0x520 kernel/trace/ring_buffer.c:1749
 check_buffer+0x35e/0x850 kernel/trace/ring_buffer.c:4221
 __rb_reserve_next kernel/trace/ring_buffer.c:4320 [inline]
 rb_reserve_next_event kernel/trace/ring_buffer.c:4452 [inline]
 ring_buffer_lock_reserve+0x12a9/0x21c0 kernel/trace/ring_buffer.c:4511
 __trace_buffer_lock_reserve kernel/trace/trace.c:1020 [inline]
 trace_event_buffer_lock_reserve+0x2ab/0x6a0 kernel/trace/trace.c:2748
 trace_event_buffer_reserve+0x2b7/0x3f0 kernel/trace/trace_events.c:654
 do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 trace_event_raw_event_bpf_trace_printk+0x102/0x260 kernel/trace/bpf_trace.h:11
 trace_bpf_trace_printk+0x186/0x1f0 kernel/trace/bpf_trace.h:11
 ____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
 bpf_trace_printk+0x1bf/0x230 kernel/trace/bpf_trace.c:374
 bpf_prog_0605f9f479290f07+0x38/0x40
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2362 [inline]
 bpf_trace_run2+0x2ee/0x540 kernel/trace/bpf_trace.c:2403
 __bpf_trace_sys_enter+0x38/0x60 include/trace/events/syscalls.h:18
 trace_sys_enter+0xb0/0x120 include/trace/events/syscalls.h:18
 syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
 syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
 do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39a4785d29
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:00007f39a550a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f39a4975fa8 RCX: 00007f39a4785d29
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f39a4975fac
RBP: 00007f39a4975fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f39a4975fac
R13: 0000000000000000 R14: 00007ffc40dbb9a0 R15: 00007ffc40dbba88
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g50705 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=34586
rcu: rcu_preempt kthread starved for 10506 jiffies! g50705 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:25880 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 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
 </TASK>