rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=39c4/1/0x4000000000000000 softirq=215796/215796 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=157677, q=165 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 28948 Comm: syz.9.4571 Not tainted 6.16.0-next-20250808-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_is_watching+0x70/0xb0 kernel/rcu/tree.c:753
Code: c3 98 df a1 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d f9 50 fa 10 74 11 83 e0 04 c1 e8 02 5b <41> 5e 41 5f e9 57 6d d7 09 cc e8 e1 67 8d ff eb e8 48 c7 c7 c0 fb
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 367d2d546a130000
RDX: 0000000000000000 RSI: ffffffff8be346e0 RDI: ffffffff8be346a0
RBP: ffffffff899c0458 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100bff265e R12: 0000000000000002
R13: ffffffff8e139ee0 R14: ffffffff8dbe2d18 R15: dffffc0000000000
FS:  00007f91ca3206c0(0000) GS:ffff888125d15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001a000 CR3: 000000003c4be000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x5f/0x360 kernel/locking/lockdep.c:5831
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 advance_sched+0xa14/0xc90 net/sched/sch_taprio.c:990
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d 34 81 fe 0b 48 89 de 5b e9 43 9b 58 00 cc cc cc 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 08 b0 a0 92 65 8b 15 58 fc e0 10 81 e2 00 01 ff 00
RSP: 0018:ffffc9000b9ffa00 EFLAGS: 00000282
RAX: ffffffff81b445c2 RBX: ffffc9000b9ffa80 RCX: 0000000000000001
RDX: ffffffff99de99e0 RSI: ffffc9000b9ffa80 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000
R10: ffffc9000b9ffac0 R11: fffff5200173ff67 R12: ffffc9000b9ffa80
R13: 0000000000000000 R14: 1ffff9200173ff4c R15: dffffc0000000000
 smp_call_function_single_async+0x22/0x110 kernel/smp.c:719
 rdmsr_safe_on_cpu+0x127/0x230 arch/x86/lib/msr-smp.c:179
 msr_read+0x14d/0x250 arch/x86/kernel/msr.c:66
 vfs_read+0x200/0xa30 fs/read_write.c:570
 ksys_read+0x145/0x250 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91c958ebe9
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:00007f91ca320038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f91c97b5fa0 RCX: 00007f91c958ebe9
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000003
RBP: 00007f91c9611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f91c97b6038 R14: 00007f91c97b5fa0 R15: 00007ffd3c1eb818
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g157677 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=123663
rcu: rcu_preempt kthread starved for 10502 jiffies! g157677 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:26632 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>