rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=411c/1/0x4000000000000000 softirq=18402/18402 fqs=0
rcu: 	(detected by 0, t=10504 jiffies, g=13273, q=1255 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6057 Comm: syz.3.19 Not tainted 6.15.0-rc6-syzkaller-01204-gb8fa067c4a76 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:842 [inline]
RIP: 0010:advance_sched+0xa35/0xc90 net/sched/sch_taprio.c:985
Code: 45 31 c9 53 e8 7c 8d 25 f8 48 83 c4 08 e8 83 8c df 01 89 c5 31 ff 89 c6 e8 58 44 47 f8 85 ed 74 10 e8 9f 67 2e f8 84 c0 74 0e <e8> 06 40 47 f8 eb 56 e8 ff 3f 47 f8 eb 4f e8 58 8c df 01 89 c5 31
RSP: 0018:ffffc90000a08c70 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffffff8978b1a8 RCX: 5d85e18c3bab6500
RDX: ffff88803369bc00 RSI: ffffffff8bc1dbc0 RDI: ffffffff8bc1db80
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff8978b1a8 R12: ffff88805f22b360
R13: ffff88805f22b000 R14: 0000001b18ae2e0a R15: ffff88802e658800
FS:  0000000000000000(0000) GS:ffff8881261b6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000600 CR3: 000000000dd38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/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:1038 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 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:arch_static_branch_jump arch/x86/include/asm/jump_label.h:46 [inline]
RIP: 0010:memcg_kmem_online include/linux/memcontrol.h:1696 [inline]
RIP: 0010:memcg_kmem_uncharge_page include/linux/memcontrol.h:1709 [inline]
RIP: 0010:exit_task_stack_account+0x18c/0x340 kernel/fork.c:545
Code: 74 08 48 89 df e8 74 af 9e 00 4c 8b 33 49 83 c6 20 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 57 af 9e 00 4d 8b 36 <0f> 1f 44 00 00 e8 7a b5 3c 00 4c 89 f7 31 f6 e8 40 6d a6 00 43 80
RSP: 0018:ffffc90003c4fad8 EFLAGS: 00000246
RAX: 1ffff1100520f434 RBX: ffff8880203e9620 RCX: 5d85e18c3bab6500
RDX: 0000000000000000 RSI: ffffffff8d93fb71 RDI: ffff88803369bc00
RBP: ffffc90003c4fc68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff822a6369 R12: 1ffff1100407d2c4
R13: 1ffff110066d3846 R14: ffffea0000cb9ec0 R15: dffffc0000000000
 do_exit+0x1a4c/0x2550 kernel/exit.c:994
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb045f8e969
Code: Unable to access opcode bytes at 0x7fb045f8e93f.
RSP: 002b:00007fb046ed90e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb0461b5fa8 RCX: 00007fb045f8e969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb0461b5fa8
RBP: 00007fb0461b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb0461b5fac
R13: 0000000000000000 R14: 00007ffe9afab100 R15: 00007ffe9afab1e8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g13273 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4535
rcu: rcu_preempt kthread starved for 10504 jiffies! g13273 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:27304 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>