rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=94f/1/0x4000000000000000 softirq=6041/6041 fqs=0 
	(detected by 1, t=10506 jiffies, g=6373, q=6075)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4597 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:104 [inline]
RIP: 0010:do_raw_spin_unlock+0xcd/0x230 kernel/locking/spinlock_debug.c:140
Code: 84 c0 0f 85 3e 01 00 00 41 8b 07 65 8b 0d 53 c4 a4 7e 39 c8 0f 85 d0 00 00 00 43 80 7c 25 00 00 74 08 4c 89 f7 e8 93 e3 5e 00 <49> c7 06 ff ff ff ff 42 0f b6 44 25 00 84 c0 0f 85 25 01 00 00 41
RSP: 0018:ffffc90000007c48 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b902a240 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b902a240
RBP: 1ffff11017205449 R08: dffffc0000000000 R09: ffffed1017205449
R10: ffffed1017205449 R11: 1ffff11017205448 R12: dffffc0000000000
R13: 1ffff1101720544a R14: ffff8880b902a250 R15: ffff8880b902a248
FS:  00007f7e56c0c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000000778c3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:159 [inline]
 _raw_spin_unlock_irqrestore+0x75/0x100 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1681 [inline]
 __hrtimer_run_queues+0x441/0xc40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 de 0d cb f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f6 95 9e f7 65 8b 05 87 93 4f 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900033ff920 EFLAGS: 00000206
RAX: 15fc97c2ee6dee00 RBX: 0000000000000a06 RCX: 15fc97c2ee6dee00
RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: 0000000000000001
RBP: ffffc900033ff9b0 R08: dffffc0000000000 R09: fffffbfff1ff7c19
R10: fffffbfff1ff7c19 R11: 1ffffffff1ff7c18 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880b902a240 R15: 1ffff9200067ff24
 clock_was_set+0x642/0x840 kernel/time/hrtimer.c:955
 timekeeping_inject_offset+0x578/0x620 kernel/time/timekeeping.c:1378
 do_adjtimex+0x418/0x9b0 kernel/time/timekeeping.c:2427
 do_clock_adjtime kernel/time/posix-timers.c:1155 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1167 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1158 [inline]
 __x64_sys_clock_adjtime+0x1f0/0x2a0 kernel/time/posix-timers.c:1158
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7e5788aae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7e56c0c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f7e579a9f80 RCX: 00007f7e5788aae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f7e578d647a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7e579a9f80 R15: 00007ffdab281d38
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g6373 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=4420
rcu: rcu_preempt kthread starved for 10506 jiffies! g6373 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28224 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4597 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:advance_sched+0x98/0x940 net/sched/sch_taprio.c:717
Code: c6 e8 2c 5d 6e f9 85 db 0f 84 10 04 00 00 e8 bf 59 6e f9 eb 05 e8 b8 59 6e f9 48 8d 5d e8 48 89 d8 48 c1 e8 03 48 89 44 24 58 <42> 80 3c 28 00 74 08 48 89 df e8 b9 c1 b2 f9 48 89 5c 24 60 4c 8b
RSP: 0018:ffffc90000007c80 EFLAGS: 00000806
RAX: 1ffff11003332665 RBX: ffff888019993328 RCX: ffff8880790b5940
RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888019993340 R08: 0000000000000004 R09: 0000000000000003
R10: fffff52000000f80 R11: 1ffff92000000f80 R12: ffff8880199932e8
R13: dffffc0000000000 R14: ffff888019993000 R15: 1ffff1100f216c83
FS:  00007f7e56c0c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000000778c3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 de 0d cb f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f6 95 9e f7 65 8b 05 87 93 4f 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900033ff920 EFLAGS: 00000206
RAX: 15fc97c2ee6dee00 RBX: 0000000000000a06 RCX: 15fc97c2ee6dee00
RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: 0000000000000001
RBP: ffffc900033ff9b0 R08: dffffc0000000000 R09: fffffbfff1ff7c19
R10: fffffbfff1ff7c19 R11: 1ffffffff1ff7c18 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880b902a240 R15: 1ffff9200067ff24
 clock_was_set+0x642/0x840 kernel/time/hrtimer.c:955
 timekeeping_inject_offset+0x578/0x620 kernel/time/timekeeping.c:1378
 do_adjtimex+0x418/0x9b0 kernel/time/timekeeping.c:2427
 do_clock_adjtime kernel/time/posix-timers.c:1155 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1167 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1158 [inline]
 __x64_sys_clock_adjtime+0x1f0/0x2a0 kernel/time/posix-timers.c:1158
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7e5788aae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7e56c0c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f7e579a9f80 RCX: 00007f7e5788aae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f7e578d647a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7e579a9f80 R15: 00007ffdab281d38
 </TASK>