rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=e21/1/0x4000000000000000 softirq=25196/25196 fqs=0 
	(detected by 0, t=10505 jiffies, g=32445, q=131)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8583 Comm: syz.5.893 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__lock_acquire+0xdfe/0x7c60 kernel/locking/lockdep.c:4985
Code: 00 00 49 89 de 49 c1 ee 03 43 80 3c 06 00 74 12 48 89 df e8 d4 26 60 00 49 b8 00 00 00 00 00 fc ff df 48 89 9c 24 b0 00 00 00 <4c> 8b 3b 48 83 7c 24 70 00 75 31 48 c7 c0 80 3f 0c 96 48 c1 e8 03
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00000046
RAX: 0000000000000f82 RBX: ffff8880667da8a0 RCX: ffffffff815c0b54
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ffbd2b0
RBP: ffffc90000dd0b10 R08: dffffc0000000000 R09: fffffbfff1ff7a57
R10: fffffbfff1ff7a57 R11: 1ffffffff1ff7a56 R12: ffff8880667da8f8
R13: ffff8880667d9dc0 R14: 1ffff1100ccfb514 R15: ffff8880667da8d8
FS:  00007f83ccdfe6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d1eff8 CR3: 000000007c0e8000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:364 [inline]
 advance_sched+0x47/0x940 net/sched/sch_taprio.c:716
 __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 5e 2c 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 b5 9e f7 65 8b 05 87 b3 4f 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000305f8e0 EFLAGS: 00000206
RAX: 5eb06efecbd98f00 RBX: 0000000000000a02 RCX: 5eb06efecbd98f00
RDX: dffffc0000000000 RSI: ffffffff8a0b18a0 RDI: 0000000000000001
RBP: ffffc9000305f960 R08: dffffc0000000000 R09: ffffed100c116a12
R10: ffffed100c116a12 R11: 1ffff1100c116a11 R12: dffffc0000000000
R13: ffff8880608b50d8 R14: ffff8880608b5088 R15: 1ffff9200060bf1c
 spin_unlock_irqrestore include/linux/spinlock.h:419 [inline]
 timerfd_clock_was_set+0x1a5/0x290 fs/timerfd.c:113
 clock_was_set+0x7b0/0x840 kernel/time/hrtimer.c:965
 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: 0033:0x7f83cebb7fc9
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:00007f83ccdfe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f83cee0f090 RCX: 00007f83cebb7fc9
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000000
RBP: 00007f83cec3af91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83cee0f128 R14: 00007f83cee0f090 R15: 00007ffce4408fb8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g32445 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=21664
rcu: rcu_preempt kthread starved for 10505 jiffies! g32445 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:28032 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8583 Comm: syz.5.893 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1666 [inline]
RIP: 0010:__hrtimer_run_queues+0x40d/0xc40 kernel/time/hrtimer.c:1749
Code: 49 83 c6 44 4c 89 f0 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 cd 04 00 00 41 21 1e 48 8b 44 24 18 <4c> 8d 70 28 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8
RSP: 0018:ffffc90000dd0d20 EFLAGS: 00000006
RAX: ffff88807a288340 RBX: 0000000000000001 RCX: ffff8880667d9dc0
RDX: 0000000000010000 RSI: ffff8880b912a390 RDI: ffff88807a288348
RBP: ffffc90000dd0e98 R08: dffffc0000000000 R09: fffffbfff1ad334e
R10: fffffbfff1ad334e R11: 1ffffffff1ad334d R12: ffff8880b912a350
R13: 1ffff1101722546a R14: ffff8880b912a240 R15: dffffc0000000000
FS:  00007f83ccdfe6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d1eff8 CR3: 000000007c0e8000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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 5e 2c 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 b5 9e f7 65 8b 05 87 b3 4f 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000305f8e0 EFLAGS: 00000206
RAX: 5eb06efecbd98f00 RBX: 0000000000000a02 RCX: 5eb06efecbd98f00
RDX: dffffc0000000000 RSI: ffffffff8a0b18a0 RDI: 0000000000000001
RBP: ffffc9000305f960 R08: dffffc0000000000 R09: ffffed100c116a12
R10: ffffed100c116a12 R11: 1ffff1100c116a11 R12: dffffc0000000000
R13: ffff8880608b50d8 R14: ffff8880608b5088 R15: 1ffff9200060bf1c
 spin_unlock_irqrestore include/linux/spinlock.h:419 [inline]
 timerfd_clock_was_set+0x1a5/0x290 fs/timerfd.c:113
 clock_was_set+0x7b0/0x840 kernel/time/hrtimer.c:965
 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: 0033:0x7f83cebb7fc9
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:00007f83ccdfe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f83cee0f090 RCX: 00007f83cebb7fc9
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000000
RBP: 00007f83cec3af91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83cee0f128 R14: 00007f83cee0f090 R15: 00007ffce4408fb8
 </TASK>