syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=0884/1/0x4000000000000000 softirq=11024/11024 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=8117, q=351 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5922 Comm: syz-executor351 Not tainted 6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:lock_release+0x624/0xa30 kernel/locking/lockdep.c:5875
Code: f8 01 0f 85 9a 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 a8 96 89 00 48 c7 84 24 90 00 00 00 00 00 00 00 <9c> 8f 84 24 90 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 95 95 89
RSP: 0018:ffffc90000007b60 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000000f7e RCX: ffffc90000007b03
RDX: 0000000000000001 RSI: ffffffff8c2ab6a0 RDI: ffffffff8c8019c0
RBP: ffffc90000007c90 R08: ffffffff903bbe77 R09: 1ffffffff20777ce
R10: dffffc0000000000 R11: fffffbfff20777cf R12: 1ffff92000000f78
R13: 0000000000000046 R14: ffffc90000007bf0 R15: dffffc0000000000
FS:  00007f2c6d5706c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c6d570d58 CR3: 0000000030906000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1797 [inline]
 __hrtimer_run_queues+0x477/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 9e 3b 23 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d3 2c 8c f5 65 8b 05 54 a0 00 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000464f920 EFLAGS: 00000206
RAX: 860e3eb5e3147500 RBX: 1ffff920008c9f28 RCX: ffffffff819d25fa
RDX: dffffc0000000000 RSI: ffffffff8c2aa440 RDI: 0000000000000001
RBP: ffffc9000464f9b0 R08: ffffffff94511847 R09: 1ffffffff28a2308
R10: dffffc0000000000 R11: fffffbfff28a2309 R12: dffffc0000000000
R13: 1ffff920008c9f24 R14: ffffc9000464f940 R15: 0000000000000246
 clock_was_set+0x686/0x810 kernel/time/hrtimer.c:984
 timekeeping_inject_offset+0x3d2/0x520 kernel/time/timekeeping.c:1420
 do_adjtimex+0x60b/0xbb0 kernel/time/timekeeping.c:2520
 do_clock_adjtime kernel/time/posix-timers.c:1165 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1177 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1168 [inline]
 __x64_sys_clock_adjtime+0x1e1/0x290 kernel/time/posix-timers.c:1168
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c6dde93a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 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:00007f2c6d570168 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f2c6de731d8 RCX: 00007f2c6dde93a9
RDX: 00007f2c6ddc1b46 RSI: 0000400000000040 RDI: 0000000000000000
RBP: 00007f2c6de731d0 R08: 00007ffe6dab3ed7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2c6de731dc
R13: 000000000000006e R14: 00007ffe6dab3df0 R15: 00007ffe6dab3ed8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g8117 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=15343
rcu: rcu_preempt kthread starved for 10502 jiffies! g8117 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:26104 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>