rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=21045, q=492 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4294971185-4294960686), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10499 jiffies! g21045 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27168 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0xf43/0x5890 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6856
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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 UID: 0 PID: 8347 Comm: syz.2.683 Not tainted 6.13.0-syzkaller-08265-g9c5968db9e62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__rb_change_child include/linux/rbtree_augmented.h:204 [inline]
RIP: 0010:__rb_erase_augmented include/linux/rbtree_augmented.h:242 [inline]
RIP: 0010:rb_erase+0x760/0x1360 lib/rbtree.c:443
Code: 8d 78 08 48 ba 00 00 00 00 00 fc ff df 48 89 fe 48 c1 ee 03 80 3c 16 00 0f 85 83 09 00 00 48 89 58 08 4c 89 eb e9 81 fc ff ff <48> b8 00 00 00 00 00 fc ff df 48 89 ca 48 c1 ea 03 80 3c 02 00 0f
RSP: 0018:ffffc90000a18d80 EFLAGS: 00000093
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff8880b872c8d0
RDX: 1ffff1100be16068 RSI: ffff8880b872c8d0 RDI: ffff88805f0b0350
RBP: ffff8880b872c8d0 R08: 0000000000000006 R09: 0000000000000001
R10: ffff88805f0b0340 R11: 0000000000000002 R12: ffff8880b872c8d8
R13: ffff88805f0b0340 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc85aba36c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3087a1 CR3: 000000005cfa2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rb_erase_cached include/linux/rbtree.h:126 [inline]
 timerqueue_del+0x83/0x150 lib/timerqueue.c:57
 __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1108
 __run_hrtimer kernel/time/hrtimer.c:1718 [inline]
 __hrtimer_run_queues+0x50b/0xae0 kernel/time/hrtimer.c:1802
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1864
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/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+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 d6 a2 3e f6 48 89 df e8 2e 22 3f f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 95 fa 2f f6 65 8b 05 16 e2 ab 74 85 c0 74 16 5b
RSP: 0018:ffffc900051cfa60 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff8880b862c680 RCX: 1ffffffff2dd7473
RDX: 0000000000000000 RSI: ffffffff8b6cd8e0 RDI: ffffffff8bd2fec0
RBP: 0000000000000282 R08: 0000000000000001 R09: fffffbfff2dd7398
R10: ffffffff96eb9cc7 R11: 0000000000000001 R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
 clock_was_set+0x591/0x850 kernel/time/hrtimer.c:959
 timekeeping_inject_offset+0x402/0x520 kernel/time/timekeeping.c:1420
 do_adjtimex+0x369/0xaa0 kernel/time/timekeeping.c:2520
 do_clock_adjtime kernel/time/posix-timers.c:1165 [inline]
 __do_sys_clock_adjtime+0x173/0x290 kernel/time/posix-timers.c:1177
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc859d8cd29
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:00007fc85aba3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fc859fa5fa0 RCX: 00007fc859d8cd29
RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000000
RBP: 00007fc859e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc859fa5fa0 R15: 00007ffdf3ef0158
 </TASK>