rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=50465, q=337 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294985861-4294975359), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g50465 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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: 13306 Comm: syz.1.2554 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1745 [inline]
RIP: 0010:__hrtimer_run_queues+0x2a8/0xc60 kernel/time/hrtimer.c:1841
Code: ff e8 bc 93 9a 09 89 c3 31 ff 89 c6 e8 61 80 12 00 85 db 0f 84 8c 04 00 00 e8 14 7c 12 00 eb 05 e8 0d 7c 12 00 48 8b 5c 24 18 <4c> 89 e7 e8 c0 34 00 00 48 8b 44 24 48 42 80 3c 28 00 74 08 48 89
RSP: 0018:ffffc90000a08d40 EFLAGS: 00000006
RAX: ffffffff81ae013c RBX: ffff8880b8927cc8 RCX: ffff88807fbd9e40
RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a08e90 R08: ffff88805b544357 R09: ffff88805b544340
R10: dffffc0000000000 R11: ffffed100b6a886b R12: ffff88805b544340
R13: dffffc0000000000 R14: 1884f7ec64000000 R15: ffff8880b8927c80
FS:  00007f425123c6c0(0000) GS:ffff88812622d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f425123bf98 CR3: 0000000031bc3000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 bb 14 7d f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> c3 24 45 f6 65 8b 05 7c 08 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000493f9c0 EFLAGS: 00000206
RAX: e3b01bd5e2294f00 RBX: 0000000000000212 RCX: e3b01bd5e2294f00
RDX: 0000000000000000 RSI: ffffffff8d70fa6b RDI: 0000000000000001
RBP: ffffc9000493fa58 R08: ffffffff8f7cf277 R09: 1ffffffff1ef9e4e
R10: dffffc0000000000 R11: fffffbfff1ef9e4f R12: dffffc0000000000
R13: 1a5a1502f2afb247 R14: ffff888021390488 R15: 1ffff92000927f38
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 timerfd_clock_was_set+0x1ce/0x2c0 fs/timerfd.c:111
 clock_was_set+0x73b/0x7c0 kernel/time/hrtimer.c:975
 do_adjtimex+0x228/0x310 kernel/time/timekeeping.c:2753
 do_clock_adjtime kernel/time/posix-timers.c:1161 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1173 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1164 [inline]
 __x64_sys_clock_adjtime+0x211/0x2c0 kernel/time/posix-timers.c:1164
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f425038f749
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:00007f425123c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f42505e6090 RCX: 00007f425038f749
RDX: 0000000000000000 RSI: 0000200000000480 RDI: 0000000000000000
RBP: 00007f4250413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f42505e6128 R14: 00007f42505e6090 R15: 00007fff1562b0d8
 </TASK>