rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=86937, q=3 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295017046-4295006544), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g86937 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:27760 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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: 11439 Comm: syz.2.1923 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:lock_is_held_type+0x0/0x190 kernel/locking/lockdep.c:5690
Code: 30 f2 03 00 75 d6 48 c7 c7 c0 0f 8c 8a 48 c7 c6 00 10 8c 8a e8 11 ed 1f f7 0f 0b eb bf e8 98 fd ff ff 0f 1f 84 00 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc900001e0c98 EFLAGS: 00000002
RAX: ffffffff886379ff RBX: 0000000000000001 RCX: 0000000000010000
RDX: ffff88802ea68000 RSI: 00000000ffffffff RDI: ffff88805861c300
RBP: ffff88805861c340 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200003c184 R12: ffff88805861c2e8
R13: dffffc0000000000 R14: ffff88805861c000 R15: ffff888057addb00
FS:  00007ff7df5b36c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7de84edd5 CR3: 000000005fde1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:283 [inline]
 advance_sched+0xd6/0x970 net/sched/sch_taprio.c:703
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215
Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 10 81 9d 0c 48 89 de 5b e9 b7 42 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d e4 f9 7f 7e 65 8b 15 e5 f9 7f 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90004ea7bc0 EFLAGS: 00000202
RAX: ffffffff81f593d4 RBX: 1ffff920009d4f90 RCX: b539fad23c492400
RDX: ffff88802ea68000 RSI: ffffffff8adf1380 RDI: ffffffff8adf1340
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff215f248
R10: dffffc0000000000 R11: fffffbfff215f249 R12: 1ffffffff1c3fec6
R13: ffff8880b8f2a5c0 R14: 0000000000000002 R15: 000000a1ad68c0e8
 rcu_read_lock include/linux/rcupdate.h:792 [inline]
 timerfd_clock_was_set+0x74/0x2c0 fs/timerfd.c:103
 clock_was_set+0x8de/0x9a0 kernel/time/hrtimer.c:1001
 do_settimeofday64+0x5b6/0x760 kernel/time/timekeeping.c:1345
 __do_sys_clock_settime kernel/time/posix-timers.c:1125 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1113 [inline]
 __x64_sys_clock_settime+0x25a/0x2a0 kernel/time/posix-timers.c:1113
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff7de79c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff7df5b3028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007ff7dea15fa0 RCX: 00007ff7de79c819
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0100000000000000
RBP: 00007ff7de832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff7dea16038 R14: 00007ff7dea15fa0 R15: 00007fff6e10e8a8
 </TASK>
vkms_vblank_simulate: vblank timer overrun