rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=6661, q=80)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294954681-4294944179), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g6661 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:26960 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
 rcu_gp_fqs_loop+0x2be/0x11d0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9b/0x370 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4451 Comm: syz.4.35 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:kvm_sched_clock_read+0x24/0x40 arch/x86/kernel/kvmclock.c:91
Code: d4 0f 1f 44 00 00 65 ff 05 61 a6 cd 7e 65 48 8b 3d 21 ab cd 7e e8 bc 05 00 00 65 ff 0d 4d a6 cd 7e 74 08 48 2b 05 b4 75 ae 0a <c3> e8 ae b3 cb ff 48 2b 05 a7 75 ae 0a c3 00 00 cc cc 00 00 cc cc
RSP: 0018:ffffc90000007ea8 EFLAGS: 00000016
RAX: 00000028eb92be3c RBX: ffff8880b9027780 RCX: 0000000000000001
RDX: 1ffffffff1e1d400 RSI: ffffffff8f0ea01c RDI: ffffffff8f0ea000
RBP: 0000000000000000 R08: ffffffff8f0ea008 R09: ffffffff8f0ea018
R10: ffffffff8f0ea010 R11: ffffffff8f0ea003 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802adf8000 R15: ffffffff8be33820
FS:  00007f6e368ec6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000080 CR3: 0000000061209000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 sched_clock_cpu+0x15/0x3c0 kernel/sched/clock.c:371
 irqtime_account_irq+0x6a/0x1b0 kernel/sched/cputime.c:61
 account_hardirq_exit include/linux/vtime.h:159 [inline]
 __irq_exit_rcu+0x99/0x230 kernel/softirq.c:656
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 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:bytes_is_nonzero mm/kasan/generic.c:84 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x6e/0x290 mm/kasan/generic.c:189
Code: 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e ff 4d 89 c1 49 c1 e9 03 4b 8d 1c 21 49 89 df 4d 29 df 49 83 ff 10 7f 29 <4d> 85 ff 0f 84 38 01 00 00 4c 89 cb 48 f7 d3 4c 01 f3 41 80 3b 00
RSP: 0018:ffffc900032dfb10 EFLAGS: 00000283
RAX: ffffffff812c5501 RBX: ffffed10055bf001 RCX: ffffffff812c551a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802adf8000
RBP: ffffc900032dfcf0 R08: ffff88802adf8007 R09: 1ffff110055bf000
R10: dffffc0000000000 R11: ffffed10055bf000 R12: dffffc0000000001
R13: ffff88802adf8000 R14: 1ffff110055bf000 R15: 0000000000000001
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 test_ti_thread_flag include/linux/thread_info.h:118 [inline]
 restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:-1 [inline]
 __fpu_restore_sig arch/x86/kernel/fpu/signal.c:334 [inline]
 fpu__restore_sig+0x5ca/0x1060 arch/x86/kernel/fpu/signal.c:466
 restore_sigcontext arch/x86/kernel/signal.c:139 [inline]
 __ia32_sys_rt_sigreturn+0x5e4/0x760 arch/x86/kernel/signal.c:674
 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: 0033:0x7f6e3859b0b1
Code: 89 d0 48 f7 64 24 68 41 8b 36 31 c0 48 c1 ea 12 48 01 ca 48 89 e9 48 2b 15 44 26 ee 00 e8 17 e4 fe ff 49 83 be 88 00 00 00 ff <0f> 84 c9 01 00 00 80 3d 27 26 ee 00 00 0f 85 6c 01 00 00 48 8b 44
RSP: 002b:00007f6e368ec050 EFLAGS: 00000213
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6e387880e7
RDX: 000000000001f1ad RSI: 0000000000000002 RDI: 00007f6e3876b73b
RBP: 00007f6e387880e7 R08: 0000000000000000 R09: 002709a982ff313c
R10: 0000005c09cb5a2b R11: 0000000000008466 R12: 0000000000000000
R13: 00007f6e3894e218 R14: 00007f6e3894e180 R15: 00007fff71e83af8
 </TASK>