rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5607/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=99533, q=666 ncpus=2)
task:syz-executor    state:R  running task     stack:22808 pid:5607  tgid:5607  ppid:5595   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 copy_pte_range mm/memory.c:1429 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x1c66/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4821/0x8380 kernel/fork.c:2311
 kernel_clone+0x176/0x9d0 kernel/fork.c:2771
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2913
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feb791c6c52
RSP: 002b:00007ffc7dc51320 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc7dc51320 RCX: 00007feb791c6c52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc7dc514ac R08: 0000000000000000 R09: 0000000000000001
R10: 00005555677d27d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000d48de R15: 00007ffc7dc51500
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g99533 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27496 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0xdd/0x2c0 kernel/sched/core.c:7376
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: d6 2c 62 00 48 89 df 5b e9 ed 10 68 00 be 03 00 00 00 5b e9 22 2d 20 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 8c 59 81 13 48 8b 34 24 65 48 8b 15 70 59
RSP: 0018:ffffc90000007e88 EFLAGS: 00000002
RAX: 8000000001000002 RBX: dffffc0000000000 RCX: ffffffff81f7b2bd
RDX: 0000000001000002 RSI: 0000000000000000 RDI: ffffffff8fa91580
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802c65b300
R13: 0000000000000001 R14: ffff8880b8228640 R15: 1bc16d674ec85b36
FS:  0000000000000000(0000) GS:ffff888122946000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e17ff8 CR3: 00000000903f9000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 000000000000293c DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:2040 [inline]
 __hrtimer_run_queues+0x75f/0x9c0 kernel/time/hrtimer.c:2131
 hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2250
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: a7 96 02 e9 53 50 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 48 17 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8fa07cf0 EFLAGS: 00000246
RAX: 0000000001ecae53 RBX: ffffffff8fa91580 RCX: ffffffff8bd47235
RDX: 0000000000000001 RSI: ffffffff8e3e3486 RDI: ffffffff8c625580
RBP: fffffbfff1f522b0 R08: 0000000000000001 R09: ffffed10170467bd
R10: ffff8880b8233deb R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffffffff1f40fa2 R15: dffffc0000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
 default_idle+0x9/0x10 arch/x86/kernel/process.c:768
 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x3ae/0x5b0 kernel/sched/idle.c:355
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454
 rest_init+0x2d3/0x2e0 init/main.c:732
 start_kernel+0x48e/0x490 init/main.c:1190
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x158
 </TASK>