rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4692/1:b..l
	(detected by 1, t=10502 jiffies, g=9929, q=130)
task:syz.0.132       state:R  running task     stack:27632 pid: 4692 ppid:  4193 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:task_pid_ptr kernel/pid.c:325 [inline]
RIP: 0010:__task_pid_nr_ns+0x16b/0x420 kernel/pid.c:500
Code: 09 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 16 8f 6e 00 41 bf 98 01 00 00 4d 03 3e 41 89 ee bf 05 00 00 00 <89> ee e8 fe 78 29 00 83 fd 04 0f 87 18 02 00 00 e8 90 75 29 00 4f
RSP: 0018:ffffc9000ca3fee0 EFLAGS: 00000282
RAX: 1ffff110054d3124 RBX: ffff888062df4108 RCX: ffff88802a698000
RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff203b018
R10: dffffc0000000000 R11: fffffbfff203b019 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000001 R15: ffff888021980e98
 task_tgid_vnr include/linux/sched.h:1588 [inline]
 __ia32_sys_getpid+0x19/0x20 kernel/sys.c:945
 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: 0033:0x7f62a893ebd7
RSP: 002b:00007f62a6b7ca48 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007f62a6b7cbb0 RCX: 00007f62a893ebd7
RDX: 00007f62a6b7ca80 RSI: 00007f62a6b7cbb0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f62a8bbe128 R14: 00007f62a8bbe090 R15: 00007ffec30d21c8
 </TASK>
rcu: rcu_preempt kthread starved for 10521 jiffies! g9929 f0x0 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:27536 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: 4691 Comm: syz.0.132 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:entry_SYSCALL_64_after_hwframe+0x57/0xd0
Code: 45 31 e4 45 31 ed 45 31 f6 45 31 ff 48 89 e7 48 63 f0 66 90 b9 48 00 00 00 65 48 8b 14 25 e8 6f 02 00 89 d0 48 c1 ea 20 0f 30 <0f> 1f 44 00 00 e8 ab 12 00 00 e8 a6 41 dd ff 0f 1f 44 00 00 48 8b
RSP: 0018:ffffc9000d29ff58 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000048
RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffffc9000d29ff58
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f62a6b9e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002700 CR3: 000000005c2cb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
RIP: 0033:0x7f62a893ebd7
Code: 8d 3d bd 8a 0b 00 e8 58 1d fa ff e8 a3 87 00 00 0f 1f 00 b8 68 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007f62a6b9da48 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007f62a6b9dbb0 RCX: 00007f62a893ebd7
RDX: 00007f62a6b9da80 RSI: 00007f62a6b9dbb0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f62a8bbe038 R14: 00007f62a8bbdfa0 R15: 00007ffec30d21c8
 </TASK>