rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=8077, q=63 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955417-4294944915), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g8077 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:26912 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4296 Comm: syz-executor797 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:125 [inline]
RIP: 0010:check_preemption_disabled+0x59/0x110 lib/smp_processor_id.c:19
Code: 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 <f7> 04 24 00 02 00 00 74 cc 65 4c 8b 3d 26 98 ea 75 41 f6 47 2f 04
RSP: 0018:ffffc90003e77e08 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffffff8a8c1260 RDI: ffffffff8adef3a0
RBP: ffffc90003e77ef0 R08: dffffc0000000000 R09: fffffbfff1c3ed96
R10: fffffbfff1c3ed96 R11: 1ffffffff1c3ed95 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88802c20bb80 R15: 0000000000000000
FS:  000055558dcc7480(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 00000000769c4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
 lockdep_hardirqs_on_prepare+0x1b4/0x760 kernel/locking/lockdep.c:4314
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 syscall_enter_from_user_mode+0x21/0x80 kernel/entry/common.c:117
 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:77
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8090b487e9
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffec5c1f3c0 EFLAGS: 00000202 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8090b487e9
RDX: 00007ffec5c1f3c0 RSI: 00007ffec5c1f4f0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f8090bd405c R09: 00007f8090bd405c
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f8090bd405c
R13: 00007f8090bcd10f R14: 00007ffec5c1f990 R15: 0000000000000000
 </TASK>