rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=7401, q=68 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294955892-4294945389), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g7401 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:28112 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4301 Comm: syz-executor143 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:should_fail_ex+0x5/0x4d0 lib/fault-inject.c:104
Code: ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 48 89 df e8 2a 48 9e fd e9 55 ff ff ff 0f 1f 44 00 00 55 41 57 41 56 <41> 55 41 54 53 48 83 ec 18 89 14 24 49 89 f6 48 89 fb 49 bc 00 00
RSP: 0018:ffffc90003fc7cb0 EFLAGS: 00000246
RAX: ffffffff84354265 RBX: 00000000000000c0 RCX: ffff88801e2d5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8d1c7160
RBP: ffffc90003fc7f10 R08: ffffffff8e2029ef R09: 1ffffffff1c4053d
R10: dffffc0000000000 R11: fffffbfff1c4053e R12: 1ffff920007f8fa8
R13: dffffc0000000000 R14: ffffc90003fc7d60 R15: 00007f8a37f20be8
FS:  00007f8a37f216c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000072ef3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 _copy_from_user+0x2c/0x170 lib/usercopy.c:15
 copy_from_user include/linux/uaccess.h:161 [inline]
 restore_sigcontext arch/x86/kernel/signal.c:92 [inline]
 __ia32_sys_rt_sigreturn+0x21d/0x760 arch/x86/kernel/signal.c:675
 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: 0033:0x7f8a37f2f909
Code: af 01 00 66 2e 0f 1f 84 00 00 00 00 00 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 0c 25
RSP: 002b:00007f8a37f20bc0 EFLAGS: 00000202 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f8a37ff3b48 RCX: 00007f8a37f2f909
RDX: 00007f8a37f20bc0 RSI: 00007f8a37f20cf0 RDI: 0000000000000021
RBP: 00007f8a37ff3b40 R08: 00007f8a37f21cdc R09: 00007f8a37f21cdc
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f8a37ff3b4c
R13: 0000000000000000 R14: 00007ffe3fafb690 R15: 00007ffe3fafb778
 </TASK>