linux-kernel - [PATCH] kernel: fix acct.c first test openai codex

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Message-ID: <01100196db61ea58-123409dc-7381-487b-91b6-166193f3f349-000000@eu-north-1.amazonses.com>
Date: Fri, 16 May 2025 23:15:49 +0000
From: Ozgur Kara <ozgur@...sey.org>
To: Christian Brauner <brauner@...nel.org>, Jens Axboe <axboe@...nel.dk>, 
	Jeff Layton <jlayton@...nel.org>, Song Liu <song@...nel.org>, 
	Joel Granados <joel.granados@...nel.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] kernel: fix acct.c first test openai codex

From: Ozgur Karatas <ozgur@...sey.org>

Hello,

i want to try out the openai codex and it seemed like a logical
process so with rcu_read_lock() a protection is started but we dont
call rcu_read_unlock(); it has to be called to end rcu read lock.

I guess, this means rcu stays open forever and data structures are not
cleaned which causes performance degradation.

Regards

Ozgur

Reported-by: Ozgur Karatas <ozgur@...sey.org>
---
 kernel/acct.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/acct.c b/kernel/acct.c
index 6520baa13669..8a2b75063d16 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -330,6 +330,7 @@ SYSCALL_DEFINE1(acct, const char __user *, name)
        } else {
                rcu_read_lock();
                pin_kill(task_active_pid_ns(current)->bacct);
+               rcu_read_unlock();
        }

        return error;
--
2.39.5