From: Christian Loehle <christian.loehle@arm.com>
To: Andrea Righi <arighi@nvidia.com>, Tejun Heo <tj@kernel.org>,
David Vernet <void@manifault.com>,
Changwoo Min <changwoo@igalia.com>
Cc: sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched_ext: Fix use of uninitialized variable in scx_bpf_cpuperf_set()
Date: Wed, 29 Oct 2025 13:37:42 +0000 [thread overview]
Message-ID: <4ece27d2-0948-4d28-84b8-063bddc3e38f@arm.com> (raw)
In-Reply-To: <20251029130843.2977395-1-arighi@nvidia.com>
On 10/29/25 13:08, Andrea Righi wrote:
> scx_bpf_cpuperf_set() has a typo where it dereferences the local
> variable @sch, instead of the global @scx_root pointer. Fix by
> dereferencing the correct variable.
>
> Fixes: 956f2b11a8a4f ("sched_ext: Drop kf_cpu_valid()")
> Signed-off-by: Andrea Righi <arighi@nvidia.com>
> ---
> kernel/sched/ext.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
> index ecb251e883eab..1a019a7728fb2 100644
> --- a/kernel/sched/ext.c
> +++ b/kernel/sched/ext.c
> @@ -6401,7 +6401,7 @@ __bpf_kfunc void scx_bpf_cpuperf_set(s32 cpu, u32 perf)
>
> guard(rcu)();
>
> - sch = rcu_dereference(sch);
> + sch = rcu_dereference(scx_root);
> if (unlikely(!sch))
> return;
>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
next prev parent reply other threads:[~2025-10-29 13:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-29 13:08 Andrea Righi
2025-10-29 13:37 ` Christian Loehle [this message]
2025-10-29 15:17 ` Tejun Heo
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