linux-kernel - [PATCH] cgroup/cpuset: Fix retval in update

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Message-ID: <20240229101116.60043-1-kamalesh.babulal@oracle.com>
Date: Thu, 29 Feb 2024 15:41:14 +0530
From: Kamalesh Babulal <kamalesh.babulal@...cle.com>
To: Waiman Long <longman@...hat.com>
Cc: Zefan Li <lizefan.x@...edance.com>, Tejun Heo <tj@...nel.org>,
        Tom Hromatka <tom.hromatka@...cle.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] cgroup/cpuset: Fix retval in update_cpumask()

The update_cpumask(), checks for newly requested cpumask by calling
validate_change(), which returns an error on passing an invalid set
of cpu(s). Independent of the error returned, update_cpumask() always
returns zero, suppressing the error and returning success to the user
on writing an invalid cpu range for a cpuset. Fix it by returning
retval instead, which is returned by validate_change().

Fixes: 99fe36ba6fc1 ("cgroup/cpuset: Improve temporary cpumasks handling")
Signed-off-by: Kamalesh Babulal <kamalesh.babulal@...cle.com>
---
 kernel/cgroup/cpuset.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index ba36c073304a..2ddbfaa4efa9 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2562,7 +2562,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
 		update_partition_sd_lb(cs, old_prs);
 out_free:
 	free_cpumasks(NULL, &tmp);
-	return 0;
+	return retval;
 }
 
 /**

base-commit: cf1182944c7cc9f1c21a8a44e0d29abe12527412
-- 
2.44.0