From: Tejun Heo <tj@kernel.org>
To: David Vernet <void@manifault.com>,
Andrea Righi <arighi@nvidia.com>,
Changwoo Min <changwoo@igalia.com>
Cc: sched-ext@lists.linux.dev, Emil Tsalapatis <emil@etsalapatis.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH sched_ext/for-7.1-fixes] sched_ext: INIT_LIST_HEAD() &sch->all in scx_alloc_and_add_sched()
Date: Mon, 11 May 2026 13:18:19 -1000 [thread overview]
Message-ID: <6ec4a29c923e672d0dcb6f3ac037397e@kernel.org> (raw)
On scx_link_sched() error paths (parent disabled, hash insert failure),
&sch->all is never added to scx_sched_all. The cleanup path runs
scx_unlink_sched() unconditionally, which calls list_del_rcu(&sch->all) on a
list_head that was never initialized triggering a corruption warning.
Initialize &sch->all.
Fixes: 54be8de4236a ("sched_ext: Factor out scx_link_sched() and scx_unlink_sched()")
Signed-off-by: Tejun Heo <tj@kernel.org>
---
kernel/sched/ext.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 9354da79e162..1fb3329ae2b4 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -6643,6 +6643,7 @@ static struct scx_sched *scx_alloc_and_add_sched(struct sched_ext_ops *ops,
rcu_assign_pointer(ops->priv, sch);
sch->kobj.kset = scx_kset;
+ INIT_LIST_HEAD(&sch->all);
#ifdef CONFIG_EXT_SUB_SCHED
char *buf = kzalloc(PATH_MAX, GFP_KERNEL);
reply other threads:[~2026-05-11 23:18 UTC|newest]
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