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sched_ext: INIT_LIST_HEAD() &sch->all in scx_alloc_and_add_sched()

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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: 54be8de423 ("sched_ext: Factor out scx_link_sched() and scx_unlink_sched()")
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2026-05-11 13:18:19 -10:00
parent 39e25a2100
commit b273b75b8d
1 changed files with 1 additions and 0 deletions
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kernel/sched/ext.c
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@@ -6635,6 +6635,7 @@ 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);