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cgroup/cpuset: Free sched domains on rebuild guard failure

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generate_sched_domains() returns sched-domain masks and optional
attributes that are normally handed to partition_sched_domains(), which
takes ownership of them.

rebuild_sched_domains_locked() has a WARN guard after
generate_sched_domains() and before partition_sched_domains() to avoid
passing offline CPUs into the scheduler domain rebuild path. If that
guard fires, the function currently returns directly without freeing
the generated doms and attr.

Free the generated sched-domain masks and attributes before returning
from the guard failure path.

Signed-off-by: Guopeng Zhang <zhangguopeng@kylinos.cn>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Guopeng Zhang
2026-05-28 17:37:42 +08:00
committed by Tejun Heo
parent 336f87d742
commit 390f2d73bc
1 changed files with 4 additions and 1 deletions
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5
kernel/cgroup/cpuset.c
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@@ -1004,8 +1004,11 @@ void rebuild_sched_domains_locked(void)
* prevent the panic.
*/
for (i = 0; doms && i < ndoms; i++) {
if (WARN_ON_ONCE(!cpumask_subset(doms[i], cpu_active_mask)))
if (WARN_ON_ONCE(!cpumask_subset(doms[i], cpu_active_mask))) {
free_sched_domains(doms, ndoms);
kfree(attr);
return;
}
}
/* Have scheduler rebuild the domains */