mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

cgroup/cpuset: Fix a memory leak in update_exclusive_cpumask() 

commit 66f40b926d upstream.

Fix a possible memory leak in update_exclusive_cpumask() by moving the
alloc_cpumasks() down after the validate_change() check which can fail
and still before the temporary cpumasks are needed.

Fixes: e2ffe502ba ("cgroup/cpuset: Add cpuset.cpus.exclusive for v2")
Reported-and-tested-by: Mirsad Todorovac <mirsad.todorovac@alu.hr>
Closes: https://lore.kernel.org/lkml/14915689-27a3-4cd8-80d2-9c30d0c768b6@alu.unizg.hr
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v6.7+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Waiman Long 2024-02-27 19:58:01 -05:00 committed by Greg Kroah-Hartman
parent 29727355ac
commit 3b033f72b6
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/cgroup/cpuset.c
View File

@ -2502,9 +2502,6 @@ static int update_exclusive_cpumask(struct cpuset *cs, struct cpuset *trialcs,
if (cpumask_equal(cs->exclusive_cpus, trialcs->exclusive_cpus))
return 0;
if (alloc_cpumasks(NULL, &tmp))
return -ENOMEM;
if (*buf)
compute_effective_exclusive_cpumask(trialcs, NULL);
@ -2519,6 +2516,9 @@ static int update_exclusive_cpumask(struct cpuset *cs, struct cpuset *trialcs,
if (retval)
return retval;
if (alloc_cpumasks(NULL, &tmp))
return -ENOMEM;
if (old_prs) {
if (cpumask_empty(trialcs->effective_xcpus)) {
invalidate = true;