Commit 9b4e35e7 authored May 08, 2024 by Chen Ridong

cgroup/cpuset: fix general protection fault in update_cpumask

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9N7NY



----------------------------------------------------------------------

In alloc_cpumasks, pmask4 may be null if cs is null, so it may lead to
null pointer reference. Just make sure pmask4 is not null before
assessing it.

Fixes: 1e0b07ac ("cgroup/cpuset: Add cpuset.cpus.exclusive for v2")
Signed-off-by: Chen Ridong <chenridong@huawei.com>

parent afd82dd9

kernel/cgroup/cpuset.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -675,6 +675,7 @@ static inline int alloc_cpumasks(struct cpuset cs, struct tmpmasks tmp)

		#ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY
		free_four:
		if (pmask4)
		free_cpumask_var(*pmask4);
		#endif
		free_three: