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util: Fix possible NULL dereference

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Commit 1a80b97d, which added the virCgroupHasEmptyTasks() function
forgot that the parameter @cgroup may be NULL and did not check that.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Martin Kletzander 2014-12-19 17:40:41 +01:00
parent f5070e3ad0
commit 3b0f05573f
1 changed files with 3 additions and 0 deletions
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src/util/vircgroup.c
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@ -3932,6 +3932,9 @@ virCgroupHasEmptyTasks(virCgroupPtr cgroup, int controller)
int ret = -1;
char *content = NULL;
if (!cgroup)
return -1;
ret = virCgroupGetValueStr(cgroup, controller, "tasks", &content);
if (ret == 0 && content[0] == '\0')