[PATCH OLK-5.10 v2 5/7] mm/dynamic_hugetlb: check NULL pointer for early parameter

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9K8D1 CVE: NA

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Add null pointer check for early parameter.

Fixes: a8a836a36072 ("mm/dynamic_hugetlb: establish the dynamic hugetlb feature framework") Signed-off-by: Liu Shixin liushixin2@huawei.com --- mm/dynamic_hugetlb.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/mm/dynamic_hugetlb.c b/mm/dynamic_hugetlb.c index bf217db405fb..dbdd8546994e 100644 --- a/mm/dynamic_hugetlb.c +++ b/mm/dynamic_hugetlb.c @@ -1250,6 +1250,9 @@ void __init dynamic_hugetlb_init(void)

static int __init dynamic_hugetlb_setup(char *s) { + if (!s) + return 0; + if (!strcmp(s, "on")) enable_dhugetlb = true; return 0;