tools/vm/page_owner_sort.c: add a security check

Add a security check after using malloc() to allocate memory.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jiajian Ye <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Yinan Zhang <[email protected]>
Cc: Yixuan Cao <[email protected]>
Cc: Zhenliang Wei <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index 79d69c3b84ed..69fb6ca7c0b7 100644
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -217,7 +217,13 @@ static void add_list(char *buf, int len)
 		printf("max_size too small??\n");
 		exit(1);
 	}
+
 	list[list_size].txt = malloc(len+1);
+	if (!list[list_size].txt) {
+		printf("Out of memory\n");
+		exit(1);
+	}
+
 	list[list_size].len = len;
 	list[list_size].num = 1;
 	list[list_size].page_num = get_page_num(buf);