[PATCH] fs:unicode: Fix the potential stack overflow risk

[jianchunfu <jianchunfu@xxxxxxxxxxxxxxxxxxxx>]

Add judgment to fix the potential stack overflow risk.

Signed-off-by: jianchunfu <jianchunfu@xxxxxxxxxxxxxxxxxxxx>
---
 fs/unicode/mkutf8data.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/unicode/mkutf8data.c b/fs/unicode/mkutf8data.c
index bc1a7c8b5..8c2ace050 100644
--- a/fs/unicode/mkutf8data.c
+++ b/fs/unicode/mkutf8data.c
@@ -495,6 +495,10 @@ static struct node *alloc_node(struct node *parent)
 	int bitnum;
 
 	node = malloc(sizeof(*node));
+	if (!node) {
+		printf("Memory allocation failed\n");
+		exit(1);
+	}
 	node->left = node->right = NULL;
 	node->parent = parent;
 	node->leftnode = NODE;
-- 
2.18.4