ext2ed: fix potential NULL pointer dereference in dupstr()

In dupstr(), we should check return value of malloc().

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
Reviewed-by: Wu Bo <wubo40@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/ext2ed/main.c b/ext2ed/main.c
index f7e7d7d..9d33a8e 100644 (file)
--- a/ext2ed/main.c
+++ b/ext2ed/main.c
@@ -524,6 +524,8 @@ char *dupstr (char *src)
        char *ptr;
 
        ptr=(char *) malloc (strlen (src)+1);
+       if (!ptr)
+               return NULL;
        strcpy (ptr,src);
        return (ptr);
 }