mm: huge_memory: use strscpy() instead of strcpy()

Replace strcpy() with strscpy() in mm/huge_memory.c

strcpy() has been deprecated because it is generally unsafe, so help to
eliminate it from the kernel source.

Link: KSPP#88
Link: https://lkml.kernel.org/r/20241101165719.1074234-7-mcanal@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Lance Yang <ioworker0@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: mairacanal

mm/huge_memory.c

@@ -969,7 +969,7 @@ static int __init setup_thp_anon(char *str)
 
 	if (!str || strlen(str) + 1 > PAGE_SIZE)
 		goto err;
-	strcpy(str_dup, str);
+	strscpy(str_dup, str);
 
 	always = huge_anon_orders_always;
 	madvise = huge_anon_orders_madvise;
@@ -4167,7 +4167,7 @@ static ssize_t split_huge_pages_write(struct file *file, const char __user *buf,
 
 		tok = strsep(&buf, ",");
 		if (tok) {
-			strcpy(file_path, tok);
+			strscpy(file_path, tok);
 		} else {
 			ret = -EINVAL;
 			goto out;