From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Mon, 25 Jan 2021 23:04:19 +0000 (+0100)
Subject: fs: fat: avoid out of bounds access warning
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=41ac28c67272d99836aebb840e5ab94b3ae14023;p=u-boot.git

fs: fat: avoid out of bounds access warning

When copying short name plus extension refer to the encapsulating structure
and not to the short name element.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---

diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index 0132ef9b42..aae3a6a3d1 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -108,10 +108,7 @@ static int set_name(fat_itr *itr, const char *filename, char *shortname)
 	char buf[13];
 	int i;
 	int ret;
-	struct {
-		char name[8];
-		char ext[3];
-	} dirent;
+	struct nameext dirent;
 
 	if (!filename)
 		return -EIO;
@@ -185,7 +182,7 @@ static int set_name(fat_itr *itr, const char *filename, char *shortname)
 	}
 	return -EIO;
 out:
-	memcpy(shortname, dirent.name, SHORT_NAME_SIZE);
+	memcpy(shortname, &dirent, SHORT_NAME_SIZE);
 	return ret;
 }