[U-Boot] [PATCH v2] cramfs: fix bug for wrong filename comparison

[Holger Brunck]

"cramfsload uImage_1" succeeds even though the actual file is named
"uImage".

Fix file name comparison when one name is the prefix of the other.

Signed-off-by: Holger Brunck <holger.brunck at keymile.com>
cc: Wolfgang Denk <wd at denx.de>
cc: Albert ARIBAUD <albert.u.boot at aribaud.net> 
---
If we have the following entry in cramfs:
=> cramfsls
 -rw-r--r--  1922689 uImage

cramfsload would also succeed if we try to do:
=> cramfsload uImage_1
CRAMFS load complete: 1922689 bytes loaded to 0x100000

The old code succeeds if the begin of the filename we search matches
with a filename stored in cramfs. But the searched file may have
additional characters and is therfore not the file we are looking for.

 fs/cramfs/cramfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/cramfs/cramfs.c b/fs/cramfs/cramfs.c
index 910955d..e578a1e 100644
--- a/fs/cramfs/cramfs.c
+++ b/fs/cramfs/cramfs.c
@@ -126,7 +126,8 @@ static unsigned long cramfs_resolve (unsigned long begin, unsigned long offset,
 			namelen--;
 		}
 
-		if (!strncmp (filename, name, namelen)) {
+		if (!strncmp(filename, name, namelen) &&
+		    (namelen == strlen(filename))) {
 			char *p = strtok (NULL, "/");
 
 			if (raw && (p == NULL || *p == '\0'))
-- 
1.8.0.1