udf: Make udf_get_filename() return error instead of 0 length file name
Zero length file name isn't really valid. So check the length of the
final file name generated by udf_translate_to_linux() and return -EINVAL
instead of zero length file name. Update caller of udf_get_filename() to
not check for 0 return value.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 97b23b0..ab478e6 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -333,7 +333,7 @@
uint8_t *dname, int dlen)
{
struct ustr *filename, *unifilename;
- int ret = 0;
+ int ret;
if (!slen)
return -EIO;
@@ -370,6 +370,9 @@
ret = udf_translate_to_linux(dname, dlen,
filename->u_name, filename->u_len,
unifilename->u_name, unifilename->u_len);
+ /* Zero length filename isn't valid... */
+ if (ret == 0)
+ ret = -EINVAL;
out2:
kfree(unifilename);
out1: