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authorSteve French <smfrench@gmail.com>2014-06-22 20:38:49 -0500
committerSteve French <smfrench@gmail.com>2014-06-24 08:10:24 -0500
commitce36d9ab3bab06b7b5522f5c8b68fac231b76ffb (patch)
tree32752d15bb72dff8f1d7c4a8b19dd8808051f8f0 /fs/cifs
parent08bc03539d38508eff3fd470a82ea422ce279f6e (diff)
[CIFS] fix mount failure with broken pathnames when smb3 mount with mapchars option
When we SMB3 mounted with mapchars (to allow reserved characters : \ / > < * ? via the Unicode Windows to POSIX remap range) empty paths (eg when we open "" to query the root of the SMB3 directory on mount) were not null terminated so we sent garbarge as a path name on empty paths which caused SMB2/SMB2.1/SMB3 mounts to fail when mapchars was specified. mapchars is particularly important since Unix Extensions for SMB3 are not supported (yet) Signed-off-by: Steve French <smfrench@gmail.com> Cc: <stable@vger.kernel.org> Reviewed-by: David Disseldorp <ddiss@suse.de>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_unicode.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 0227b45ef00a..15e9505aa35f 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -290,7 +290,8 @@ int
cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
const struct nls_table *cp, int mapChars)
{
- int i, j, charlen;
+ int i, charlen;
+ int j = 0;
char src_char;
__le16 dst_char;
wchar_t tmp;
@@ -298,12 +299,11 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
if (!mapChars)
return cifs_strtoUTF16(target, source, PATH_MAX, cp);
- for (i = 0, j = 0; i < srclen; j++) {
+ for (i = 0; i < srclen; j++) {
src_char = source[i];
charlen = 1;
switch (src_char) {
case 0:
- put_unaligned(0, &target[j]);
goto ctoUTF16_out;
case ':':
dst_char = cpu_to_le16(UNI_COLON);
@@ -350,6 +350,7 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
}
ctoUTF16_out:
+ put_unaligned(0, &target[j]); /* Null terminate target unicode string */
return j;
}