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cifs: Skip any trailing backslashes from UNC

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When extracting hostname from UNC, check for leading backslashes
before trying to remove them.

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2018-11-14 14:03:40 -02:00 committed by Steve French
parent 56c762eb9b
commit c34fea5a63
1 changed files with 6 additions and 1 deletions
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7
fs/cifs/connect.c
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@ -1044,7 +1044,12 @@ extract_hostname(const char *unc)
/* skip double chars at beginning of string */
/* BB: check validity of these bytes? */
src = unc + 2;
if (strlen(unc) < 3)
return ERR_PTR(-EINVAL);
for (src = unc; *src && *src == '\\'; src++)
;
if (!*src)
return ERR_PTR(-EINVAL);
/* delimiter between hostname and sharename is always '\\' now */
delim = strchr(src, '\\');