From: Steve French Date: Mon, 22 Jan 2007 01:19:30 +0000 (+0000) Subject: [CIFS] Fix oops when Windows server sent bad domain name null terminator X-Git-Tag: v2.6.20^0~147^2 X-Git-Url: http://www2.kernel.org/git/?p=linux%2Fkernel%2Fgit%2Fsfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=8e6f195af0e1f226e9b2e0256af8df46adb9d595 [CIFS] Fix oops when Windows server sent bad domain name null terminator Fixes RedHat bug 211672 Windows sends one byte (instead of two) of null to terminate final Unicode string (domain name) in session setup response in some cases - this caused cifs to misalign some informational strings (making it hard to convert from UCS16 to UTF8). Thanks to Shaggy for his help and Akemi Yagi for debugging/testing Signed-off-by: Shirish Pargaonkar Signed-off-by: Steve French --- diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index bbdda99..7584646 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -182,11 +182,14 @@ static int decode_unicode_ssetup(char ** pbcc_area, int bleft, struct cifsSesInf cFYI(1,("bleft %d",bleft)); - /* word align, if bytes remaining is not even */ - if(bleft % 2) { - bleft--; - data++; - } + /* SMB header is unaligned, so cifs servers word align start of + Unicode strings */ + data++; + bleft--; /* Windows servers do not always double null terminate + their final Unicode string - in which case we + now will not attempt to decode the byte of junk + which follows it */ + words_left = bleft / 2; /* save off server operating system */