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authorSteve French <sfrench@us.ibm.com>2007-01-22 01:19:30 +0000
committerSteve French <sfrench@us.ibm.com>2007-01-22 01:19:30 +0000
commit8e6f195af0e1f226e9b2e0256af8df46adb9d595 (patch)
tree343ce515f09b4510d73871f2e67963183cdc8085 /fs/cifs/sess.c
parentbd2abf177b3384375c43906be551d976e4c18166 (diff)
[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 <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/sess.c')
-rw-r--r--fs/cifs/sess.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index bbdda99dce6..75846463089 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 */