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authorSteve French <sfrench@us.ibm.com>2009-02-17 01:29:40 +0000
committerSteve French <sfrench@us.ibm.com>2009-02-21 03:37:09 +0000
commit69765529d701c838df19ea1f5ad2f33a528261ae (patch)
tree229ce1fda799ac8f6553a87ed05516dd675b3eec
parent44f68fadd865bb288ebdcea2b602f0b1cab27a0c (diff)
[CIFS] Fix oops in cifs_strfromUCS_le mounting to servers which do not specify their OS
Fixes kernel bug #10451 http://bugzilla.kernel.org/show_bug.cgi?id=10451 Certain NAS appliances do not set the operating system or network operating system fields in the session setup response on the wire. cifs was oopsing on the unexpected zero length response fields (when trying to null terminate a zero length field). This fixes the oops. Acked-by: Jeff Layton <jlayton@redhat.com> CC: stable <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
-rw-r--r--fs/cifs/CHANGES3
-rw-r--r--fs/cifs/sess.c4
2 files changed, 4 insertions, 3 deletions
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 73ac7ebd1df..1cfa72ef1f3 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -7,7 +7,8 @@ specified and user does not have access to query information about the
top of the share. Fix problem in 2.6.28 resolving DFS paths to
Samba servers (worked to Windows). Fix rmdir so that pending search
(readdir) requests do not get invalid results which include the now
-removed directory.
+removed directory. Fix oops in cifs_dfs_ref.c when prefixpath is not reachable
+when using DFS.
Version 1.55
------------
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 5f22de7b79a..b234407a300 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -228,7 +228,7 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
kfree(ses->serverOS);
/* UTF-8 string will not grow more than four times as big as UCS-16 */
- ses->serverOS = kzalloc(4 * len, GFP_KERNEL);
+ ses->serverOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
if (ses->serverOS != NULL)
cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
data += 2 * (len + 1);
@@ -241,7 +241,7 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
return rc;
kfree(ses->serverNOS);
- ses->serverNOS = kzalloc(4 * len, GFP_KERNEL); /* BB this is wrong length FIXME BB */
+ ses->serverNOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
if (ses->serverNOS != NULL) {
cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
nls_cp);