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authorChen Gang <gang.chen@asianux.com>2013-07-19 09:01:36 +0800
committerSteve French <smfrench@gmail.com>2013-07-30 23:54:40 -0500
commit057d6332b24a4497c55a761c83c823eed9e3f23b (patch)
tree15ad5c70288bc61084fd01c2f9b0db208d581c12 /fs/cifs/cifsencrypt.c
parentecb2cf1a6b63825a258ff4fe0d7f3070fbe4676b (diff)
cifs: extend the buffer length enought for sprintf() using
For cifs_set_cifscreds() in "fs/cifs/connect.c", 'desc' buffer length is 'CIFSCREDS_DESC_SIZE' (56 is less than 256), and 'ses->domainName' length may be "255 + '\0'". The related sprintf() may cause memory overflow, so need extend related buffer enough to hold all things. It is also necessary to be sure of 'ses->domainName' must be less than 256, and define the related macro instead of hard code number '256'. Signed-off-by: Chen Gang <gang.chen@asianux.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Scott Lovenberg <scott.lovenberg@gmail.com> CC: <stable@vger.kernel.org> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifsencrypt.c')
-rw-r--r--fs/cifs/cifsencrypt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 45e57cc38200..194f9cce5d83 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -421,7 +421,7 @@ find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
if (blobptr + attrsize > blobend)
break;
if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
- if (!attrsize)
+ if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
break;
if (!ses->domainName) {
ses->domainName =