ksmbd: validate request buffer size in smb2_allocate_rsp_buf()
commit 17cf0c2794
upstream.
The response buffer should be allocated in smb2_allocate_rsp_buf
before validating request. But the fields in payload as well as smb2 header
is used in smb2_allocate_rsp_buf(). This patch add simple buffer size
validation to avoid potencial out-of-bounds in request buffer.
Cc: stable@vger.kernel.org
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
0977f89722
commit
2c27a64a2b
|
@ -535,6 +535,10 @@ int smb2_allocate_rsp_buf(struct ksmbd_work *work)
|
|||
if (cmd == SMB2_QUERY_INFO_HE) {
|
||||
struct smb2_query_info_req *req;
|
||||
|
||||
if (get_rfc1002_len(work->request_buf) <
|
||||
offsetof(struct smb2_query_info_req, OutputBufferLength))
|
||||
return -EINVAL;
|
||||
|
||||
req = smb2_get_msg(work->request_buf);
|
||||
if ((req->InfoType == SMB2_O_INFO_FILE &&
|
||||
(req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
|
||||
|
|
Loading…
Reference in New Issue