summaryrefslogtreecommitdiff
path: root/fs/smb/server
diff options
context:
space:
mode:
authorNamjae Jeon <linkinjeon@kernel.org>2023-11-07 21:04:31 +0900
committerSteve French <stfrench@microsoft.com>2023-11-07 18:54:25 -0600
commit5a5409d90bd05f87fe5623a749ccfbf3f7c7d400 (patch)
treef39eaec78fe1e2fcc08124bcd140fe83cf3a6716 /fs/smb/server
parentf6049712e520287ad695e9d4f1572ab76807fa0c (diff)
ksmbd: handle malformed smb1 message
If set_smb1_rsp_status() is not implemented, It will cause NULL pointer dereferece error when client send malformed smb1 message. This patch add set_smb1_rsp_status() to ignore malformed smb1 message. Cc: stable@vger.kernel.org Reported-by: Robert Morris <rtm@csail.mit.edu> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb/server')
-rw-r--r--fs/smb/server/smb_common.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/smb/server/smb_common.c b/fs/smb/server/smb_common.c
index e6ba1e9b8589..6691ae68af0c 100644
--- a/fs/smb/server/smb_common.c
+++ b/fs/smb/server/smb_common.c
@@ -366,11 +366,22 @@ static int smb1_allocate_rsp_buf(struct ksmbd_work *work)
return 0;
}
+/**
+ * set_smb1_rsp_status() - set error type in smb response header
+ * @work: smb work containing smb response header
+ * @err: error code to set in response
+ */
+static void set_smb1_rsp_status(struct ksmbd_work *work, __le32 err)
+{
+ work->send_no_response = 1;
+}
+
static struct smb_version_ops smb1_server_ops = {
.get_cmd_val = get_smb1_cmd_val,
.init_rsp_hdr = init_smb1_rsp_hdr,
.allocate_rsp_buf = smb1_allocate_rsp_buf,
.check_user_session = smb1_check_user_session,
+ .set_rsp_status = set_smb1_rsp_status,
};
static int smb1_negotiate(struct ksmbd_work *work)