Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

[linux-drm-fsl-dcu.git] / net / bluetooth / cmtp / capi.c

diff --git a/net/bluetooth/cmtp/capi.c b/net/bluetooth/cmtp/capi.c
index 6fb47e00e188bb2c292f3d7e94a7689651b832f8..3e9d5bb3fefb6de364353c62684efd5b7629e9d4 100644 (file)
--- a/net/bluetooth/cmtp/capi.c
+++ b/net/bluetooth/cmtp/capi.c
@@ -1,4 +1,4 @@
-/* 
+/*
    CMTP implementation for Linux Bluetooth stack (BlueZ).
    Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
 
@@ -10,13 +10,13 @@
    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
-   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
-   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
-   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
-   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
    SOFTWARE IS DISCLAIMED.
 */
 
@@ -75,15 +75,13 @@
 
 static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
 {
-       struct cmtp_application *app = kmalloc(sizeof(*app), GFP_KERNEL);
+       struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL);
 
        BT_DBG("session %p application %p appl %d", session, app, appl);
 
        if (!app)
                return NULL;
 
-       memset(app, 0, sizeof(*app));
-
        app->state = BT_OPEN;
        app->appl = appl;
 
@@ -198,6 +196,9 @@ static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *s
 
        switch (CAPIMSG_SUBCOMMAND(skb->data)) {
        case CAPI_CONF:
+               if (skb->len < CAPI_MSG_BASELEN + 10)
+                       break;
+
                func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
                info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);
 
@@ -228,6 +229,9 @@ static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *s
                        break;
 
                case CAPI_FUNCTION_GET_PROFILE:
+                       if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile))
+                               break;
+
                        controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
                        msgnum = CAPIMSG_MSGID(skb->data);
 
@@ -248,17 +252,26 @@ static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *s
                        break;
 
                case CAPI_FUNCTION_GET_MANUFACTURER:
+                       if (skb->len < CAPI_MSG_BASELEN + 15)
+                               break;
+
                        controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 10);
 
                        if (!info && ctrl) {
+                               int len = min_t(uint, CAPI_MANUFACTURER_LEN,
+                                               skb->data[CAPI_MSG_BASELEN + 14]);
+
+                               memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN);
                                strncpy(ctrl->manu,
-                                       skb->data + CAPI_MSG_BASELEN + 15,
-                                       skb->data[CAPI_MSG_BASELEN + 14]);
+                                       skb->data + CAPI_MSG_BASELEN + 15, len);
                        }
 
                        break;
 
                case CAPI_FUNCTION_GET_VERSION:
+                       if (skb->len < CAPI_MSG_BASELEN + 32)
+                               break;
+
                        controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
 
                        if (!info && ctrl) {
@@ -271,13 +284,18 @@ static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *s
                        break;
 
                case CAPI_FUNCTION_GET_SERIAL_NUMBER:
+                       if (skb->len < CAPI_MSG_BASELEN + 17)
+                               break;
+
                        controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
 
                        if (!info && ctrl) {
+                               int len = min_t(uint, CAPI_SERIAL_LEN,
+                                               skb->data[CAPI_MSG_BASELEN + 16]);
+
                                memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
                                strncpy(ctrl->serial,
-                                       skb->data + CAPI_MSG_BASELEN + 17,
-                                       skb->data[CAPI_MSG_BASELEN + 16]);
+                                       skb->data + CAPI_MSG_BASELEN + 17, len);
                        }
 
                        break;
@@ -286,14 +304,18 @@ static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *s
                break;
 
        case CAPI_IND:
+               if (skb->len < CAPI_MSG_BASELEN + 6)
+                       break;
+
                func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);
 
                if (func == CAPI_FUNCTION_LOOPBACK) {
+                       int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6,
+                                               skb->data[CAPI_MSG_BASELEN + 5]);
                        appl = CAPIMSG_APPID(skb->data);
                        msgnum = CAPIMSG_MSGID(skb->data);
                        cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
-                                               skb->data + CAPI_MSG_BASELEN + 6,
-                                               skb->data[CAPI_MSG_BASELEN + 5]);
+                                               skb->data + CAPI_MSG_BASELEN + 6, len);
                }
 
                break;
@@ -311,6 +333,9 @@ void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
 
        BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 
+       if (skb->len < CAPI_MSG_BASELEN)
+               return;
+
        if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
                cmtp_recv_interopmsg(session, skb);
                return;
@@ -538,7 +563,7 @@ int cmtp_attach_device(struct cmtp_session *session)
 
        ret = wait_event_interruptible_timeout(session->wait,
                        session->ncontroller, CMTP_INTEROP_TIMEOUT);
-       
+
        BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
 
        if (!ret)