Merge branch 'dev/11/fp3/security-aosp-rvc-release' into int/11/fp3
* dev/11/fp3/security-aosp-rvc-release:
Revert "Revert "Fix wrong BR/EDR link key downgrades (P_256->P_192)""
Revert "Revert "[RESTRICT AUTOMERGE] Validate buffer length in sdpu_build_uuid_seq""
Prevent use-after-free of HID reports
Change-Id: I645864626a54a34766274f65c621c422c07e65e7
diff --git a/btif/src/btif_hh.cc b/btif/src/btif_hh.cc
index 5380fa5..97479e0 100644
--- a/btif/src/btif_hh.cc
+++ b/btif/src/btif_hh.cc
@@ -1095,6 +1095,38 @@
/*******************************************************************************
*
+ * Function btif_hh_hsdata_rpt_copy_cb
+ *
+ * Description Deep copies the tBTA_HH_HSDATA structure
+ *
+ * Returns void
+ *
+ ******************************************************************************/
+
+static void btif_hh_hsdata_rpt_copy_cb(uint16_t event, char* p_dest,
+ char* p_src) {
+ tBTA_HH_HSDATA* p_dst_data = (tBTA_HH_HSDATA*)p_dest;
+ tBTA_HH_HSDATA* p_src_data = (tBTA_HH_HSDATA*)p_src;
+ BT_HDR* hdr;
+
+ if (!p_src) {
+ BTIF_TRACE_ERROR("%s: Nothing to copy", __func__);
+ return;
+ }
+
+ memcpy(p_dst_data, p_src_data, sizeof(tBTA_HH_HSDATA));
+
+ hdr = p_src_data->rsp_data.p_rpt_data;
+ if (hdr != NULL) {
+ uint8_t* p_data = ((uint8_t*)p_dst_data) + sizeof(tBTA_HH_HSDATA);
+ memcpy(p_data, hdr, BT_HDR_SIZE + hdr->offset + hdr->len);
+
+ p_dst_data->rsp_data.p_rpt_data = (BT_HDR*)p_data;
+ }
+}
+
+/*******************************************************************************
+ *
* Function bte_hh_evt
*
* Description Switches context from BTE to BTIF for all HH events
@@ -1106,6 +1138,7 @@
void bte_hh_evt(tBTA_HH_EVT event, tBTA_HH* p_data) {
bt_status_t status;
int param_len = 0;
+ tBTIF_COPY_CBACK* p_copy_cback = NULL;
if (BTA_HH_ENABLE_EVT == event)
param_len = sizeof(tBTA_HH_STATUS);
@@ -1117,11 +1150,18 @@
param_len = sizeof(tBTA_HH_CBDATA);
else if (BTA_HH_GET_DSCP_EVT == event)
param_len = sizeof(tBTA_HH_DEV_DSCP_INFO);
- else if ((BTA_HH_GET_PROTO_EVT == event) || (BTA_HH_GET_RPT_EVT == event) ||
- (BTA_HH_GET_IDLE_EVT == event))
+ else if ((BTA_HH_GET_PROTO_EVT == event) || (BTA_HH_GET_IDLE_EVT == event))
param_len = sizeof(tBTA_HH_HSDATA);
- else if ((BTA_HH_SET_PROTO_EVT == event) || (BTA_HH_SET_RPT_EVT == event) ||
- (BTA_HH_VC_UNPLUG_EVT == event) || (BTA_HH_SET_IDLE_EVT == event))
+ else if (BTA_HH_GET_RPT_EVT == event) {
+ BT_HDR* hdr = p_data->hs_data.rsp_data.p_rpt_data;
+ param_len = sizeof(tBTA_HH_HSDATA);
+
+ if (hdr != NULL) {
+ p_copy_cback = btif_hh_hsdata_rpt_copy_cb;
+ param_len += BT_HDR_SIZE + hdr->offset + hdr->len;
+ }
+ } else if ((BTA_HH_SET_PROTO_EVT == event) || (BTA_HH_SET_RPT_EVT == event) ||
+ (BTA_HH_VC_UNPLUG_EVT == event) || (BTA_HH_SET_IDLE_EVT == event))
param_len = sizeof(tBTA_HH_CBDATA);
else if ((BTA_HH_ADD_DEV_EVT == event) || (BTA_HH_RMV_DEV_EVT == event))
param_len = sizeof(tBTA_HH_DEV_INFO);
@@ -1130,7 +1170,7 @@
/* switch context to btif task context (copy full union size for convenience)
*/
status = btif_transfer_context(btif_hh_upstreams_evt, (uint16_t)event,
- (char*)p_data, param_len, NULL);
+ (char*)p_data, param_len, p_copy_cback);
/* catch any failed context transfers */
ASSERTC(status == BT_STATUS_SUCCESS, "context transfer failed", status);
diff --git a/stack/btm/btm_sec.cc b/stack/btm/btm_sec.cc
index eecbed5..ec120f6 100644
--- a/stack/btm/btm_sec.cc
+++ b/stack/btm/btm_sec.cc
@@ -3826,22 +3826,6 @@
SMP_BR_PairWith(p_dev_rec->bd_addr);
}
}
- } else {
- // BR/EDR is successfully encrypted. Correct LK type if needed
- // (BR/EDR LK derived from LE LTK was used for encryption)
- if ((encr_enable == 1) && /* encryption is ON for SSP */
- /* LK type is for BR/EDR SC */
- (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256 ||
- p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
- if (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256)
- p_dev_rec->link_key_type = BTM_LKEY_TYPE_UNAUTH_COMB;
- else /* BTM_LKEY_TYPE_AUTH_COMB_P_256 */
- p_dev_rec->link_key_type = BTM_LKEY_TYPE_AUTH_COMB;
-
- BTM_TRACE_DEBUG("updated link key type to %d",
- p_dev_rec->link_key_type);
- btm_send_link_key_notif(p_dev_rec);
- }
}
}
diff --git a/stack/sdp/sdp_discovery.cc b/stack/sdp/sdp_discovery.cc
index f5938e4..553e068 100644
--- a/stack/sdp/sdp_discovery.cc
+++ b/stack/sdp/sdp_discovery.cc
@@ -70,10 +70,15 @@
*
******************************************************************************/
static uint8_t* sdpu_build_uuid_seq(uint8_t* p_out, uint16_t num_uuids,
- Uuid* p_uuid_list) {
+ Uuid* p_uuid_list, uint16_t& bytes_left) {
uint16_t xx;
uint8_t* p_len;
+ if (bytes_left < 2) {
+ DCHECK(0) << "SDP: No space for data element header";
+ return (p_out);
+ }
+
/* First thing is the data element header */
UINT8_TO_BE_STREAM(p_out, (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_BYTE);
@@ -81,9 +86,20 @@
p_len = p_out;
p_out += 1;
+ /* Account for data element header and length */
+ bytes_left -= 2;
+
/* Now, loop through and put in all the UUID(s) */
for (xx = 0; xx < num_uuids; xx++, p_uuid_list++) {
int len = p_uuid_list->GetShortestRepresentationSize();
+
+ if (len + 1 > bytes_left) {
+ DCHECK(0) << "SDP: Too many UUIDs for internal buffer";
+ break;
+ } else {
+ bytes_left -= (len + 1);
+ }
+
if (len == Uuid::kNumBytes16) {
UINT8_TO_BE_STREAM(p_out, (UUID_DESC_TYPE << 3) | SIZE_TWO_BYTES);
UINT16_TO_BE_STREAM(p_out, p_uuid_list->As16Bit());
@@ -120,6 +136,7 @@
uint8_t *p, *p_start, *p_param_len;
BT_HDR* p_cmd = (BT_HDR*)osi_malloc(SDP_DATA_BUF_SIZE);
uint16_t param_len;
+ uint16_t bytes_left = SDP_DATA_BUF_SIZE;
/* Prepare the buffer for sending the packet to L2CAP */
p_cmd->offset = L2CAP_MIN_OFFSET;
@@ -134,13 +151,30 @@
p_param_len = p;
p += 2;
-/* Build the UID sequence. */
+ /* Account for header size, max service record count and
+ * continuation state */
+ const uint16_t base_bytes = (sizeof(BT_HDR) + L2CAP_MIN_OFFSET +
+ 3u + /* service search request header */
+ 2u + /* param len */
+ 3u + ((p_cont) ? cont_len : 0));
+
+ if (base_bytes > bytes_left) {
+ DCHECK(0) << "SDP: Overran SDP data buffer";
+ osi_free(p_cmd);
+ return;
+ }
+
+ bytes_left -= base_bytes;
+
+ /* Build the UID sequence. */
#if (SDP_BROWSE_PLUS == TRUE)
p = sdpu_build_uuid_seq(p, 1,
- &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx]);
+ &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx],
+ bytes_left);
#else
+ /* Build the UID sequence. */
p = sdpu_build_uuid_seq(p, p_ccb->p_db->num_uuid_filters,
- p_ccb->p_db->uuid_filters);
+ p_ccb->p_db->uuid_filters, bytes_left);
#endif
/* Set max service record count */
@@ -575,6 +609,7 @@
if ((cont_request_needed) || (!p_reply)) {
BT_HDR* p_msg = (BT_HDR*)osi_malloc(SDP_DATA_BUF_SIZE);
uint8_t* p;
+ uint16_t bytes_left = SDP_DATA_BUF_SIZE;
p_msg->offset = L2CAP_MIN_OFFSET;
p = p_start = (uint8_t*)(p_msg + 1) + L2CAP_MIN_OFFSET;
@@ -588,13 +623,29 @@
p_param_len = p;
p += 2;
-/* Build the UID sequence. */
+ /* Account for header size, max service record count and
+ * continuation state */
+ const uint16_t base_bytes = (sizeof(BT_HDR) + L2CAP_MIN_OFFSET +
+ 3u + /* service search request header */
+ 2u + /* param len */
+ 3u + /* max service record count */
+ ((p_reply) ? (*p_reply) : 0));
+
+ if (base_bytes > bytes_left) {
+ sdp_disconnect(p_ccb, SDP_INVALID_CONT_STATE);
+ return;
+ }
+
+ bytes_left -= base_bytes;
+
+ /* Build the UID sequence. */
#if (SDP_BROWSE_PLUS == TRUE)
p = sdpu_build_uuid_seq(p, 1,
- &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx]);
+ &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx],
+ bytes_left);
#else
p = sdpu_build_uuid_seq(p, p_ccb->p_db->num_uuid_filters,
- p_ccb->p_db->uuid_filters);
+ p_ccb->p_db->uuid_filters, bytes_left);
#endif
/* Max attribute byte count */