diff --git a/btif/src/bluetooth.cc b/btif/src/bluetooth.cc
index a72f787f54..e684c1235d 100644
--- a/btif/src/bluetooth.cc
+++ b/btif/src/bluetooth.cc
@@ -359,11 +359,14 @@ static int get_connection_state(const RawAddress* bd_addr) {
 
 static int pin_reply(const RawAddress* bd_addr, uint8_t accept, uint8_t pin_len,
                      bt_pin_code_t* pin_code) {
+  bt_pin_code_t tmp_pin_code;
+  /* sanity check */
   if (!interface_ready()) return BT_STATUS_NOT_READY;
   if (pin_code == nullptr || pin_len > PIN_CODE_LEN) return BT_STATUS_FAIL;
 
+  memcpy(&tmp_pin_code, pin_code, pin_len);
   do_in_main_thread(FROM_HERE, base::BindOnce(btif_dm_pin_reply, *bd_addr,
-                                              accept, pin_len, *pin_code));
+                                              accept, pin_len, tmp_pin_code));
   return BT_STATUS_SUCCESS;
 }
 
diff --git a/stack/avct/avct_lcb_act.cc b/stack/avct/avct_lcb_act.cc
index 9e32ee4e9a..1b4197861d 100644
--- a/stack/avct/avct_lcb_act.cc
+++ b/stack/avct/avct_lcb_act.cc
@@ -67,7 +67,12 @@ static BT_HDR* avct_lcb_msg_asmbl(tAVCT_LCB* p_lcb, BT_HDR* p_buf) {
   pkt_type = AVCT_PKT_TYPE(p);
 
   /* quick sanity check on length */
-  if (p_buf->len < avct_lcb_pkt_type_len[pkt_type]) {
+  if (p_buf->len < avct_lcb_pkt_type_len[pkt_type] ||
+      (sizeof(BT_HDR) + p_buf->offset + p_buf->len) > BT_DEFAULT_BUFFER_SIZE) {
+    if ((sizeof(BT_HDR) + p_buf->offset + p_buf->len) >
+        BT_DEFAULT_BUFFER_SIZE) {
+      android_errorWriteWithInfoLog(0x534e4554, "230867224", -1, NULL, 0);
+    }
     osi_free(p_buf);
     AVCT_TRACE_WARNING("Bad length during reassembly");
     p_ret = NULL;
@@ -88,13 +93,19 @@ static BT_HDR* avct_lcb_msg_asmbl(tAVCT_LCB* p_lcb, BT_HDR* p_buf) {
     if (p_lcb->p_rx_msg != NULL)
       AVCT_TRACE_WARNING("Got start during reassembly");
 
-    osi_free(p_lcb->p_rx_msg);
+    osi_free_and_reset((void**)&p_lcb->p_rx_msg);
 
     /*
      * Allocate bigger buffer for reassembly. As lower layers are
      * not aware of possible packet size after reassembly, they
      * would have allocated smaller buffer.
      */
+    if (sizeof(BT_HDR) + p_buf->offset + p_buf->len > BT_DEFAULT_BUFFER_SIZE) {
+      android_errorWriteLog(0x534e4554, "232023771");
+      osi_free(p_buf);
+      p_ret = NULL;
+      return p_ret;
+    }
     p_lcb->p_rx_msg = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
     memcpy(p_lcb->p_rx_msg, p_buf, sizeof(BT_HDR) + p_buf->offset + p_buf->len);
 
diff --git a/stack/avdt/avdt_msg.cc b/stack/avdt/avdt_msg.cc
index bb49ede3e9..d0c54343c3 100644
--- a/stack/avdt/avdt_msg.cc
+++ b/stack/avdt/avdt_msg.cc
@@ -1250,6 +1250,12 @@ BT_HDR* avdt_msg_asmbl(AvdtpCcb* p_ccb, BT_HDR* p_buf) {
      * not aware of possible packet size after reassembly, they
      * would have allocated smaller buffer.
      */
+    if (sizeof(BT_HDR) + p_buf->offset + p_buf->len > BT_DEFAULT_BUFFER_SIZE) {
+      android_errorWriteLog(0x534e4554, "232023771");
+      osi_free(p_buf);
+      p_ret = NULL;
+      return p_ret;
+    }
     p_ccb->p_rx_msg = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
     memcpy(p_ccb->p_rx_msg, p_buf, sizeof(BT_HDR) + p_buf->offset + p_buf->len);
 
diff --git a/stack/avdt/avdt_scb_act.cc b/stack/avdt/avdt_scb_act.cc
index fdf5570abd..fcb082bc19 100644
--- a/stack/avdt/avdt_scb_act.cc
+++ b/stack/avdt/avdt_scb_act.cc
@@ -310,7 +310,7 @@ uint8_t* avdt_scb_hdl_report(AvdtpScb* p_scb, uint8_t* p, uint16_t len) {
   uint8_t* p_start = p;
   uint32_t ssrc;
   uint8_t o_v, o_p, o_cc;
-  uint16_t min_len = 0;
+  uint32_t min_len = 0;
   AVDT_REPORT_TYPE pt;
   tAVDT_REPORT_DATA report;
 
diff --git a/stack/avrc/avrc_pars_ct.cc b/stack/avrc/avrc_pars_ct.cc
index db3ee75947..2d6f8b2642 100644
--- a/stack/avrc/avrc_pars_ct.cc
+++ b/stack/avrc/avrc_pars_ct.cc
@@ -141,7 +141,7 @@ static tAVRC_STS avrc_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
 
 tAVRC_STS avrc_parse_notification_rsp(uint8_t* p_stream, uint16_t len,
                                       tAVRC_REG_NOTIF_RSP* p_rsp) {
-  uint16_t min_len = 1;
+  uint32_t min_len = 1;
 
   if (len < min_len) goto length_error;
   BE_STREAM_TO_UINT8(p_rsp->event_id, p_stream);
@@ -237,7 +237,7 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
   }
   BE_STREAM_TO_UINT8(pdu, p);
   uint16_t pkt_len;
-  uint16_t min_len = 0;
+  uint32_t min_len = 0;
   /* read the entire packet len */
   BE_STREAM_TO_UINT16(pkt_len, p);
 
@@ -279,7 +279,7 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
           get_item_rsp->uid_counter, get_item_rsp->item_count);
 
       /* get each of the items */
-      get_item_rsp->p_item_list = (tAVRC_ITEM*)osi_malloc(
+      get_item_rsp->p_item_list = (tAVRC_ITEM*)osi_calloc(
           get_item_rsp->item_count * (sizeof(tAVRC_ITEM)));
       tAVRC_ITEM* curr_item = get_item_rsp->p_item_list;
       for (int i = 0; i < get_item_rsp->item_count; i++) {
@@ -369,7 +369,7 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
                              __func__, media->type, media->name.charset_id,
                              media->name.str_len, media->attr_count);
 
-            media->p_attr_list = (tAVRC_ATTR_ENTRY*)osi_malloc(
+            media->p_attr_list = (tAVRC_ATTR_ENTRY*)osi_calloc(
                 media->attr_count * sizeof(tAVRC_ATTR_ENTRY));
             for (int jk = 0; jk < media->attr_count; jk++) {
               tAVRC_ATTR_ENTRY* attr_entry = &(media->p_attr_list[jk]);
@@ -380,14 +380,8 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
               /* Parse the name now */
               BE_STREAM_TO_UINT16(attr_entry->name.charset_id, p);
               BE_STREAM_TO_UINT16(attr_entry->name.str_len, p);
-              if (static_cast<uint16_t>(min_len + attr_entry->name.str_len) <
-                  min_len) {
-                // Check for overflow
-                android_errorWriteLog(0x534e4554, "205570663");
-              }
-              if (pkt_len - min_len < attr_entry->name.str_len)
-                goto browse_length_error;
               min_len += attr_entry->name.str_len;
+              if (pkt_len < min_len) goto browse_length_error;
               attr_entry->name.p_str = (uint8_t*)osi_malloc(
                   attr_entry->name.str_len * sizeof(uint8_t));
               BE_STREAM_TO_ARRAY(p, attr_entry->name.p_str,
@@ -441,7 +435,7 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
       }
       BE_STREAM_TO_UINT8(get_attr_rsp->status, p)
       BE_STREAM_TO_UINT8(get_attr_rsp->num_attrs, p);
-      get_attr_rsp->p_attrs = (tAVRC_ATTR_ENTRY*)osi_malloc(
+      get_attr_rsp->p_attrs = (tAVRC_ATTR_ENTRY*)osi_calloc(
           get_attr_rsp->num_attrs * sizeof(tAVRC_ATTR_ENTRY));
       for (int i = 0; i < get_attr_rsp->num_attrs; i++) {
         tAVRC_ATTR_ENTRY* attr_entry = &(get_attr_rsp->p_attrs[i]);
@@ -450,14 +444,8 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
         BE_STREAM_TO_UINT32(attr_entry->attr_id, p);
         BE_STREAM_TO_UINT16(attr_entry->name.charset_id, p);
         BE_STREAM_TO_UINT16(attr_entry->name.str_len, p);
-        if (static_cast<uint16_t>(min_len + attr_entry->name.str_len) <
-            min_len) {
-          // Check for overflow
-          android_errorWriteLog(0x534e4554, "205570663");
-        }
-        if (pkt_len - min_len < attr_entry->name.str_len)
-          goto browse_length_error;
         min_len += attr_entry->name.str_len;
+        if (pkt_len < min_len) goto browse_length_error;
         attr_entry->name.p_str =
             (uint8_t*)osi_malloc(attr_entry->name.str_len * sizeof(uint8_t));
         BE_STREAM_TO_ARRAY(p, attr_entry->name.p_str, attr_entry->name.str_len);
@@ -493,7 +481,7 @@ static tAVRC_STS avrc_pars_browse_rsp(tAVRC_MSG_BROWSE* p_msg,
           __func__, set_br_pl_rsp->status, set_br_pl_rsp->num_items,
           set_br_pl_rsp->charset_id, set_br_pl_rsp->folder_depth);
 
-      set_br_pl_rsp->p_folders = (tAVRC_NAME*)osi_malloc(
+      set_br_pl_rsp->p_folders = (tAVRC_NAME*)osi_calloc(
           set_br_pl_rsp->folder_depth * sizeof(tAVRC_NAME));
 
       /* Read each of the folder in the depth */
@@ -553,7 +541,7 @@ static tAVRC_STS avrc_ctrl_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
   p++; /* skip the reserved/packe_type byte */
 
   uint16_t len;
-  uint16_t min_len = 0;
+  uint32_t min_len = 0;
   BE_STREAM_TO_UINT16(len, p);
   AVRC_TRACE_DEBUG("%s ctype:0x%x pdu:0x%x, len:%d  vendor_len=0x%x", __func__,
                    p_msg->hdr.ctype, p_result->pdu, len, p_msg->vendor_len);
@@ -827,12 +815,8 @@ static tAVRC_STS avrc_ctrl_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
           BE_STREAM_TO_UINT32(p_attrs[i].attr_id, p);
           BE_STREAM_TO_UINT16(p_attrs[i].name.charset_id, p);
           BE_STREAM_TO_UINT16(p_attrs[i].name.str_len, p);
-          if (static_cast<uint16_t>(min_len + p_attrs[i].name.str_len) <
-              min_len) {
-            // Check for overflow
-            android_errorWriteLog(0x534e4554, "205570663");
-          }
-          if (len - min_len < p_attrs[i].name.str_len) {
+          min_len += p_attrs[i].name.str_len;
+          if (len < min_len) {
             for (int j = 0; j < i; j++) {
               osi_free(p_attrs[j].name.p_str);
             }
@@ -840,7 +824,6 @@ static tAVRC_STS avrc_ctrl_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
             p_result->get_attrs.num_attrs = 0;
             goto length_error;
           }
-          min_len += p_attrs[i].name.str_len;
           if (p_attrs[i].name.str_len > 0) {
             p_attrs[i].name.p_str =
                 (uint8_t*)osi_calloc(p_attrs[i].name.str_len);
diff --git a/stack/avrc/avrc_pars_tg.cc b/stack/avrc/avrc_pars_tg.cc
index 8d239b21e1..fdd1c06cb3 100644
--- a/stack/avrc/avrc_pars_tg.cc
+++ b/stack/avrc/avrc_pars_tg.cc
@@ -437,7 +437,7 @@ static tAVRC_STS avrc_pars_browsing_cmd(tAVRC_MSG_BROWSE* p_msg,
   uint8_t* p = p_msg->p_browse_data;
   int count;
 
-  uint16_t min_len = 3;
+  uint32_t min_len = 3;
   RETURN_STATUS_IF_FALSE(AVRC_STS_BAD_CMD, (p_msg->browse_len >= min_len),
                          "msg too short");
 
diff --git a/stack/bnep/bnep_api.cc b/stack/bnep/bnep_api.cc
index 455dc168d6..0996370897 100644
--- a/stack/bnep/bnep_api.cc
+++ b/stack/bnep/bnep_api.cc
@@ -256,6 +256,7 @@ tBNEP_RESULT BNEP_ConnectResp(uint16_t handle, tBNEP_RESULT resp) {
     p = (uint8_t*)(p_bcb->p_pending_data + 1) + p_bcb->p_pending_data->offset;
     while (extension_present && p && rem_len) {
       ext_type = *p++;
+      rem_len--;
       extension_present = ext_type >> 7;
       ext_type &= 0x7F;
 
diff --git a/stack/sdp/sdp_discovery.cc b/stack/sdp/sdp_discovery.cc
index e6075407e0..fc53fc7408 100644
--- a/stack/sdp/sdp_discovery.cc
+++ b/stack/sdp/sdp_discovery.cc
@@ -282,7 +282,7 @@ static void process_service_search_rsp(tCONN_CB* p_ccb, uint8_t* p_reply,
 
   orig = p_ccb->num_handles;
   p_ccb->num_handles += cur_handles;
-  if (p_ccb->num_handles == 0) {
+  if (p_ccb->num_handles == 0 || p_ccb->num_handles < orig) {
     SDP_TRACE_WARNING("SDP - Rcvd ServiceSearchRsp, no matches");
     sdp_disconnect(p_ccb, SDP_NO_RECS_MATCH);
     return;