rockchip: aiq: fix potential crash on mGroupMsgMap.erase()

Signed-off-by: hmz007 <hmz007@gmail.com>

external/camera_engine_rkaiq/aiq_core/RkAiqAnalyzeGroupManager.cpp

@@ -134,6 +134,8 @@ bool RkAiqAnalyzerGroup::msgHandle(RkAiqCoreVdBufMsg* msg) {
     if (msg->frame_id == mAwakenId)
         delayCnt = 0;
     uint32_t userId = msg->frame_id + delayCnt;
+
+    std::unique_lock<std::mutex> lock(mGroupMsgMapLock);
     GroupMessage& msgWrapper = mGroupMsgMap[userId];
 
     msgWrapper.msg_flags |= 1ULL << msg->msg_id;
@@ -161,26 +163,32 @@ bool RkAiqAnalyzerGroup::msgHandle(RkAiqCoreVdBufMsg* msg) {
          MessageType2Str[msg->msg_id], delayCnt, mGroupMsgMap.size());
 
     uint64_t msg_flags = msgWrapper.msg_flags;
-    if (!(msg_flags ^ mDepsFlag)) {
-        std::array<RkAiqCoreVdBufMsg, MAX_MESSAGES>& msgList = msgWrapper.msgList;
-        mHandler(msgList, msg_cnts, userId, getType());
+    if (msg_flags ^ mDepsFlag) {
+        msgReduction(mGroupMsgMap);
+        return true;
+    }
+
+    // copy msgList and msg_cnts for mHandler()
+    std::array<RkAiqCoreVdBufMsg, MAX_MESSAGES> msgList = msgWrapper.msgList;
+    int msgCount = msgWrapper.msg_cnts;
+
 #if 0
-        for (auto it = mGroupMsgMap.begin(); it != mGroupMsgMap.end();) {
-            if ((*it).first <= userId) {
-                it = mGroupMsgMap.erase(it);
-            } else {
-                break;//it++;
-            }
+    for (auto it = mGroupMsgMap.begin(); it != mGroupMsgMap.end();) {
+        if ((*it).first <= userId) {
+            it = mGroupMsgMap.erase(it);
+        } else {
+            break;//it++;
         }
+    }
 #else
-        std::map<uint32_t, GroupMessage>::iterator itup = mGroupMsgMap.upper_bound(userId);
-        mGroupMsgMap.erase(mGroupMsgMap.begin(), itup);
+    std::map<uint32_t, GroupMessage>::iterator itup = mGroupMsgMap.upper_bound(userId);
+    mGroupMsgMap.erase(mGroupMsgMap.begin(), itup);
 #endif
-        LOGD_ANALYZER("%s, group %s erase frame(%d) msg map\n", __FUNCTION__, AnalyzerGroupType2Str[mGroupType], userId);
-    } else {
-        msgReduction(mGroupMsgMap);
-        return true;
-    }
+
+    lock.unlock();
+    LOGD_ANALYZER("%s, group %s erase frame(%d) msg map\n", __FUNCTION__, AnalyzerGroupType2Str[mGroupType], userId);
+
+    mHandler(msgList, msgCount, userId, getType());
 
     return true;
 }
@@ -190,7 +198,11 @@ XCamReturn RkAiqAnalyzerGroup::stop() {
         mRkAiqGroupMsgHdlTh->triger_stop();
         mRkAiqGroupMsgHdlTh->stop();
     }
-    mGroupMsgMap.clear();
+
+    {
+        std::lock_guard<std::mutex> lock(mGroupMsgMapLock);
+        mGroupMsgMap.clear();
+    }
 
     return XCAM_RETURN_NO_ERROR;
 }
@@ -198,6 +210,7 @@ XCamReturn RkAiqAnalyzerGroup::stop() {
 void RkAiqAnalyzerGroup::setDepsFlagAndClearMap(uint64_t new_deps)
 {
     mDepsFlag = new_deps;
+    std::lock_guard<std::mutex> lock(mGroupMsgMapLock);
     if (mGroupMsgMap.size()) {
         mGroupMsgMap.clear();
     }

external/camera_engine_rkaiq/aiq_core/RkAiqAnalyzeGroupManager.h

@@ -87,6 +87,7 @@ class RkAiqAnalyzerGroup {
     RkAiqGrpConditions_t mGrpConds;
     SmartPtr<RkAiqAnalyzeGroupMsgHdlThread> mRkAiqGroupMsgHdlTh;
     std::map<uint32_t, GroupMessage> mGroupMsgMap;
+    mutable std::mutex mGroupMsgMapLock;
     MessageHandleWrapper mHandler;
     int8_t mUserSetDelayCnts;
     bool mVicapScaleStart{false};