diff --git a/rtengine/lcp.cc b/rtengine/lcp.cc
index a1484cdf6..94be05ac2 100644
--- a/rtengine/lcp.cc
+++ b/rtengine/lcp.cc
@@ -931,7 +931,12 @@ std::shared_ptr<rtengine::LCPProfile> rtengine::LCPStore::getProfile(const Glib:
 
     std::shared_ptr<LCPProfile> res;
     if (!cache.get(filename, res)) {
-        res.reset(new LCPProfile(filename));
+        try {
+            res.reset(new LCPProfile(filename));
+        } catch (...) {
+            return nullptr;
+        }
+
         cache.set(filename, res);
     }
 
diff --git a/rtengine/rawimage.cc b/rtengine/rawimage.cc
index 6ef110a03..47ca7085f 100644
--- a/rtengine/rawimage.cc
+++ b/rtengine/rawimage.cc
@@ -479,13 +479,13 @@ int RawImage::loadRaw (bool loadData, unsigned int imageNum, bool closeFile, Pro
         iwidth  = width;
 
         if (filters || colors == 1) {
-            raw_image = (ushort *) calloc ((raw_height + 7) * raw_width, 2);
+            raw_image = (ushort *) calloc ((static_cast<unsigned int>(raw_height) + 7u) * static_cast<unsigned int>(raw_width), 2);
             merror (raw_image, "main()");
         }
 
         // dcraw needs this global variable to hold pixel data
-        image = (dcrawImage_t)calloc (height * width * sizeof * image + meta_length, 1);
-        meta_data = (char *) (image + height * width);
+        image = (dcrawImage_t)calloc (static_cast<unsigned int>(height) * static_cast<unsigned int>(width) * sizeof * image + meta_length, 1);
+        meta_data = (char *) (image + static_cast<unsigned int>(height) * static_cast<unsigned int>(width));
 
         if(!image) {
             return 200;
@@ -673,7 +673,7 @@ int RawImage::loadRaw (bool loadData, unsigned int imageNum, bool closeFile, Pro
     return 0;
 }
 
-float** RawImage::compress_image(int frameNum, bool freeImage)
+float** RawImage::compress_image(unsigned int frameNum, bool freeImage)
 {
     if( !image ) {
         return nullptr;
@@ -682,7 +682,7 @@ float** RawImage::compress_image(int frameNum, bool freeImage)
     if (isBayer() || isXtrans()) {
         if (!allocation) {
             // shift the beginning of all frames but the first by 32 floats to avoid cache miss conflicts on CPUs which have <= 4-way associative L1-Cache
-            allocation = new float[height * width + frameNum * 32];
+            allocation = new float[static_cast<unsigned int>(height) * static_cast<unsigned int>(width) + frameNum * 32u];
             data = new float*[height];
 
             for (int i = 0; i < height; i++) {
diff --git a/rtengine/rawimage.h b/rtengine/rawimage.h
index 7595ad196..7017f4c1b 100644
--- a/rtengine/rawimage.h
+++ b/rtengine/rawimage.h
@@ -121,7 +121,7 @@ public:
     {
         return image;
     }
-    float** compress_image(int frameNum, bool freeImage = true); // revert to compressed pixels format and release image data
+    float** compress_image(unsigned int frameNum, bool freeImage = true); // revert to compressed pixels format and release image data
     float** data;             // holds pixel values, data[i][j] corresponds to the ith row and jth column
     unsigned prefilters;               // original filters saved ( used for 4 color processing )
     unsigned int getFrameCount() const { return is_raw; }
diff --git a/rtexif/rtexif.cc b/rtexif/rtexif.cc
index c35ba7e0b..947795c20 100644
--- a/rtexif/rtexif.cc
+++ b/rtexif/rtexif.cc
@@ -976,16 +976,19 @@ Tag::Tag (TagDirectory* p, FILE* f, int base)
 
     if (tag == 0x002e) { // location of the embedded preview image in raw files of Panasonic cameras
         ExifManager eManager(f, nullptr, true);
-        eManager.parseJPEG(ftell(f)); // try to parse the exif data from the preview image
+        const auto fpos = ftell(f);
+        if (fpos >= 0) {
+            eManager.parseJPEG(fpos); // try to parse the exif data from the preview image
 
-        if (eManager.roots.size()) {
-            const TagDirectory* const previewdir = eManager.roots.at(0);
-            if (previewdir->getTag ("Exif")) {
-                if (previewdir->getTag ("Make")) {
-                    if (previewdir->getTag ("Make")->valueToString() == "Panasonic") { // "make" is not yet available here, so get it from the preview tags to assure we're doing the right thing
-                        Tag* t = new Tag (parent->getRoot(), lookupAttrib (ifdAttribs, "Exif")); // replace raw exif with preview exif assuming there are the same
-                        t->initSubDir (previewdir->getTag ("Exif")->getDirectory());
-                        parent->getRoot()->addTag (t);
+            if (eManager.roots.size()) {
+                const TagDirectory* const previewdir = eManager.roots.at(0);
+                if (previewdir->getTag ("Exif")) {
+                    if (previewdir->getTag ("Make")) {
+                        if (previewdir->getTag ("Make")->valueToString() == "Panasonic") { // "make" is not yet available here, so get it from the preview tags to assure we're doing the right thing
+                            Tag* t = new Tag (parent->getRoot(), lookupAttrib (ifdAttribs, "Exif")); // replace raw exif with preview exif assuming there are the same
+                            t->initSubDir (previewdir->getTag ("Exif")->getDirectory());
+                            parent->getRoot()->addTag (t);
+                        }
                     }
                 }
             }
@@ -2474,7 +2477,7 @@ parse_leafdata (TagDirectory* root, ByteOrder order)
         char *val = (char *)&value[pos];
 
         if (strncmp (&hdr[8], "CameraObj_ISO_speed", 19) == 0) {
-            iso_speed = 25 * (1 << (atoi (val) - 1));
+            iso_speed = 25 * (1 << std::max((atoi (val) - 1), 0));
             found_count++;
         } else if (strncmp (&hdr[8], "ImgProf_rotation_angle", 22) == 0) {
             rotation_angle = atoi (val);