diff --git a/3rdparty/libmobi/src/compression.c b/3rdparty/libmobi/src/compression.c
index 440f8da44..3eb0cc6fa 100644
--- a/3rdparty/libmobi/src/compression.c
+++ b/3rdparty/libmobi/src/compression.c
@@ -145,7 +145,10 @@ static MOBI_RET mobi_decompress_huffman_internal(MOBIBuffer *buf_out, MOBIBuffer
         if (!(t1 & 0x80)) {
             /* get offset from mincode, maxcode tables */
             while (code < huffcdic->mincode_table[code_length]) {
-                code_length++;
+                if (++code_length >= HUFF_CODETABLE_SIZE) {
+                    debug_print("Wrong offset to mincode table: %hhu\n", code_length);
+                    return MOBI_DATA_CORRUPT;
+                }
             }
             maxcode = huffcdic->maxcode_table[code_length];
         }
diff --git a/3rdparty/libmobi/src/compression.h b/3rdparty/libmobi/src/compression.h
index e18b3c7a7..59e116e02 100644
--- a/3rdparty/libmobi/src/compression.h
+++ b/3rdparty/libmobi/src/compression.h
@@ -20,6 +20,7 @@
 
 /* FIXME: what is the reasonable value? */
 #define MOBI_HUFFMAN_MAXDEPTH 20 /**< Maximal recursion level for huffman decompression routine */
+#define HUFF_CODETABLE_SIZE 33 /**< Size of min- and maxcode tables */
 
 
 /**
@@ -30,8 +31,8 @@ typedef struct {
     size_t index_read; /**< Number of indices parsed, used by parser */
     size_t code_length; /**< Code length value stored in CDIC record header */
     uint32_t table1[256]; /**< Table of big-endian indices from HUFF record data1 */
-    uint32_t mincode_table[33]; /**< Table of big-endian mincodes from HUFF record data2 */
-    uint32_t maxcode_table[33]; /**< Table of big-endian maxcodes from HUFF record data2 */
+    uint32_t mincode_table[HUFF_CODETABLE_SIZE]; /**< Table of big-endian mincodes from HUFF record data2 */
+    uint32_t maxcode_table[HUFF_CODETABLE_SIZE]; /**< Table of big-endian maxcodes from HUFF record data2 */
     uint16_t *symbol_offsets; /**< Index of symbol offsets parsed from CDIC records (index_count entries) */
     unsigned char **symbols; /**< Array of pointers to start of symbols data in each CDIC record (index = number of CDIC record) */
 } MOBIHuffCdic;
diff --git a/3rdparty/libmobi/src/read.c b/3rdparty/libmobi/src/read.c
index 4e4677aad..4873f9e1a 100644
--- a/3rdparty/libmobi/src/read.c
+++ b/3rdparty/libmobi/src/read.c
@@ -571,7 +571,7 @@ MOBI_RET mobi_parse_huff(MOBIHuffCdic *huffcdic, const MOBIPdbRecord *record) {
     /* read 32 mincode-maxcode pairs from data2 big-endian */
     huffcdic->mincode_table[0] = 0;
     huffcdic->maxcode_table[0] = 0xFFFFFFFF;
-    for (int i = 1; i < 33; i++) {
+    for (int i = 1; i < HUFF_CODETABLE_SIZE; i++) {
         const uint32_t mincode = buffer_get32(buf);
         const uint32_t maxcode = buffer_get32(buf);
         huffcdic->mincode_table[i] =  mincode << (32 - i);
diff --git a/3rdparty/libxml2/valid.c b/3rdparty/libxml2/valid.c
index 6e53a76de..a6db60dd7 100644
--- a/3rdparty/libxml2/valid.c
+++ b/3rdparty/libxml2/valid.c
@@ -479,6 +479,35 @@ nodeVPop(xmlValidCtxtPtr ctxt)
     return (ret);
 }
 
+/**
+ * xmlValidNormalizeString:
+ * @str: a string
+ *
+ * Normalize a string in-place.
+ */
+static void
+xmlValidNormalizeString(xmlChar *str) {
+    xmlChar *dst;
+    const xmlChar *src;
+
+    if (str == NULL)
+        return;
+    src = str;
+    dst = str;
+
+    while (*src == 0x20) src++;
+    while (*src != 0) {
+	if (*src == 0x20) {
+	    while (*src == 0x20) src++;
+	    if (*src != 0)
+		*dst++ = 0x20;
+	} else {
+	    *dst++ = *src++;
+	}
+    }
+    *dst = 0;
+}
+
 #ifdef DEBUG_VALID_ALGO
 static void
 xmlValidPrintNode(xmlNodePtr cur) {
@@ -2539,6 +2568,24 @@ xmlDumpNotationTable(xmlBufferPtr buf, xmlNotationTablePtr table) {
 	    (xmlDictOwns(dict, (const xmlChar *)(str)) == 0)))	\
 	    xmlFree((char *)(str));
 
+static int
+xmlIsStreaming(xmlValidCtxtPtr ctxt) {
+    xmlParserCtxtPtr pctxt;
+
+    if (ctxt == NULL)
+        return(0);
+    /*
+     * These magic values are also abused to detect whether we're validating
+     * while parsing a document. In this case, userData points to the parser
+     * context.
+     */
+    if ((ctxt->finishDtd != XML_CTXT_FINISH_DTD_0) &&
+        (ctxt->finishDtd != XML_CTXT_FINISH_DTD_1))
+        return(0);
+    pctxt = ctxt->userData;
+    return(pctxt->parseMode == XML_PARSE_READER);
+}
+
 /**
  * xmlFreeID:
  * @not:  A id
@@ -2582,7 +2629,7 @@ xmlAddID(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
     if (doc == NULL) {
 	return(NULL);
     }
-    if (value == NULL) {
+    if ((value == NULL) || (value[0] == 0)) {
 	return(NULL);
     }
     if (attr == NULL) {
@@ -2613,7 +2660,7 @@ xmlAddID(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
      */
     ret->value = xmlStrdup(value);
     ret->doc = doc;
-    if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
+    if (xmlIsStreaming(ctxt)) {
 	/*
 	 * Operating in streaming mode, attr is gonna disapear
 	 */
@@ -2935,7 +2982,7 @@ xmlAddRef(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
      * fill the structure.
      */
     ret->value = xmlStrdup(value);
-    if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
+    if (xmlIsStreaming(ctxt)) {
 	/*
 	 * Operating in streaming mode, attr is gonna disapear
 	 */
@@ -3068,6 +3115,7 @@ xmlRemoveRef(xmlDocPtr doc, xmlAttrPtr attr) {
     ID = xmlNodeListGetString(doc, attr->children, 1);
     if (ID == NULL)
         return(-1);
+	xmlValidNormalizeString(ID);
     ref_list = xmlHashLookup(table, ID);
 
     if(ref_list == NULL) {
@@ -3955,8 +4003,7 @@ xmlValidateAttributeValue2(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 xmlChar *
 xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 	     xmlNodePtr elem, const xmlChar *name, const xmlChar *value) {
-    xmlChar *ret, *dst;
-    const xmlChar *src;
+    xmlChar *ret;
     xmlAttributePtr attrDecl = NULL;
     int extsubset = 0;
 
@@ -3997,19 +4044,7 @@ xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
     ret = xmlStrdup(value);
     if (ret == NULL)
 	return(NULL);
-    src = value;
-    dst = ret;
-    while (*src == 0x20) src++;
-    while (*src != 0) {
-	if (*src == 0x20) {
-	    while (*src == 0x20) src++;
-	    if (*src != 0)
-		*dst++ = 0x20;
-	} else {
-	    *dst++ = *src++;
-	}
-    }
-    *dst = 0;
+    xmlValidNormalizeString(ret);
     if ((doc->standalone) && (extsubset == 1) && (!xmlStrEqual(value, ret))) {
 	xmlErrValidNode(ctxt, elem, XML_DTD_NOT_STANDALONE,
 "standalone: %s on %s value had to be normalized based on external subset declaration\n",
@@ -4041,8 +4076,7 @@ xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 xmlChar *
 xmlValidNormalizeAttributeValue(xmlDocPtr doc, xmlNodePtr elem,
 			        const xmlChar *name, const xmlChar *value) {
-    xmlChar *ret, *dst;
-    const xmlChar *src;
+    xmlChar *ret;
     xmlAttributePtr attrDecl = NULL;
 
     if (doc == NULL) return(NULL);
@@ -4072,19 +4106,7 @@ xmlValidNormalizeAttributeValue(xmlDocPtr doc, xmlNodePtr elem,
     ret = xmlStrdup(value);
     if (ret == NULL)
 	return(NULL);
-    src = value;
-    dst = ret;
-    while (*src == 0x20) src++;
-    while (*src != 0) {
-	if (*src == 0x20) {
-	    while (*src == 0x20) src++;
-	    if (*src != 0)
-		*dst++ = 0x20;
-	} else {
-	    *dst++ = *src++;
-	}
-    }
-    *dst = 0;
+    xmlValidNormalizeString(ret);
     return(ret);
 }
 
diff --git a/3rdparty/lua-5.3.3/ldebug.c b/3rdparty/lua-5.3.3/ldebug.c
index 2f8694eae..9f06f7b49 100644
--- a/3rdparty/lua-5.3.3/ldebug.c
+++ b/3rdparty/lua-5.3.3/ldebug.c
@@ -793,8 +793,11 @@ l_noret luaG_runerror(lua_State *L, const char *fmt, ...)
     msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
     va_end(argp);
 
-    if (isLua(ci))  /* if Lua function, add source:line information */
+    if (isLua(ci)){  /* if Lua function, add source:line information */
         luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
+        setobjs2s(L, L->top - 2, L->top - 1);  /* remove 'msg' from the stack */
+        L->top--;
+    }
 
     luaG_errormsg(L);
 }
diff --git a/3rdparty/lua-5.3.3/lvm.c b/3rdparty/lua-5.3.3/lvm.c
index e95a2972c..fc51af60c 100644
--- a/3rdparty/lua-5.3.3/lvm.c
+++ b/3rdparty/lua-5.3.3/lvm.c
@@ -579,8 +579,10 @@ void luaV_concat(lua_State *L, int total)
             for (n = 1; n < total && tostring(L, top - n - 1); n++) {
                 size_t l = vslen(top - n - 1);
 
-                if (l >= (MAX_SIZE / sizeof(char)) - tl)
+                if (l_unlikely(l >= (MAX_SIZE/sizeof(char)) - tl)) {
+                    L->top = top - total;  /* pop strings to avoid wasting stack */
                     luaG_runerror(L, "string length overflow");
+                }
 
                 tl += l;
             }
@@ -598,7 +600,7 @@ void luaV_concat(lua_State *L, int total)
         }
 
         total -= n - 1; /* got 'n' strings to create 1 new */
-        L->top -= n - 1; /* popped 'n' strings and pushed one */
+        L->top = top - (n - 1);  /* popped 'n' strings and pushed one */
     } while (total > 1);  /* repeat until only 1 result left */
 }
 
diff --git a/3rdparty/openssl-OpenSSL_1_0_2i/crypto/x509/x509_cmp.c b/3rdparty/openssl-OpenSSL_1_0_2i/crypto/x509/x509_cmp.c
index 49c71b912..e4aa712a3 100644
--- a/3rdparty/openssl-OpenSSL_1_0_2i/crypto/x509/x509_cmp.c
+++ b/3rdparty/openssl-OpenSSL_1_0_2i/crypto/x509/x509_cmp.c
@@ -87,6 +87,8 @@ unsigned long X509_issuer_and_serial_hash(X509 *a)
 
     EVP_MD_CTX_init(&ctx);
     f = X509_NAME_oneline(a->cert_info->issuer, NULL, 0);
+    if (f == NULL)
+        goto err;
     if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL))
         goto err;
     if (!EVP_DigestUpdate(&ctx, (unsigned char *)f, strlen(f)))
diff --git a/src/dui-examples/DuiLib/Utils/stb_image.c b/src/dui-examples/DuiLib/Utils/stb_image.c
index f7084dce1..547fd3dc5 100644
--- a/src/dui-examples/DuiLib/Utils/stb_image.c
+++ b/src/dui-examples/DuiLib/Utils/stb_image.c
@@ -2928,6 +2928,13 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan)
         if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
     }
 
+    // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
+    // and I've never seen a non-corrupted JPEG file actually use them
+    for (i=0; i < s->img_n; ++i) {
+      if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
+      if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
+    }
+
     // compute interleaved mcu info
     z->img_h_max = h_max;
     z->img_v_max = v_max;