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Merge pull request #109530 from bruvzg/svg_alloc

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[TVG] Use heap for XML parser allocs.
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Thaddeus Crews 2025-08-13 18:42:10 -05:00
commit eeb6ac01e8
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3 changed files with 58 additions and 3 deletions
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1
thirdparty/README.md vendored
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@ -1042,6 +1042,7 @@ Files extracted from upstream source:
Patches:
- `0001-revert-tvglines-bezier-precision.patch` (GH-96658)
- `0002-use-heap-alloc.patch` (GH-109530)
## tinyexr

44
thirdparty/thorvg/patches/0002-use-heap-alloc.patch vendored Normal file
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@ -0,0 +1,44 @@
diff --git a/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp b/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
index 81d5c098a2..4c0a0f53db 100644
--- a/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
+++ b/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
@@ -475,11 +475,14 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
if (!buf) return false;
end = buf + bufLength;
- key = (char*)alloca(end - buf + 1);
- val = (char*)alloca(end - buf + 1);
if (buf == end) return true;
+ char* key_buf = (char*)malloc(end - buf + 1);
+ char* val_buf = (char*)malloc(end - buf + 1);
+
+ key = key_buf;
+ val = val_buf;
do {
char* sep = (char*)strchr(buf, ':');
next = (char*)strchr(buf, ';');
@@ -487,7 +490,11 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
if (auto src = strstr(buf, "src")) {//src tag from css font-face contains extra semicolon
if (src < sep) {
if (next + 1 < end) next = (char*)strchr(next + 1, ';');
- else return true;
+ else {
+ free(key_buf);
+ free(val_buf);
+ return true;
+ }
}
}
@@ -534,6 +541,9 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
buf = next + 1;
} while (true);
+ free(key_buf);
+ free(val_buf);
+
return true;
}

16
thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp vendored
View file

@ -475,11 +475,14 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
if (!buf) return false;
end = buf + bufLength;
key = (char*)alloca(end - buf + 1);
val = (char*)alloca(end - buf + 1);
if (buf == end) return true;
char* key_buf = (char*)malloc(end - buf + 1);
char* val_buf = (char*)malloc(end - buf + 1);
key = key_buf;
val = val_buf;
do {
char* sep = (char*)strchr(buf, ':');
next = (char*)strchr(buf, ';');
@ -487,7 +490,11 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
if (auto src = strstr(buf, "src")) {//src tag from css font-face contains extra semicolon
if (src < sep) {
if (next + 1 < end) next = (char*)strchr(next + 1, ';');
else return true;
else {
free(key_buf);
free(val_buf);
return true;
}
}
}
@ -534,6 +541,9 @@ bool simpleXmlParseW3CAttribute(const char* buf, unsigned bufLength, simpleXMLAt
buf = next + 1;
} while (true);
free(key_buf);
free(val_buf);
return true;
}