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Fix memory leak in giflib

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This commit is contained in:
Eli Kobrin 2023-11-08 11:42:18 +03:00
parent 1faa5856a0
commit 66c40ffc52
1 changed files with 7 additions and 4 deletions
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11
third_party/gif_fix_image_counter.patch vendored
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@ -1,5 +1,5 @@
diff --git a/dgif_lib.c b/dgif_lib.c
index 82fc097..c6700a9 100644
index 82fc097..214a0e7 100644
--- a/dgif_lib.c
+++ b/dgif_lib.c
@@ -810,7 +810,8 @@ DGifSetupDecompress(GifFileType *GifFile)
@ -12,7 +12,7 @@ index 82fc097..c6700a9 100644
}
BitsPerPixel = CodeSize;
@@ -1118,6 +1119,28 @@ DGifBufferedInput(GifFileType *GifFile, GifByteType *Buf, GifByteType *NextByte)
@@ -1118,6 +1119,31 @@ DGifBufferedInput(GifFileType *GifFile, GifByteType *Buf, GifByteType *NextByte)
return GIF_OK;
}
@ -29,6 +29,9 @@ index 82fc097..c6700a9 100644
+ if (GifFile->SavedImages[GifFile->ImageCount].RasterBits != NULL) {
+ free(GifFile->SavedImages[GifFile->ImageCount].RasterBits);
+ }
+ if (GifFile->SavedImages[GifFile->ImageCount].ImageDesc.ColorMap != NULL) {
+ GifFreeMapObject(GifFile->SavedImages[GifFile->ImageCount].ImageDesc.ColorMap);
+ }
+
+ // Realloc array according to the new image counter.
+ SavedImage *correct_saved_images = (SavedImage *)reallocarray(
@ -41,7 +44,7 @@ index 82fc097..c6700a9 100644
/******************************************************************************
This routine reads an entire GIF into core, hanging all its state info off
the GifFileType pointer. Call DGifOpenFileName() or DGifOpenFileHandle()
@@ -1148,17 +1171,20 @@ DGifSlurp(GifFileType *GifFile)
@@ -1148,17 +1174,20 @@ DGifSlurp(GifFileType *GifFile)
/* Allocate memory for the image */
if (sp->ImageDesc.Width <= 0 || sp->ImageDesc.Height <= 0 ||
sp->ImageDesc.Width > (INT_MAX / sp->ImageDesc.Height)) {
@ -62,7 +65,7 @@ index 82fc097..c6700a9 100644
return GIF_ERROR;
}
@@ -1177,13 +1203,17 @@ DGifSlurp(GifFileType *GifFile)
@@ -1177,13 +1206,17 @@ DGifSlurp(GifFileType *GifFile)
j += InterlacedJumps[i]) {
if (DGifGetLine(GifFile,
sp->RasterBits+j*sp->ImageDesc.Width,