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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 diff --git a/dgif_lib.c b/dgif_lib.c
index 82fc097..c6700a9 100644 index 82fc097..214a0e7 100644
--- a/dgif_lib.c --- a/dgif_lib.c
+++ b/dgif_lib.c +++ b/dgif_lib.c
@@ -810,7 +810,8 @@ DGifSetupDecompress(GifFileType *GifFile) @@ -810,7 +810,8 @@ DGifSetupDecompress(GifFileType *GifFile)
@ -12,7 +12,7 @@ index 82fc097..c6700a9 100644
} }
BitsPerPixel = CodeSize; 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; return GIF_OK;
} }
@ -29,6 +29,9 @@ index 82fc097..c6700a9 100644
+ if (GifFile->SavedImages[GifFile->ImageCount].RasterBits != NULL) { + if (GifFile->SavedImages[GifFile->ImageCount].RasterBits != NULL) {
+ free(GifFile->SavedImages[GifFile->ImageCount].RasterBits); + 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. + // Realloc array according to the new image counter.
+ SavedImage *correct_saved_images = (SavedImage *)reallocarray( + 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 This routine reads an entire GIF into core, hanging all its state info off
the GifFileType pointer. Call DGifOpenFileName() or DGifOpenFileHandle() 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 */ /* Allocate memory for the image */
if (sp->ImageDesc.Width <= 0 || sp->ImageDesc.Height <= 0 || if (sp->ImageDesc.Width <= 0 || sp->ImageDesc.Height <= 0 ||
sp->ImageDesc.Width > (INT_MAX / sp->ImageDesc.Height)) { sp->ImageDesc.Width > (INT_MAX / sp->ImageDesc.Height)) {
@ -62,7 +65,7 @@ index 82fc097..c6700a9 100644
return GIF_ERROR; return GIF_ERROR;
} }
@@ -1177,13 +1203,17 @@ DGifSlurp(GifFileType *GifFile) @@ -1177,13 +1206,17 @@ DGifSlurp(GifFileType *GifFile)
j += InterlacedJumps[i]) { j += InterlacedJumps[i]) {
if (DGifGetLine(GifFile, if (DGifGetLine(GifFile,
sp->RasterBits+j*sp->ImageDesc.Width, sp->RasterBits+j*sp->ImageDesc.Width,