giflib/CVE-2021-40633.patch

diff -urN giflib-5.2.2/gif2rgb.c giflib-5.2.2-bak/gif2rgb.c
--- giflib-5.2.2/gif2rgb.c	2024-05-14 16:06:40.098092160 +0800
+++ giflib-5.2.2-bak/gif2rgb.c	2024-05-14 15:53:42.426757251 +0800
@@ -525,6 +525,9 @@
 	DumpScreen2RGB(OutFileName, OneFileFlag, ColorMap, ScreenBuffer,
 	               GifFile->SWidth, GifFile->SHeight);
 
+	for (i = 0; i < GifFile->SHeight; i++) {
+		(void)free(ScreenBuffer[i]);
+	}
 	(void)free(ScreenBuffer);
 
 	{