Esme Povirk : windowscodecs: Check for overflow in jpeg_decoder_initialize.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 538ef6a5e00b1aeff5c397cbc6dcc4f4d09fc723
URL:    https://gitlab.winehq.org/wine/wine/-/commit/538ef6a5e00b1aeff5c397cbc6dcc4f...

Author: Esme Povirk 
Date:   Sat Apr 27 16:32:11 2024 +0000

windowscodecs: Check for overflow in jpeg_decoder_initialize.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56590

---

dlls/windowscodecs/libjpeg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dlls/windowscodecs/libjpeg.c b/dlls/windowscodecs/libjpeg.c
index 3d8caac065c..22903ae4340 100644
--- a/dlls/windowscodecs/libjpeg.c
+++ b/dlls/windowscodecs/libjpeg.c
@@ -248,6 +248,10 @@ static HRESULT CDECL jpeg_decoder_initialize(struct decoder* iface, IStream *str
     This->stride = (This->frame.bpp * This->cinfo.output_width + 7) / 8;
     data_size = This->stride * This->cinfo.output_height;

+    if (data_size / This->stride < This->cinfo.output_height)
+        /* overflow in multiplication */
+        return E_OUTOFMEMORY;
+
     This->image_data = malloc(data_size);
     if (!This->image_data)
         return E_OUTOFMEMORY;