Fixed a BMP decoding bug (buffer underrun)

Fixes issue #8
jsummers · Apr 4, 2017 · 4500070 · 4500070
1 parent dc74009
commit 4500070
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/imagew-bmp.c b/src/imagew-bmp.c
@@ -371,6 +371,7 @@ static int iwbmp_read_info_header(struct iwbmprcontext *rctx)
 	// structure, and identifies the BMP version.
 	if(!iwbmp_read(rctx,buf,4)) goto done;
 	rctx->infoheader_size = iw_get_ui32le(&buf[0]);
+	if(rctx->infoheader_size<12) goto done;
 
 	// Read the rest of the header.
 	n = rctx->infoheader_size;