--- libwmf-0.2.8.4/src/ipa/ipa/bmp.h 2015-06-08 14:46:24.591876404 +0100 +++ libwmf-0.2.8.4/src/ipa/ipa/bmp.h 2015-06-08 14:46:35.345993247 +0100 @@ -859,7 +859,7 @@ % % */ -static void DecodeImage (wmfAPI* API,wmfBMP* bmp,BMPSource* src,unsigned int compression,unsigned char* pixels) +static int DecodeImage (wmfAPI* API,wmfBMP* bmp,BMPSource* src,unsigned int compression,unsigned char* pixels) { int byte; int count; int i; @@ -870,12 +870,14 @@ U32 u; unsigned char* q; + unsigned char* end; for (u = 0; u < ((U32) bmp->width * (U32) bmp->height); u++) pixels[u] = 0; byte = 0; x = 0; q = pixels; + end = pixels + bmp->width * bmp->height; for (y = 0; y < bmp->height; ) { count = ReadBlobByte (src); @@ -884,7 +886,10 @@ { /* Encoded mode. */ byte = ReadBlobByte (src); for (i = 0; i < count; i++) - { if (compression == 1) + { + if (q == end) + return 0; + if (compression == 1) { (*(q++)) = (unsigned char) byte; } else @@ -896,13 +901,15 @@ else { /* Escape mode. */ count = ReadBlobByte (src); - if (count == 0x01) return; + if (count == 0x01) return 1; switch (count) { case 0x00: { /* End of line. */ x = 0; y++; + if (y >= bmp->height) + return 0; q = pixels + y * bmp->width; break; } @@ -910,13 +917,20 @@ { /* Delta mode. */ x += ReadBlobByte (src); y += ReadBlobByte (src); + if (y >= bmp->height) + return 0; + if (x >= bmp->width) + return 0; q = pixels + y * bmp->width + x; break; } default: { /* Absolute mode. */ for (i = 0; i < count; i++) - { if (compression == 1) + { + if (q == end) + return 0; + if (compression == 1) { (*(q++)) = ReadBlobByte (src); } else @@ -943,7 +957,7 @@ byte = ReadBlobByte (src); /* end of line */ byte = ReadBlobByte (src); - return; + return 1; } /* @@ -1143,8 +1157,18 @@ } } else - { /* Convert run-length encoded raster pixels. */ - DecodeImage (API,bmp,src,(unsigned int) bmp_info.compression,data->image); + { + if (bmp_info.bits_per_pixel == 8) /* Convert run-length encoded raster pixels. */ + { + if (!DecodeImage (API,bmp,src,(unsigned int) bmp_info.compression,data->image)) + { WMF_ERROR (API,"corrupt bmp"); + API->err = wmf_E_BadFormat; + } + } + else + { WMF_ERROR (API,"Unexpected pixel depth"); + API->err = wmf_E_BadFormat; + } } if (ERR (API)) --- libwmf-0.2.8.4/src/ipa/ipa.h 2015-06-08 14:46:24.590876393 +0100 +++ libwmf-0.2.8.4/src/ipa/ipa.h 2015-06-08 14:46:35.345993247 +0100 @@ -48,7 +48,7 @@ static unsigned short ReadBlobLSBShort (BMPSource*); static unsigned long ReadBlobLSBLong (BMPSource*); static long TellBlob (BMPSource*); -static void DecodeImage (wmfAPI*,wmfBMP*,BMPSource*,unsigned int,unsigned char*); +static int DecodeImage (wmfAPI*,wmfBMP*,BMPSource*,unsigned int,unsigned char*); static void ReadBMPImage (wmfAPI*,wmfBMP*,BMPSource*); static int ExtractColor (wmfAPI*,wmfBMP*,wmfRGB*,unsigned int,unsigned int); static void SetColor (wmfAPI*,wmfBMP*,wmfRGB*,unsigned char,unsigned int,unsigned int);