RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

pcx: round up in bits->bytes conversion in a buffer size check 

Fixes invalid reads.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov 2013-11-15 19:06:23 +01:00
parent c918e08b9c
commit 430d121964
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/pcx.c
View File

@ -109,7 +109,7 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
nplanes = buf[65]; nplanes = buf[65];
bytes_per_scanline = nplanes * bytes_per_line; bytes_per_scanline = nplanes * bytes_per_line;
if (bytes_per_scanline < w * bits_per_pixel * nplanes / 8 || if (bytes_per_scanline < (w * bits_per_pixel * nplanes + 7) / 8 ||
(!compressed && bytes_per_scanline > buf_size / h)) { (!compressed && bytes_per_scanline > buf_size / h)) {
av_log(avctx, AV_LOG_ERROR, "PCX data is corrupted\n"); av_log(avctx, AV_LOG_ERROR, "PCX data is corrupted\n");
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;