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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-26 22:04:16 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-11 16:42:49 +0200 |
| commit | 9b72cea4463dd2fabcd9ba1454a0855e521d0148 (patch) | |
| tree | 2d154f724669950ecdb214bc50104c783a4a8cdf /libavcodec/exr.c | |
| parent | 6949df35d0c69ae91bb0f49069e0703deb9bd676 (diff) | |
avcodec/exr: Check line size for overflow
Fixes: signed integer overflow: 570425356 * 6 cannot be represented in type 'int
Fixes: 25929/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5099197739827200
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/exr.c')
| -rw-r--r-- | libavcodec/exr.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c index c80e8eb5e0..162b3bb252 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1040,6 +1040,9 @@ static int decode_block(AVCodecContext *avctx, void *tdata, td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tile_y * s->tile_attr.ySize); td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tile_x * s->tile_attr.xSize); + if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX) + return AVERROR_INVALIDDATA; + td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */ uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */ } else { @@ -1059,6 +1062,9 @@ static int decode_block(AVCodecContext *avctx, void *tdata, td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */ td->xsize = s->xdelta; + if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX) + return AVERROR_INVALIDDATA; + td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */ uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */ |