[FFmpeg-cvslog] avcodec/exr: Check x/ysize
Michael Niedermayer
git at videolan.org
Mon Sep 26 01:23:33 EEST 2022
ffmpeg | branch: release/4.4 | Michael Niedermayer <michael at niedermayer.cc> | Mon Jul 18 22:46:45 2022 +0200| [f18d625883964f16481139cfe2c898200f7f254b] | committer: Michael Niedermayer
avcodec/exr: Check x/ysize
Fixes: OOM
Fixes: 48911/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-6352002510094336
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 614a4d1476c6e3561ebab3977cb43b2b4b6406fd)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f18d625883964f16481139cfe2c898200f7f254b
---
libavcodec/exr.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index b6bf87ab81..642a86ae6d 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -1240,7 +1240,8 @@ 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)
+ if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX ||
+ av_image_check_size2(td->xsize, td->ysize, s->avctx->max_pixels, AV_PIX_FMT_NONE, 0, s->avctx) < 0)
return AVERROR_INVALIDDATA;
td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
@@ -1264,7 +1265,8 @@ 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)
+ if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX ||
+ av_image_check_size2(td->xsize, td->ysize, s->avctx->max_pixels, AV_PIX_FMT_NONE, 0, s->avctx) < 0)
return AVERROR_INVALIDDATA;
td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
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