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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-21 23:27:59 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-22 17:31:16 +0200 |
| commit | 6fbd4d22859bbf7b8b1d27a722efd8947688b5ce (patch) | |
| tree | 4f165bcb531593a199392812e02c956c877d811a | |
| parent | fa511b03d3a7d02e4c6bd1e17d12eac2d71fd03c (diff) | |
| download | ffmpeg-6fbd4d22859bbf7b8b1d27a722efd8947688b5ce.tar.gz | |
avcodec/tiff: Check tile_length and tile_width
Fixes: Division by 0
Fixes: 49235/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5495613847896064
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 76112c2b4167bb3c40503b3334c8b38fd707a8d5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/tiff.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index bf69b083b3..2d40626ccc 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -965,6 +965,9 @@ static int dng_decode_tiles(AVCodecContext *avctx, AVFrame *frame, int pos_x = 0, pos_y = 0; int ret; + if (s->tile_width <= 0 || s->tile_length <= 0) + return AVERROR_INVALIDDATA; + has_width_leftover = (s->width % s->tile_width != 0); has_height_leftover = (s->height % s->tile_length != 0); |