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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-10 18:14:43 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-11 01:25:33 +0300 |
| commit | 5086d2269747234bd371729a34b7f30467443460 (patch) | |
| tree | 4c0a0a746ddf5d1e655d52f61b7ff373014300b4 | |
| parent | 3c4679c4302d04fdd92eca65321fe0af5cc08a42 (diff) | |
avcodec/tiff: Check input space in dng_decode_jpeg()
Fixes: out of array read
Fixes: 24034/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5111884337119232
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 79e8d17024e6c6328a40fcee191ffd70798a9c6e)
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 6a3ec3ef95..18b327e800 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -882,6 +882,9 @@ static int dng_decode_jpeg(AVCodecContext *avctx, AVFrame *frame, int is_single_comp, is_u16, pixel_size; int ret; + if (tile_byte_count < 0 || tile_byte_count > bytestream2_get_bytes_left(&s->gb)) + return AVERROR_INVALIDDATA; + /* Prepare a packet and send to the MJPEG decoder */ av_init_packet(&jpkt); jpkt.data = (uint8_t*)s->gb.buffer; |