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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-06 21:42:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:37:20 +0200 |
| commit | b0fd8d6b1523f4f89f20e3a34ffa6a39156a2d56 (patch) | |
| tree | 62932b6222dfcf05597eb80c0d30a69990587b06 | |
| parent | 2dc9462462ac160ea0345dfe256d85b934de19a3 (diff) | |
| download | ffmpeg-b0fd8d6b1523f4f89f20e3a34ffa6a39156a2d56.tar.gz | |
avcodec/tiff: Check bpp/bppcount for 0
Fixes: division by zero
Fixes: 24253/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-6250318007107584
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 be090da25f734460f3105075456877b8a66185c1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/tiff.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index bf17d9fe60..a9f93494ed 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -831,7 +831,7 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) s->height = value; break; case TIFF_BPP: - if (count > 4U) { + if (count > 4 || count <= 0) { av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", value, count); @@ -862,9 +862,9 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) "Samples per pixel requires a single value, many provided\n"); return AVERROR_INVALIDDATA; } - if (value > 4U) { + if (value > 4 || value <= 0) { av_log(s->avctx, AV_LOG_ERROR, - "Samples per pixel %d is too large\n", value); + "Invalid samples per pixel %d\n", value); return AVERROR_INVALIDDATA; } if (s->bppcount == 1) |