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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-06 21:42:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:19 +0200 |
| commit | a590a733fa97a95aecb060231f34fafcb63e553c (patch) | |
| tree | 0aee1930f65e15b95de55541a728edaf85250323 | |
| parent | ab4e05cfed569c9c3677486c65ddea91c4df365d (diff) | |
| download | ffmpeg-a590a733fa97a95aecb060231f34fafcb63e553c.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 da422c1459..b8d4e849c7 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -819,7 +819,7 @@ 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); @@ -850,9 +850,9 @@ 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) |