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| author | Michael Niedermayer <michaelni@gmx.at> | 2014-10-03 16:08:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-10-03 16:33:06 +0200 |
| commit | e1c0cfaa419aa5d320540d5a1b3f8fd9b82ab7e5 (patch) | |
| tree | 1f7e560117b84acbae7cf07e006845f133a5e823 /libavcodec/tiff.c | |
| parent | 8b0e96e1f21b761ca15dbb470cd619a1ebf86c3e (diff) | |
| download | ffmpeg-e1c0cfaa419aa5d320540d5a1b3f8fd9b82ab7e5.tar.gz | |
avcodec/tiff: more completely check bpp/bppcount
Fixes pixel format selection
Fixes out of array accesses
Fixes: asan_heap-oob_1766029_6_asan_heap-oob_20aa045_332_cov_1823216757_m2-d1d366d7965db766c19a66c7a2ccbb6b.tif
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/tiff.c')
| -rw-r--r-- | libavcodec/tiff.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 6e2096fd69..0870e31817 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -814,13 +814,13 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) s->height = value; break; case TIFF_BPP: - s->bppcount = count; - if (count > 4) { + if (count > 4U) { av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", - s->bpp, count); + value, count); return AVERROR_INVALIDDATA; } + s->bppcount = count; if (count == 1) s->bpp = value; else { @@ -838,6 +838,13 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) s->bpp = -1; } } + if (s->bpp > 64U) { + av_log(s->avctx, AV_LOG_ERROR, + "This format is not supported (bpp=%d, %d components)\n", + s->bpp, count); + s->bpp = 0; + return AVERROR_INVALIDDATA; + } break; case TIFF_SAMPLES_PER_PIXEL: if (count != 1) { |