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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-18 17:51:08 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-18 19:08:23 +0300 |
| commit | d32ebce8fd79bb859ba4a04c92470a052f2aafa6 (patch) | |
| tree | a77fb77942d73faa50da56c8372fdbdc6776234e /libavcodec/pixlet.c | |
| parent | 5c9e12bc6d3e4847896fcb51e76d26aa7922e5d7 (diff) | |
avcodec/pixlet: Fix reading invalid numbers of bits
Fixes: asertion failure
Fixes: 1664/clusterfuzz-testcase-minimized-6587801187385344
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/pixlet.c')
| -rw-r--r-- | libavcodec/pixlet.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index 05262648ae..0dfd5edbf7 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -229,6 +229,8 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i cnt1 = get_bits(b, nbits); } else { pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14)); + if (pfx < 1 || pfx > 25) + return AVERROR_INVALIDDATA; cnt1 *= (1 << pfx) - 1; shbits = show_bits(b, pfx); if (shbits <= 1) { |