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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-17 03:54:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-10 01:33:28 +0200 |
| commit | 53dae9585f1fefb80794112f348df9ea6bc134ec (patch) | |
| tree | 42e9e70aced414fd874e22e7bd175d36abf37ec6 | |
| parent | 99491bd260d3847decb417ede86eb872586f2a6f (diff) | |
| download | ffmpeg-53dae9585f1fefb80794112f348df9ea6bc134ec.tar.gz | |
avcodec/pixlet: fixes integer overflow in read_highpass()
Fixes: runtime error: negation of -2147483648 cannot be represented in type 'int32_t' (aka 'int'); cast to an unsigned type to negate this value to itself
Fixes: 2879/clusterfuzz-testcase-minimized-6317542639403008
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 cadab5a2a74d715fc16325bd89f8b8091def1083)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pixlet.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index a9661d3ab6..088226bdda 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -331,6 +331,9 @@ static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame return AVERROR_INVALIDDATA; } + if (a == INT32_MIN) + return AVERROR_INVALIDDATA; + ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size, c, (b >= FFABS(a)) ? b : a, d, ctx->band[plane][i + 1].width, stride); |