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avcodec/pixlet: Fix shift exponent 4294967268 is too large for 32-bit type 'int'

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Fixes: 1336/clusterfuzz-testcase-minimized-4761381930795008

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-05 13:02:22 +02:00
parent ce551a3925
commit 1f5b6c7e1e
1 changed files with 2 additions and 2 deletions
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4
libavcodec/pixlet.c
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@ -154,7 +154,7 @@ static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size, int wi
state = 120 * (escape + flag) + state - (120 * state >> 8);
flag = 0;
if (state * 4 > 0xFF || i >= size)
if (state * 4ULL > 0xFF || i >= size)
continue;
nbits = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
@ -260,7 +260,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i
flag = 0;
if (state * 4 > 0xFF || i >= size)
if (state * 4ULL > 0xFF || i >= size)
continue;
pfx = ((state + 8) >> 5) + (state ? ff_clz(state): 32) - 24;