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avcodec/ffv1dec: Fix runtime error: signed integer overflow: 1550964438 + 1550964438 cannot be represented in type 'int' 

Fixes: 1559/clusterfuzz-testcase-minimized-5048096079740928
Fixes: 1560/clusterfuzz-testcase-minimized-6011037813833728

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8630b2cd36)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-13 23:24:04 +02:00
parent 6c00786561
commit 20ba865740
1 changed files with 2 additions and 1 deletions
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libavcodec/ffv1dec.c
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@ -45,7 +45,8 @@ static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
if (get_rac(c, state + 0)) if (get_rac(c, state + 0))
return 0; return 0;
else { else {
int i, e, a; int i, e;
unsigned a;
e = 0; e = 0;
while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10 while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
e++; e++;