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avutil/integer: Fix integer overflow in av_mul_i()

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Found-by: fate
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3cc3cb663bf3061e40356392d2f7638de6a479fe)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-10-24 01:44:12 +02:00
parent 3049d6d821
commit 6f84b1c458
1 changed files with 1 additions and 1 deletions
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libavutil/integer.c
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@ -74,7 +74,7 @@ AVInteger av_mul_i(AVInteger a, AVInteger b){
if(a.v[i]) if(a.v[i])
for(j=i; j<AV_INTEGER_SIZE && j-i<=nb; j++){ for(j=i; j<AV_INTEGER_SIZE && j-i<=nb; j++){
carry= (carry>>16) + out.v[j] + a.v[i]*b.v[j-i]; carry= (carry>>16) + out.v[j] + a.v[i]*(unsigned)b.v[j-i];
out.v[j]= carry; out.v[j]= carry;
} }
} }