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avutil/eval: Unconditionally check argument of e_div 

Fixes: division by zero
Fixes: 26451/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVO_fuzzer-4756955832516608

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-20 20:33:50 +02:00
parent b0259aa248
commit 90e4862ffa
1 changed files with 1 additions and 1 deletions
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libavutil/eval.c
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@ -317,7 +317,7 @@ static double eval_expr(Parser *p, AVExpr *e)
case e_lte: return e->value * (d <= d2 ? 1.0 : 0.0);
case e_pow: return e->value * pow(d, d2);
case e_mul: return e->value * (d * d2);
case e_div: return e->value * ((!CONFIG_FTRAPV || d2 ) ? (d / d2) : d * INFINITY);
case e_div: return e->value * (d2 ? (d / d2) : d * INFINITY);
case e_add: return e->value * (d + d2);
case e_last:return e->value * d2;
case e_st : return e->value * (p->var[av_clip(d, 0, VARS-1)]= d2);