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lavf/mov.c: Avoid heap allocation wrap in mov_read_hdlr 

Core of patch is from paul@paulmehta.com
Reference https://crbug.com/643950

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Check value reduced as the code does not support larger lengths

(cherry picked from commit fd30e4d57f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Matt Wolenetz 2016-12-14 15:24:42 -08:00 committed by Michael Niedermayer
parent cdbaa022f4
commit bb7fd51239
1 changed files with 2 additions and 0 deletions
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2
libavformat/mov.c
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@ -576,6 +576,8 @@ static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
title_size = atom.size - 24;
if (title_size > 0) {
if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
return AVERROR_INVALIDDATA;
title_str = av_malloc(title_size + 1); /* Add null terminator */
if (!title_str)
return AVERROR(ENOMEM);