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Fix possible heap overflow caused by av_fast_realloc()

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Originally committed as revision 12579 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-03-25 10:15:17 +00:00
parent cb6b4c98d2
commit 978805b2c5
1 changed files with 5 additions and 1 deletions
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6
libavcodec/utils.c
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@ -66,7 +66,11 @@ void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
*size= FFMAX(17*min_size/16 + 32, min_size);
return av_realloc(ptr, *size);
ptr= av_realloc(ptr, *size);
if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
*size= 0;
return ptr;
}
static unsigned int last_static = 0;