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Code Issues Releases Activity

oggdec: prevent codec from changing through ogg_replace_stream()

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This prevents inconsistencies leading to out of array accesses.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-05 04:38:57 +01:00
parent 599ae9995f
commit 9db3fb6ed8
1 changed files with 3 additions and 0 deletions
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3
libavformat/oggdec.c
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@ -174,6 +174,7 @@ static int ogg_replace_stream(AVFormatContext *s, uint32_t serial)
struct ogg_stream *os;
unsigned bufsize;
uint8_t *buf;
struct ogg_codec *codec;
if (ogg->nstreams != 1) {
av_log_missing_feature(s, "Changing stream parameters in multistream ogg", 0);
@ -184,6 +185,7 @@ static int ogg_replace_stream(AVFormatContext *s, uint32_t serial)
buf = os->buf;
bufsize = os->bufsize;
codec = os->codec;
if (!ogg->state || ogg->state->streams[0].private != os->private)
av_freep(&ogg->streams[0].private);
@ -195,6 +197,7 @@ static int ogg_replace_stream(AVFormatContext *s, uint32_t serial)
os->bufsize = bufsize;
os->buf = buf;
os->header = -1;
os->codec = codec;
return 0;
}