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asfdec_o: prevent overflow causing seekback

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This fixes infinite loops.

Reviewed-by: Alexandra Hájková <alexandra.khirnova@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-01-06 14:09:22 +01:00
parent 0002d845e8
commit 74474750f1
1 changed files with 1 additions and 1 deletions
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libavformat/asfdec_o.c
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@ -167,7 +167,7 @@ static void swap_guid(ff_asf_guid guid)
static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
{
if (avio_tell(pb) != offset + size)
if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
avio_seek(pb, offset + size, SEEK_SET);
}