From adc09136a4a63b152630abeacb22c56541eacf60 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= Date: Sat, 28 Sep 2013 23:13:26 +0300 Subject: [PATCH] xwma: Avoid division by zero MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org Signed-off-by: Martin Storsjö --- libavformat/xwma.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libavformat/xwma.c b/libavformat/xwma.c index 52e423cef7..f4ff8157f8 100644 --- a/libavformat/xwma.c +++ b/libavformat/xwma.c @@ -198,6 +198,14 @@ static int xwma_read_header(AVFormatContext *s) /* Estimate the duration from the total number of output bytes. */ const uint64_t total_decoded_bytes = dpds_table[dpds_table_size - 1]; + + if (!bytes_per_sample) { + av_log(s, AV_LOG_ERROR, + "Invalid bits_per_coded_sample %d for %d channels\n", + st->codec->bits_per_coded_sample, st->codec->channels); + return AVERROR_INVALIDDATA; + } + st->duration = total_decoded_bytes / bytes_per_sample; /* Use the dpds data to build a seek table. We can only do this after