1. ffmpeg
  2. Commit 763a808c96bb1d95afe5a4b04d2688de4e605216
Browse code

avformat/flvdec: initialize context before reading from it

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7f9b8387069e_5377_flv_with_pcm_s16be_audio_track.flv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 396ddcf22d55fa7e735d69eed22a4a4b1649b73c)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Michael Niedermayer authored on 2014/01/11 04:58:19
Showing 1 changed files
libavformat/flvdec.c
History View file @ 763a808
... ... 
@@ -916,7 +916,7 @@ retry_duration:
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             flv->last_channels    =
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             channels              = st->codec->channels;
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         } else {
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-            AVCodecContext ctx;
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+            AVCodecContext ctx = {0};
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             ctx.sample_rate = sample_rate;
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             flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
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             sample_rate = ctx.sample_rate;