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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2014-06-22 13:11:32 -0400 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2014-06-22 20:31:57 -0400 |
| commit | 44127546b0a81dc9dd6190739a62d48f0044c6f3 (patch) | |
| tree | 5e9d4c8a11ef2d3f80f7359f7644701e45f1925b | |
| parent | 463a7cde563fd805864c48a76dd1b03fc24671ed (diff) | |
| download | ffmpeg-44127546b0a81dc9dd6190739a62d48f0044c6f3.tar.gz | |
Check if an mp3 header is using a reserved sample rate.
Fixes an invalid read past the end of avpriv_mpa_freq_tab.
Fixes divide-by-zero due to sample_rate being set to 0.
Bug-Id: 705
CC:libav-stable@libav.org
| -rw-r--r-- | libavcodec/mpegaudiodecheader.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mpegaudiodecheader.c b/libavcodec/mpegaudiodecheader.c index 69dda452c3..25e73195b8 100644 --- a/libavcodec/mpegaudiodecheader.c +++ b/libavcodec/mpegaudiodecheader.c @@ -24,6 +24,8 @@ * MPEG Audio header decoder. */ +#include "libavutil/common.h" + #include "avcodec.h" #include "mpegaudio.h" #include "mpegaudiodata.h" @@ -45,6 +47,8 @@ int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header) s->layer = 4 - ((header >> 17) & 3); /* extract frequency */ sample_rate_index = (header >> 10) & 3; + if (sample_rate_index >= FF_ARRAY_ELEMS(avpriv_mpa_freq_tab)) + sample_rate_index = 0; sample_rate = avpriv_mpa_freq_tab[sample_rate_index] >> (s->lsf + mpeg25); sample_rate_index += 3 * (s->lsf + mpeg25); s->sample_rate_index = sample_rate_index; |