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avcodec/ac3dec: Fix shift signedness in mask creation 

Fixes: 9924/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EAC3_fuzzer-5473421772193792
Fixes: left shift of 1 by 63 places cannot be represented in type 'long long'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-09-21 02:36:50 +02:00
parent fe315feab5
commit 148a21611d
1 changed files with 2 additions and 2 deletions
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4
libavcodec/ac3dec.c
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@ -1708,9 +1708,9 @@ dependent_frame:
int i;
for (i = 0; i < 64; i++) {
if ((1LL << i) & ff_eac3_custom_channel_map_locations[ch][1]) {
if ((1ULL << i) & ff_eac3_custom_channel_map_locations[ch][1]) {
int index = av_get_channel_layout_channel_index(channel_layout,
1LL << i);
1ULL << i);
if (index < 0)
return AVERROR_INVALIDDATA;
if (extend >= channel_map_size)