[FFmpeg-devel] [PATCH] avcodec/ac3dec: Fix shift signedness in mask creation
Michael Niedermayer
michael at niedermayer.cc
Fri Sep 21 15:30:53 EEST 2018
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 at niedermayer.cc>
---
libavcodec/ac3dec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index eed8ce5b39..e4d293a2aa 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -1708,7 +1708,7 @@ 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);
if (index < 0)
--
2.19.0
More information about the ffmpeg-devel
mailing list