[FFmpeg-cvslog] avcodec/aacdec_fixed: Fix runtime error: shift exponent 34 is too large for 32-bit type 'int'
Michael Niedermayer
git at videolan.org
Sun Jun 18 17:26:20 EEST 2017
ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun May 21 16:53:55 2017 +0200| [9a680966d1be0305855bfa4a5cee7cbbe1bbf218] | committer: Michael Niedermayer
avcodec/aacdec_fixed: Fix runtime error: shift exponent 34 is too large for 32-bit type 'int'
Fixes: 1721/clusterfuzz-testcase-minimized-4719352135811072
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit b5228e44c7f3a5eba537c8a39a45cfbf2961a28d)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9a680966d1be0305855bfa4a5cee7cbbe1bbf218
---
libavcodec/aacdec_fixed.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index 1b5e8aa326..33f959070c 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -207,7 +207,11 @@ static void noise_scale(int *coefs, int scale, int band_energy, int len)
c /= band_energy;
s = 21 + nlz - (s >> 2);
- if (s > 0) {
+ if (s > 31) {
+ for (i=0; i<len; i++) {
+ coefs[i] = 0;
+ }
+ } else if (s > 0) {
round = 1 << (s-1);
for (i=0; i<len; i++) {
out = (int)(((int64_t)coefs[i] * c) >> 32);
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