openharmony/third_party_ffmpeg
1
0
Fork 0
mirror of https://gitee.com/openharmony/third_party_ffmpeg synced 2024-11-24 03:39:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

avcodec/aacdec_fixed: fix invalid shift in predict()

Browse Source 
Fixes: runtime error: shift exponent -2 is negative
Fixes: 2818/clusterfuzz-testcase-minimized-5062943676825600

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 2017-08-04 03:26:30 +02:00
parent 1f53bde6d8
commit 1e443051b2
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libavcodec/aacdec_fixed.c
View File

@ -305,8 +305,12 @@ static av_always_inline void predict(PredictorState *ps, int *coef,
if (output_enable) {
int shift = 28 - pv.exp;
if (shift < 31)
if (shift < 31) {
if (shift > 0) {
*coef += (pv.mant + (1 << (shift - 1))) >> shift;
} else
*coef += pv.mant << -shift;
}
}
e0 = av_int2sf(*coef, 2);