Fixes: out of array read
Fixes: tickets/10744/poc11ffmpeg
Found-by: Li Zeyuan and Zeng Yunxiang.
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavfilter/af_alimiter.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libavfilter/af_alimiter.c b/libavfilter/af_alimiter.c
index f08893229de..9a867047643 100644
--- a/libavfilter/af_alimiter.c
+++ b/libavfilter/af_alimiter.c
@@ -195,9 +195,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
int j = i % buffer_size;
double ppeak = 0, pdelta;
- for (c = 0; c < channels; c++) {
- ppeak = FFMAX(ppeak, fabs(buffer[nextpos[j] + c]));
- }
+ if (nextpos[j] >= 0)
+ for (c = 0; c < channels; c++) {
+ ppeak = FFMAX(ppeak, fabs(buffer[nextpos[j] + c]));
+ }
pdelta = (limit / peak - limit / ppeak) / (((buffer_size -
nextpos[j] + s->pos) % buffer_size) / channels);
if (pdelta < nextdelta[j]) {
nextdelta[j] = pdelta;
--
2.17.1
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