avcodec/utils: Better check for channels in av_get_audio_frame_duration()

Fixes integer overflow Fixes: 0c2625f236ced104d402b4a03c0d65c7/asan_generic_274e1ce_5990_9314e7a67c26aecf011b178ade9f217c.avi Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
9 years ago · 4e16ad2868
parent 44a7f17d0b
commit 4e16ad2868
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@ -3067,7 +3067,7 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
                return frame_bytes * 8 / bps;
        }

-        if (ch > 0) {
+        if (ch > 0 && ch < INT_MAX/16) {
            /* calc from frame_bytes and channels */
            switch (id) {
            case AV_CODEC_ID_ADPCM_AFC: