avcodec/mjpegdec: check that component linesize is always valid

2 years ago · 55753fc712
parent a9d15d43eb
commit 55753fc712
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@ -1512,7 +1512,7 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
                                       "error y=%d x=%d\n", mb_y, mb_x);
                                return AVERROR_INVALIDDATA;
                            }
-                            if (ptr) {
+                            if (ptr && linesize[c]) {
                                s->idsp.idct_put(ptr, linesize[c], s->block);
                                if (s->bits & 7)
                                    shift_output(s, ptr, linesize[c]);