On Fri, Oct 11, 2019 at 08:00:00AM +, Andreas Rheinhardt wrote:
> lance.lmw...@gmail.com:
> > From: Limin Wang
> >
> > Signed-off-by: Limin Wang
> > ---
> > libavcodec/magicyuv.c | 43 ++-
> > 1 file changed, 30 insertions(+), 13 deletions(-)
> >
> > diff --git a/libavcodec/magicyuv.c b/libavcodec/magicyuv.c
> > index 0b1ac7345a..c905c2ca22 100644
> > --- a/libavcodec/magicyuv.c
> > +++ b/libavcodec/magicyuv.c
> > @@ -661,12 +661,16 @@ static int magy_decode_frame(AVCodecContext *avctx,
> > void *data,
> >
> > for (i = 0; i < s->planes; i++) {
> > av_fast_malloc(&s->slices[i], &s->slices_size[i], s->nb_slices *
> > sizeof(Slice));
> > -if (!s->slices[i])
> > -return AVERROR(ENOMEM);
> > +if (!s->slices[i]) {
> > +ret = AVERROR(ENOMEM);
> > +goto fail;
> > +}
> >
> > offset = bytestream2_get_le32(&gbyte);
> > -if (offset >= avpkt->size - header_size)
> > -return AVERROR_INVALIDDATA;
> > +if (offset >= avpkt->size - header_size) {
> > +ret = AVERROR_INVALIDDATA;
> > +goto fail;
> > +}
> >
> > if (i == 0)
> > first_offset = offset;
> > @@ -675,8 +679,10 @@ static int magy_decode_frame(AVCodecContext *avctx,
> > void *data,
> > s->slices[i][j].start = offset + header_size;
> >
> > next_offset = bytestream2_get_le32(&gbyte);
> > -if (next_offset <= offset || next_offset >= avpkt->size -
> > header_size)
> > -return AVERROR_INVALIDDATA;
> > +if (next_offset <= offset || next_offset >= avpkt->size -
> > header_size) {
> > +ret = AVERROR_INVALIDDATA;
> > +goto fail;
> > +}
> >
> > s->slices[i][j].size = next_offset - offset;
> > offset = next_offset;
> > @@ -686,28 +692,32 @@ static int magy_decode_frame(AVCodecContext *avctx,
> > void *data,
> > s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
> > }
> >
> > -if (bytestream2_get_byte(&gbyte) != s->planes)
> > -return AVERROR_INVALIDDATA;
> > +if (bytestream2_get_byte(&gbyte) != s->planes) {
> > +ret = AVERROR_INVALIDDATA;
> > +goto fail;
> > +}
> >
> > bytestream2_skip(&gbyte, s->nb_slices * s->planes);
> >
> > table_size = header_size + first_offset - bytestream2_tell(&gbyte);
> > -if (table_size < 2)
> > -return AVERROR_INVALIDDATA;
> > +if (table_size < 2) {
> > +ret = AVERROR_INVALIDDATA;
> > +goto fail;
> > +}
> >
> > ret = init_get_bits8(&gbit, avpkt->data + bytestream2_tell(&gbyte),
> > table_size);
> > if (ret < 0)
> > -return ret;
> > +goto fail;
> >
> > ret = build_huffman(avctx, &gbit, s->max);
> > if (ret < 0)
> > -return ret;
> > +goto fail;
> >
> > p->pict_type = AV_PICTURE_TYPE_I;
> > p->key_frame = 1;
> >
> > if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
> > -return ret;
> > +goto fail;
> >
> > s->buf = avpkt->data;
> > s->p = p;
> > @@ -736,6 +746,13 @@ static int magy_decode_frame(AVCodecContext *avctx,
> > void *data,
> > *got_frame = 1;
> >
> > return avpkt->size;
> > +
> > +fail:
> > +for (i = 0; i < FF_ARRAY_ELEMS(s->slices); i++) {
> > +av_freep(&s->slices[i]);
> > +s->slices_size[i] = 0;
> > +}
> > +return ret;
> > }
> >
> > #if HAVE_THREADS
> >
> Why should there be a memleak? The slices buffer will be freed in
> magy_decode_end (which is called from avcodec_close() (usually via
> avcodec_free_context()) at the end of the decoding process). So how
> did you detect this memleak?
>
Have double check it's freed in magy_decode_end, it's my
misunderstanding. Please ignore it.
> - Andreas
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