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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-01-11 20:50:39 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-02-25 22:49:27 +0100 |
| commit | 718d6c71ef7eff75050e636e6ea5cde165496488 (patch) | |
| tree | e97efa7c8b9b6e4df031286efd9ffe3bd94c725b | |
| parent | 8ab01c8b0d255605324c7cb2232d5008cc3586ef (diff) | |
| download | ffmpeg-718d6c71ef7eff75050e636e6ea5cde165496488.tar.gz | |
avcodec/bink: Avoid undefined out of array end pointers in binkb_decode_plane()
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ea9deafd3b13233802c4548c4c58a707d76805a3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/bink.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/bink.c b/libavcodec/bink.c index a3140114f0..15fc9d29ed 100644 --- a/libavcodec/bink.c +++ b/libavcodec/bink.c @@ -870,7 +870,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb, binkb_init_bundles(c); ref_start = frame->data[plane_idx]; - ref_end = frame->data[plane_idx] + (bh * frame->linesize[plane_idx] + bw - 1) * 8; + ref_end = frame->data[plane_idx] + ((bh - 1) * frame->linesize[plane_idx] + bw - 1) * 8; for (i = 0; i < 64; i++) coordmap[i] = (i & 7) + (i >> 3) * stride; @@ -926,7 +926,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb, xoff = binkb_get_value(c, BINKB_SRC_X_OFF); yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias; ref = dst + xoff + yoff * stride; - if (ref < ref_start || ref + 8*stride > ref_end) { + if (ref < ref_start || ref > ref_end) { av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n"); } else if (ref + 8*stride < dst || ref >= dst + 8*stride) { c->put_pixels_tab(dst, ref, stride, 8); @@ -942,7 +942,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb, xoff = binkb_get_value(c, BINKB_SRC_X_OFF); yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias; ref = dst + xoff + yoff * stride; - if (ref < ref_start || ref + 8 * stride > ref_end) { + if (ref < ref_start || ref > ref_end) { av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n"); } else if (ref + 8*stride < dst || ref >= dst + 8*stride) { c->put_pixels_tab(dst, ref, stride, 8); @@ -974,7 +974,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb, xoff = binkb_get_value(c, BINKB_SRC_X_OFF); yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias; ref = dst + xoff + yoff * stride; - if (ref < ref_start || ref + 8 * stride > ref_end) { + if (ref < ref_start || ref > ref_end) { av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n"); } else if (ref + 8*stride < dst || ref >= dst + 8*stride) { c->put_pixels_tab(dst, ref, stride, 8); |