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avcodec/jpeg2000dec: non zero image offsets are not supported

Fixes out of array accesses
Fixes Ticket3080
Found-by: ami_stuff
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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commit 780669ef7c23c00836a24921fcc6b03be2b8ca4a 1 parent 3c9dd93
@michaelni michaelni authored
Showing with 5 additions and 0 deletions.
  1. +5 −0 libavcodec/jpeg2000dec.c
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5 libavcodec/jpeg2000dec.c
@@ -243,6 +243,11 @@ static int get_siz(Jpeg2000DecoderContext *s)
s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
ncomponents = bytestream2_get_be16u(&s->g); // CSiz
+ if (s->image_offset_x || s->image_offset_y) {
+ avpriv_request_sample(s->avctx, "Support for image offsets");
+ return AVERROR_PATCHWELCOME;
+ }
+
if (ncomponents <= 0) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
s->ncomponents);
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