avcodec/jpeg2000dec: Check reslevelno in RPCL

Fixes out of array read Fixes Ticket4627 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2026-06-19 19:03:00 +02:00 · 2015-06-15 03:00:53 +02:00
parent a58f1bcc4c
commit 5b0f55aab9
1 changed files with 3 additions and 0 deletions
@@ -1102,6 +1102,9 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
                        int xc = x / s->cdx[compno];
                        int yc = y / s->cdy[compno];

+                        if (reslevelno >= codsty->nreslevels)
+                            continue;
+
                        if (yc % (1 << (rlevel->log2_prec_height + reducedresno)))
                            continue;