Commit 78962d3d authored by Michael Niedermayer's avatar Michael Niedermayer Committed by Luca Barbato
Browse files

jpeg2000: Check that nreslevels2decode has been initialized before use

Avoid buffer overread.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: default avatarLuca Barbato <>
parent 86a2602e
......@@ -206,6 +206,11 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
int reslevelno, bandno, gbandno = 0, ret, i, j;
uint32_t csize = 1;
if (!codsty->nreslevels2decode) {
av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");
if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
codsty->nreslevels2decode - 1,
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