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jpeg2000: fix dereferencing invalid pointers

Found-by: Laurent Butti <laurentb@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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commit 912ce9dd2080c5837285a471d750fa311e09b555 1 parent 800ea20
@michaelni michaelni authored
Showing with 8 additions and 6 deletions.
  1. +8 −6 libavcodec/jpeg2000.c
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14 libavcodec/jpeg2000.c
@@ -272,7 +272,7 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
reslevel->log2_prec_height) -
(reslevel->coord[1][0] >> reslevel->log2_prec_height);
- reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band));
+ reslevel->band = av_calloc(reslevel->nbands, sizeof(*reslevel->band));
if (!reslevel->band)
return AVERROR(ENOMEM);
@@ -368,7 +368,7 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
for (j = 0; j < 2; j++)
band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);
- band->prec = av_malloc_array(reslevel->num_precincts_x *
+ band->prec = av_calloc(reslevel->num_precincts_x *
(uint64_t)reslevel->num_precincts_y,
sizeof(*band->prec));
if (!band->prec)
@@ -509,10 +509,12 @@ void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
for (bandno = 0; bandno < reslevel->nbands; bandno++) {
Jpeg2000Band *band = reslevel->band + bandno;
for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
- Jpeg2000Prec *prec = band->prec + precno;
- av_freep(&prec->zerobits);
- av_freep(&prec->cblkincl);
- av_freep(&prec->cblk);
+ if (band->prec) {
+ Jpeg2000Prec *prec = band->prec + precno;
+ av_freep(&prec->zerobits);
+ av_freep(&prec->cblkincl);
+ av_freep(&prec->cblk);
+ }
}
av_freep(&band->prec);
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