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[1.5] Fix heap buffer overflow 

Enforce sanity checks on tile number and tile length, even when the (rather
broken) USE_JPWL code isn't enabled.
This commit is contained in:
Mathieu Malaterre 2012-07-10 13:08:08 +00:00
parent 8062f74deb
commit abce31e706
1 changed files with 23 additions and 3 deletions
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26
libopenjpeg/j2k.c
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@ -1279,7 +1279,7 @@ static void j2k_read_sot(opj_j2k_t *j2k) {
static int backup_tileno = 0;
/* tileno is negative or larger than the number of tiles!!! */
if ((tileno < 0) || (tileno > (cp->tw * cp->th))) {
if ((tileno < 0) || (tileno >= (cp->tw * cp->th))) {
opj_event_msg(j2k->cinfo, EVT_ERROR,
"JPWL: bad tile number (%d out of a maximum of %d)\n",
tileno, (cp->tw * cp->th));
@ -1296,8 +1296,18 @@ static void j2k_read_sot(opj_j2k_t *j2k) {
/* keep your private count of tiles */
backup_tileno++;
};
}
else
#endif /* USE_JPWL */
{
/* tileno is negative or larger than the number of tiles!!! */
if ((tileno < 0) || (tileno >= (cp->tw * cp->th))) {
opj_event_msg(j2k->cinfo, EVT_ERROR,
"JPWL: bad tile number (%d out of a maximum of %d)\n",
tileno, (cp->tw * cp->th));
return;
}
}
if (cp->tileno_size == 0) {
cp->tileno[cp->tileno_size] = tileno;
@ -1335,8 +1345,18 @@ static void j2k_read_sot(opj_j2k_t *j2k) {
totlen);
}
};
}
else
#endif /* USE_JPWL */
{
/* totlen is negative or larger than the bytes left!!! */
if ((totlen < 0) || (totlen > (cio_numbytesleft(cio) + 8))) {
opj_event_msg(j2k->cinfo, EVT_ERROR,
"JPWL: bad tile byte size (%d bytes against %d bytes left)\n",
totlen, cio_numbytesleft(cio) + 8);
return;
}
}
if (!totlen)
totlen = cio_numbytesleft(cio) + 8;