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opj_tcd_dc_level_shift_decode(): avoid int overflow. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2516. Credit to OSS Fuzz

This commit is contained in:
Even Rouault 2017-07-28 22:06:26 +02:00
parent 7bdbe490cb
commit 361c4506fd
1 changed files with 9 additions and 2 deletions
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11
src/lib/openjp2/tcd.c
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@ -1890,8 +1890,15 @@ static OPJ_BOOL opj_tcd_dc_level_shift_decode(opj_tcd_t *p_tcd)
for (j = 0; j < l_height; ++j) {
for (i = 0; i < l_width; ++i) {
OPJ_FLOAT32 l_value = *((OPJ_FLOAT32 *) l_current_ptr);
*l_current_ptr = opj_int_clamp((OPJ_INT32)opj_lrintf(l_value) +
l_tccp->m_dc_level_shift, l_min, l_max); ;
OPJ_INT32 l_value_int = (OPJ_INT32)opj_lrintf(l_value);
if (l_value > INT_MAX ||
(l_value_int > 0 && l_tccp->m_dc_level_shift > 0 &&
l_value_int > INT_MAX - l_tccp->m_dc_level_shift)) {
*l_current_ptr = l_max;
} else {
*l_current_ptr = opj_int_clamp(
l_value_int + l_tccp->m_dc_level_shift, l_min, l_max);
}
++l_current_ptr;
}
l_current_ptr += l_stride;