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Add overflow checks for opj_aligned_malloc (#841) 

See
https://pdfium.googlesource.com/pdfium/+/b20ab6c7acb3be1393461eb650ca8fa4660c937e/third_party/libopenjpeg20/0020-opj_aligned_malloc.patch
This commit is contained in:
Matthieu Darbois 2016-09-15 01:57:53 +02:00 committed by GitHub
parent f88c9974e2
commit 9a07ccb3d0
3 changed files with 135 additions and 30 deletions
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36
src/lib/openjp2/dwt.c
View File

@ -395,7 +395,7 @@ static INLINE OPJ_BOOL opj_dwt_encode_procedure(opj_tcd_tilecomp_t * tilec,void
OPJ_INT32 rw; /* width of the resolution level computed */
OPJ_INT32 rh; /* height of the resolution level computed */
OPJ_UINT32 l_data_size;
size_t l_data_size;
opj_tcd_resolution_t * l_cur_res = 0;
opj_tcd_resolution_t * l_last_res = 0;
@ -407,8 +407,14 @@ static INLINE OPJ_BOOL opj_dwt_encode_procedure(opj_tcd_tilecomp_t * tilec,void
l_cur_res = tilec->resolutions + l;
l_last_res = l_cur_res - 1;
l_data_size = opj_dwt_max_resolution( tilec->resolutions,tilec->numresolutions) * (OPJ_UINT32)sizeof(OPJ_INT32);
bj = (OPJ_INT32*)opj_malloc((size_t)l_data_size);
l_data_size = opj_dwt_max_resolution( tilec->resolutions,tilec->numresolutions);
/* overflow check */
if (l_data_size > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
l_data_size *= sizeof(OPJ_INT32);
bj = (OPJ_INT32*)opj_malloc(l_data_size);
/* l_data_size is equal to 0 when numresolutions == 1 but bj is not used */
/* in that case, so do not error out */
if (l_data_size != 0 && ! bj) {
@ -638,7 +644,13 @@ static OPJ_BOOL opj_dwt_decode_tile(opj_thread_pool_t* tp, opj_tcd_tilecomp_t* t
return OPJ_TRUE;
}
num_threads = opj_thread_pool_get_thread_count(tp);
h_mem_size = opj_dwt_max_resolution(tr, numres) * sizeof(OPJ_INT32);
h_mem_size = opj_dwt_max_resolution(tr, numres);
/* overflow check */
if (h_mem_size > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
h_mem_size *= sizeof(OPJ_INT32);
h.mem = (OPJ_INT32*)opj_aligned_malloc(h_mem_size);
if (! h.mem){
/* FIXME event manager error callback */
@ -1003,7 +1015,21 @@ OPJ_BOOL opj_dwt_decode_real(opj_tcd_tilecomp_t* OPJ_RESTRICT tilec, OPJ_UINT32
OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0);
h.wavelet = (opj_v4_t*) opj_aligned_malloc((opj_dwt_max_resolution(res, numres)+5) * sizeof(opj_v4_t));
size_t l_data_size;
l_data_size = opj_dwt_max_resolution(res, numres);
/* overflow check */
if (l_data_size > (SIZE_MAX - 5U)) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
l_data_size += 5U;
/* overflow check */
if (l_data_size > (SIZE_MAX / sizeof(opj_v4_t))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
h.wavelet = (opj_v4_t*) opj_aligned_malloc(l_data_size * sizeof(opj_v4_t));
if (!h.wavelet) {
/* FIXME event manager error callback */
return OPJ_FALSE;

4
src/lib/openjp2/pi.c
View File

@ -1238,14 +1238,14 @@ opj_pi_iterator_t *opj_pi_create_decode(opj_image_t *p_image,
/* memory allocation for include */
/* prevent an integer overflow issue */
/* 0 < l_tcp->numlayers < 65536 c.f. opj_j2k_read_cod in j2k.c */
l_current_pi->include = 00;
if (l_step_l <= (SIZE_MAX / (l_tcp->numlayers + 1U)))
{
l_current_pi->include = (OPJ_INT16*) opj_calloc((size_t)(l_tcp->numlayers + 1U) * l_step_l, sizeof(OPJ_INT16));
}
if
(!l_current_pi->include)
if (!l_current_pi->include)
{
opj_free(l_tmp_data);
opj_free(l_tmp_ptr);

125
src/lib/openjp2/t1.c
View File

@ -1406,56 +1406,135 @@ static OPJ_BOOL opj_t1_allocate_buffers(
OPJ_UINT32 w,
OPJ_UINT32 h)
{
OPJ_UINT32 datasize=w * h;
OPJ_UINT32 flagssize;
/* encoder uses tile buffer, so no need to allocate */
if (!t1->encoder) {
if(datasize > t1->datasize){
size_t datasize;
#if (SIZE_MAX / 0xFFFFFFFFU) < 0xFFFFFFFFU /* UINT32_MAX */
/* Overflow check */
if ((w > 0U) && ((size_t)h > (SIZE_MAX / (size_t)w))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#endif
datasize = (size_t)w * h;
/* Overflow check */
if (datasize > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
if(datasize > (size_t)t1->datasize){
opj_aligned_free(t1->data);
t1->data = (OPJ_INT32*) opj_aligned_malloc(datasize * sizeof(OPJ_INT32));
if(!t1->data){
/* FIXME event manager error callback */
return OPJ_FALSE;
}
t1->datasize=datasize;
#if SIZE_MAX > 0xFFFFFFFFU /* UINT32_MAX */
/* TODO remove this if t1->datasize type changes to size_t */
/* Overflow check */
if (datasize > (size_t)0xFFFFFFFFU /* UINT32_MAX */) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#endif
t1->datasize = (OPJ_UINT32)datasize;
}
/* memset first arg is declared to never be null by gcc */
if (t1->data != NULL) {
memset(t1->data,0,datasize * sizeof(OPJ_INT32));
memset(t1->data, 0, datasize * sizeof(OPJ_INT32));
}
}
t1->flags_stride=w+2;
flagssize=t1->flags_stride * (h+2);
if(flagssize > t1->flagssize){
opj_aligned_free(t1->flags);
t1->flags = (opj_flag_t*) opj_aligned_malloc(flagssize * sizeof(opj_flag_t));
if(!t1->flags){
{
size_t flagssize;
/* Overflow check */
if (w > (0xFFFFFFFFU /* UINT32_MAX */ - 2U)) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
t1->flagssize=flagssize;
}
memset(t1->flags,0,flagssize * sizeof(opj_flag_t));
if (!t1->encoder) {
OPJ_UINT32 colflags_size=t1->flags_stride * ((h+3) / 4 + 2);
t1->flags_stride = w + 2U; /* can't be 0U */
if(colflags_size > t1->colflags_size){
#if (SIZE_MAX - 3U) < 0xFFFFFFFFU /* UINT32_MAX */
/* Overflow check */
if (h > (0xFFFFFFFFU /* UINT32_MAX */ - 3U)) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#endif
flagssize = (size_t)h + 3U;
/* Overflow check */
if (flagssize > (SIZE_MAX / (size_t)t1->flags_stride)) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
flagssize *= (size_t)t1->flags_stride;
if(flagssize > (size_t)t1->flagssize){
/* Overflow check */
if (flagssize > (SIZE_MAX / sizeof(opj_flag_t))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
opj_aligned_free(t1->flags);
t1->flags = (opj_flag_t*) opj_aligned_malloc(flagssize * sizeof(opj_flag_t));
if(!t1->flags){
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#if SIZE_MAX > 0xFFFFFFFFU /* UINT32_MAX */
/* TODO remove this if t1->flagssize type changes to size_t */
/* Overflow check */
if (flagssize > (size_t)0xFFFFFFFFU /* UINT32_MAX */) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#endif
t1->flagssize = (OPJ_UINT32)flagssize;
}
memset(t1->flags, 0, flagssize * sizeof(opj_flag_t));
}
if (!t1->encoder) {
size_t colflags_size = ((((size_t)h + 3U) / 4U) + 2U); /* Can't overflow, h checked against UINT32_MAX - 3U */
/* Overflow check */
if (colflags_size > (SIZE_MAX / (size_t)t1->flags_stride)) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
colflags_size *= (size_t)t1->flags_stride;
if(colflags_size > (size_t)t1->colflags_size){
/* Overflow check */
if ((size_t)colflags_size > (SIZE_MAX / sizeof(opj_colflag_t))) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
opj_aligned_free(t1->colflags);
t1->colflags = (opj_colflag_t*) opj_aligned_malloc(colflags_size * sizeof(opj_colflag_t));
if(!t1->colflags){
/* FIXME event manager error callback */
return OPJ_FALSE;
}
t1->colflags_size=colflags_size;
#if SIZE_MAX > 0xFFFFFFFFU /* UINT32_MAX */
/* TODO remove this if t1->colflags_size type changes to size_t */
/* Overflow check */
if (colflags_size > (size_t)0xFFFFFFFFU /* UINT32_MAX */) {
/* FIXME event manager error callback */
return OPJ_FALSE;
}
#endif
t1->colflags_size = (OPJ_UINT32)colflags_size;
}
memset(t1->colflags,0,colflags_size * sizeof(opj_colflag_t));
memset(t1->colflags, 0, colflags_size * sizeof(opj_colflag_t));
}
t1->w=w;
t1->h=h;
t1->w = w;
t1->h = h;
return OPJ_TRUE;
}