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Fix warnings from recent overflow checks 

see #832
This commit is contained in:
Antonin Descampe 2016-09-16 17:48:20 +02:00
parent d8ae42d808
commit 25966346f7
2 changed files with 27 additions and 24 deletions
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21
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 rw; /* width of the resolution level computed */
OPJ_INT32 rh; /* height 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_cur_res = 0;
opj_tcd_resolution_t * l_last_res = 0; opj_tcd_resolution_t * l_last_res = 0;
@ -410,12 +410,13 @@ static INLINE OPJ_BOOL opj_dwt_encode_procedure(opj_tcd_tilecomp_t * tilec,void
l_data_size = opj_dwt_max_resolution(tilec->resolutions, tilec->numresolutions); l_data_size = opj_dwt_max_resolution(tilec->resolutions, tilec->numresolutions);
/* overflow check */ /* overflow check */
if ((size_t)l_data_size > (SIZE_MAX / sizeof(OPJ_INT32))) { if (l_data_size > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
bj = (OPJ_INT32*)opj_malloc((size_t)l_data_size * sizeof(OPJ_INT32)); 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 */ /* l_data_size is equal to 0 when numresolutions == 1 but bj is not used */
/* in that case, so do not error out */ /* in that case, so do not error out */
if (l_data_size != 0 && ! bj) { if (l_data_size != 0 && ! bj) {
@ -578,7 +579,7 @@ static OPJ_BOOL opj_dwt_decode_tile(opj_tcd_tilecomp_t* tilec, OPJ_UINT32 numres
OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0); OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0);
OPJ_UINT32 mr; /* max resolution */ size_t mr; /* max resolution */
if (numres == 1U) { if (numres == 1U) {
return OPJ_TRUE; return OPJ_TRUE;
@ -587,12 +588,13 @@ static OPJ_BOOL opj_dwt_decode_tile(opj_tcd_tilecomp_t* tilec, OPJ_UINT32 numres
mr = opj_dwt_max_resolution(tr, numres); mr = opj_dwt_max_resolution(tr, numres);
/* overflow check */ /* overflow check */
if ((size_t)mr > (SIZE_MAX / sizeof(OPJ_INT32))) { if (mr > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
h.mem = (OPJ_INT32*)opj_aligned_malloc((size_t)mr * sizeof(OPJ_INT32)); mr *= sizeof(OPJ_INT32);
h.mem = (OPJ_INT32*)opj_aligned_malloc(mr);
if (! h.mem){ if (! h.mem){
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
@ -865,7 +867,7 @@ OPJ_BOOL opj_dwt_decode_real(opj_tcd_tilecomp_t* OPJ_RESTRICT tilec, OPJ_UINT32
OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0); OPJ_UINT32 w = (OPJ_UINT32)(tilec->x1 - tilec->x0);
OPJ_UINT32 mr; /* max resolution */ size_t mr; /* max resolution */
mr = opj_dwt_max_resolution(res, numres); mr = opj_dwt_max_resolution(res, numres);
@ -876,12 +878,13 @@ OPJ_BOOL opj_dwt_decode_real(opj_tcd_tilecomp_t* OPJ_RESTRICT tilec, OPJ_UINT32
} }
mr += 5U; mr += 5U;
if ((size_t)mr > (SIZE_MAX / sizeof(opj_v4_t))) { if (mr > (SIZE_MAX / sizeof(opj_v4_t))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
h.wavelet = (opj_v4_t*) opj_aligned_malloc((size_t)mr * sizeof(opj_v4_t)); mr *= sizeof(opj_v4_t);
h.wavelet = (opj_v4_t*) opj_aligned_malloc(mr);
if (!h.wavelet) { if (!h.wavelet) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;

28
src/lib/openjp2/t1.c
View File

@ -1166,37 +1166,37 @@ static OPJ_BOOL opj_t1_allocate_buffers(
OPJ_UINT32 w, OPJ_UINT32 w,
OPJ_UINT32 h) OPJ_UINT32 h)
{ {
OPJ_UINT32 flagssize; size_t flagssize;
/* encoder uses tile buffer, so no need to allocate */ /* encoder uses tile buffer, so no need to allocate */
if (!t1->encoder) { if (!t1->encoder) {
OPJ_UINT32 datasize; size_t datasize;
/* Overflow check */ /* Overflow check */
if ((w > 0U) && (h > (0xFFFFFFFFU /* UINT32_MAX */ / w))) { if ((w > 0U) && (h > (0xFFFFFFFFU /* UINT32_MAX */ / w))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
datasize = w * h; datasize = (size_t) w * h;
/* Overflow check */ /* Overflow check */
if ((size_t)datasize > (SIZE_MAX / sizeof(OPJ_INT32))) { if (datasize > (SIZE_MAX / sizeof(OPJ_INT32))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
if(datasize > t1->datasize){ if(datasize > (size_t) t1->datasize){
opj_aligned_free(t1->data); opj_aligned_free(t1->data);
t1->data = (OPJ_INT32*) opj_aligned_malloc((size_t)datasize * sizeof(OPJ_INT32)); t1->data = (OPJ_INT32*) opj_aligned_malloc(datasize * sizeof(OPJ_INT32));
if(!t1->data){ if(!t1->data){
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
t1->datasize = datasize; t1->datasize = (OPJ_UINT32) datasize;
} }
/* memset first arg is declared to never be null by gcc */ /* memset first arg is declared to never be null by gcc */
if (t1->data != NULL) { if (t1->data != NULL) {
memset(t1->data, 0, (size_t)datasize * sizeof(OPJ_INT32)); memset(t1->data, 0, datasize * sizeof(OPJ_INT32));
} }
} }
@ -1210,24 +1210,24 @@ static OPJ_BOOL opj_t1_allocate_buffers(
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
flagssize = t1->flags_stride * (h + 2U); flagssize = (size_t) t1->flags_stride * (h + 2U);
/* Overflow check */ /* Overflow check */
if ((size_t)flagssize > (SIZE_MAX / sizeof(opj_flag_t))) { if (flagssize > (SIZE_MAX / sizeof(opj_flag_t))) {
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
if(flagssize > t1->flagssize){ if(flagssize > (size_t) t1->flagssize){
opj_aligned_free(t1->flags); opj_aligned_free(t1->flags);
t1->flags = (opj_flag_t*) opj_aligned_malloc((size_t)flagssize * sizeof(opj_flag_t)); t1->flags = (opj_flag_t*) opj_aligned_malloc(flagssize * sizeof(opj_flag_t));
if(!t1->flags){ if(!t1->flags){
/* FIXME event manager error callback */ /* FIXME event manager error callback */
return OPJ_FALSE; return OPJ_FALSE;
} }
t1->flagssize = flagssize; t1->flagssize = (OPJ_UINT32) flagssize;
} }
memset(t1->flags, 0, (size_t)flagssize * sizeof(opj_flag_t)); memset(t1->flags, 0, flagssize * sizeof(opj_flag_t));
t1->w = w; t1->w = w;
t1->h = h; t1->h = h;