Merge pull request #832 from mayeut/overflow-check

Add overflow checks for opj_aligned_malloc

src/lib/openjp2/dwt.c

@@ -407,11 +407,19 @@ 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);
+	l_data_size = opj_dwt_max_resolution(tilec->resolutions, tilec->numresolutions);
-	bj = (OPJ_INT32*)opj_malloc((size_t)l_data_size);
+ 
+	/* overflow check */
+	if ((size_t)l_data_size > (SIZE_MAX / sizeof(OPJ_INT32))) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+
+	bj = (OPJ_INT32*)opj_malloc((size_t)l_data_size * sizeof(OPJ_INT32));
 	/* 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) {
+		/* FIXME event manager error callback */
 		return OPJ_FALSE;
 	}
 	i = l;
@@ -570,10 +578,21 @@ 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 mr; /* max resolution */
+	
 	if (numres == 1U) {
 		return OPJ_TRUE;
 	}
-	h.mem = (OPJ_INT32*)opj_aligned_malloc(opj_dwt_max_resolution(tr, numres) * sizeof(OPJ_INT32));
+	
+	mr = opj_dwt_max_resolution(tr, numres);
+	
+	/* overflow check */
+	if ((size_t)mr > (SIZE_MAX / sizeof(OPJ_INT32))) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+	
+	h.mem = (OPJ_INT32*)opj_aligned_malloc((size_t)mr * sizeof(OPJ_INT32));
 	if (! h.mem){
 		/* FIXME event manager error callback */
 		return OPJ_FALSE;
@@ -846,7 +865,23 @@ 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));
+	OPJ_UINT32 mr; /* max resolution */
+	
+	mr = opj_dwt_max_resolution(res, numres);
+	
+	/* overflow check */
+	if (mr > (0xFFFFFFFFU /* UINT32_MAX */ - 5U)) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+	mr += 5U;
+	
+	if ((size_t)mr > (SIZE_MAX / sizeof(opj_v4_t))) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+
+	h.wavelet = (opj_v4_t*) opj_aligned_malloc((size_t)mr * sizeof(opj_v4_t));
 	if (!h.wavelet) {
 		/* FIXME event manager error callback */
 		return OPJ_FALSE;

src/lib/openjp2/pi.c

@@ -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
+	if (!l_current_pi->include)
-		(!l_current_pi->include)
 	{
 		opj_free(l_tmp_data);
 		opj_free(l_tmp_ptr);

src/lib/openjp2/t1.c

@@ -1166,14 +1166,28 @@ 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) {
+		OPJ_UINT32 datasize;
+		
+		/* Overflow check */
+		if ((w > 0U) && (h > (0xFFFFFFFFU /* UINT32_MAX */ / w))) {
+			/* FIXME event manager error callback */
+			return OPJ_FALSE;
+		}
+		datasize = w * h;
+		
+		/* Overflow check */
+		if ((size_t)datasize > (SIZE_MAX / sizeof(OPJ_INT32))) {
+			/* FIXME event manager error callback */
+			return OPJ_FALSE;
+		}
+		
 		if(datasize > t1->datasize){
 			opj_aligned_free(t1->data);
-			t1->data = (OPJ_INT32*) opj_aligned_malloc(datasize * sizeof(OPJ_INT32));
+			t1->data = (OPJ_INT32*) opj_aligned_malloc((size_t)datasize * sizeof(OPJ_INT32));
 			if(!t1->data){
 				/* FIXME event manager error callback */
 				return OPJ_FALSE;
@@ -1182,22 +1196,38 @@ static OPJ_BOOL opj_t1_allocate_buffers(
 		}
 		/* 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, (size_t)datasize * sizeof(OPJ_INT32));
 		}
 	}
-	t1->flags_stride=w+2;
+	
-	flagssize=t1->flags_stride * (h+2);
+	if ((w > (0xFFFFFFFFU /* UINT32_MAX */ - 2U)) || (h > (0xFFFFFFFFU /* UINT32_MAX */ - 2U))) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+	
+	t1->flags_stride = w + 2U; /* can't be 0U */
+	if ((h + 2U) > (0xFFFFFFFFU /* UINT32_MAX */ / t1->flags_stride)) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
+	flagssize = t1->flags_stride * (h + 2U);
+
+	/* Overflow check */
+	if ((size_t)flagssize > (SIZE_MAX / sizeof(opj_flag_t))) {
+		/* FIXME event manager error callback */
+		return OPJ_FALSE;
+	}
 	
 	if(flagssize > t1->flagssize){
 		opj_aligned_free(t1->flags);
-		t1->flags = (opj_flag_t*) opj_aligned_malloc(flagssize * sizeof(opj_flag_t));
+		t1->flags = (opj_flag_t*) opj_aligned_malloc((size_t)flagssize * sizeof(opj_flag_t));
 		if(!t1->flags){
 			/* FIXME event manager error callback */
 			return OPJ_FALSE;
 		}
 		t1->flagssize = flagssize;
 	}
-	memset(t1->flags,0,flagssize * sizeof(opj_flag_t));
+	memset(t1->flags, 0, (size_t)flagssize * sizeof(opj_flag_t));
 
 	t1->w = w;
 	t1->h = h;