diff -pru jasper-1.900.1.orig/src/libjasper/base/jas_image.c jasper-1.900.1/src/libjasper/base/jas_image.c
--- jasper-1.900.1.orig/src/libjasper/base/jas_image.c	2016-02-01 14:53:56.000000000 +0100
+++ jasper-1.900.1/src/libjasper/base/jas_image.c	2016-02-01 21:49:58.746006339 +0100
@@ -433,6 +433,10 @@ int jas_image_readcmpt(jas_image_t *imag
 		return -1;
 	}
 
+	if (!data->rows_) {
+		return -1;
+	}
+
 	if (jas_matrix_numrows(data) != height || jas_matrix_numcols(data) != width) {
 		if (jas_matrix_resize(data, height, width)) {
 			return -1;
@@ -486,6 +490,10 @@ int jas_image_writecmpt(jas_image_t *ima
 		return -1;
 	}
 
+	if (!data->rows_) {
+		return -1;
+	}
+
 	if (jas_matrix_numrows(data) != height || jas_matrix_numcols(data) != width) {
 		return -1;
 	}
diff -pru jasper-1.900.1.orig/src/libjasper/base/jas_seq.c jasper-1.900.1/src/libjasper/base/jas_seq.c
--- jasper-1.900.1.orig/src/libjasper/base/jas_seq.c	2016-02-01 14:53:56.000000000 +0100
+++ jasper-1.900.1/src/libjasper/base/jas_seq.c	2016-02-01 21:53:45.149193159 +0100
@@ -266,6 +266,10 @@ void jas_matrix_divpow2(jas_matrix_t *ma
 	int rowstep;
 	jas_seqent_t *data;
 
+	if (!matrix->rows_) {
+		return;
+	}
+
 	rowstep = jas_matrix_rowstep(matrix);
 	for (i = matrix->numrows_, rowstart = matrix->rows_[0]; i > 0; --i,
 	  rowstart += rowstep) {
@@ -286,6 +290,10 @@ void jas_matrix_clip(jas_matrix_t *matri
 	jas_seqent_t *data;
 	int rowstep;
 
+	if (!matrix->rows_) {
+		return;
+	}
+
 	rowstep = jas_matrix_rowstep(matrix);
 	for (i = matrix->numrows_, rowstart = matrix->rows_[0]; i > 0; --i,
 	  rowstart += rowstep) {
@@ -310,6 +318,10 @@ void jas_matrix_asr(jas_matrix_t *matrix
 	int rowstep;
 	jas_seqent_t *data;
 
+	if (!matrix->rows_) {
+		return;
+	}
+
 	assert(n >= 0);
 	rowstep = jas_matrix_rowstep(matrix);
 	for (i = matrix->numrows_, rowstart = matrix->rows_[0]; i > 0; --i,
@@ -329,6 +341,10 @@ void jas_matrix_asl(jas_matrix_t *matrix
 	int rowstep;
 	jas_seqent_t *data;
 
+	if (!matrix->rows_) {
+		return;
+	}
+
 	rowstep = jas_matrix_rowstep(matrix);
 	for (i = matrix->numrows_, rowstart = matrix->rows_[0]; i > 0; --i,
 	  rowstart += rowstep) {
@@ -371,6 +387,10 @@ void jas_matrix_setall(jas_matrix_t *mat
 	int rowstep;
 	jas_seqent_t *data;
 
+	if (!matrix->rows_) {
+		return;
+	}
+
 	rowstep = jas_matrix_rowstep(matrix);
 	for (i = matrix->numrows_, rowstart = matrix->rows_[0]; i > 0; --i,
 	  rowstart += rowstep) {