Index: apps/app_voicemail.c
===================================================================
--- apps/app_voicemail.c	(revision 402349)
+++ apps/app_voicemail.c	(working copy)
@@ -3736,14 +3736,18 @@
 					}
 					/* Read out in small chunks */
 					for (offset = 0; offset < colsize2; offset += CHUNKSIZE) {
-						if ((fdm = mmap(NULL, CHUNKSIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, offset)) == MAP_FAILED) {
+						unsigned chunksize = CHUNKSIZE;
+						if (offset + chunksize > fdlen) {
+							chunksize = fdlen - offset;
+						}
+						if ((fdm = mmap(NULL, chunksize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, offset)) == MAP_FAILED) {
 							ast_log(AST_LOG_WARNING, "Could not mmap the output file: %s (%d)\n", strerror(errno), errno);
 							SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 							ast_odbc_release_obj(obj);
 							goto yuck;
 						} else {
-							res = SQLGetData(stmt, x + 1, SQL_BINARY, fdm, CHUNKSIZE, NULL);
-							munmap(fdm, CHUNKSIZE);
+							res = SQLGetData(stmt, x + 1, SQL_BINARY, fdm, chunksize, NULL);
+							munmap(fdm, chunksize);
 							if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 								ast_log(AST_LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
 								unlink(full_fn);