diff --git a/cmd/zpios/zpios_main.c b/cmd/zpios/zpios_main.c
index a413453e47..9110488fbe 100644
--- a/cmd/zpios/zpios_main.c
+++ b/cmd/zpios/zpios_main.c
@@ -550,7 +550,8 @@ run_one(cmd_args_t *args, uint32_t id, uint32_t T, uint32_t N,
 	print_stats(args, cmd);
 
 	if (args->verbose) {
-		rc2 = read(zpiosctl_fd, zpios_buffer, zpios_buffer_size - 1);
+		rc2 = read(zpiosctl_fd, zpios_buffer, zpios_buffer_size);
+		zpios_buffer[zpios_buffer_size - 1] = '\0';
 		if (rc2 < 0) {
 			fprintf(stdout, "Error reading results: %d\n", rc2);
 		} else if ((rc2 > 0) && (strlen(zpios_buffer) > 0)) {
diff --git a/tests/zfs-tests/tests/functional/ctime/ctime_001_pos.c b/tests/zfs-tests/tests/functional/ctime/ctime_001_pos.c
index 4052b5e0b6..73528d21d2 100644
--- a/tests/zfs-tests/tests/functional/ctime/ctime_001_pos.c
+++ b/tests/zfs-tests/tests/functional/ctime/ctime_001_pos.c
@@ -154,7 +154,8 @@ do_link(const char *pfile)
 		return (-1);
 	}
 
-	strcpy(pfile_copy, pfile);
+	strncpy(pfile_copy, pfile, sizeof (pfile_copy));
+	pfile_copy[sizeof (pfile_copy) - 1] = '\0';
 	/*
 	 * Figure out source file directory name, and create
 	 * the link file in the same directory.