Fix: liblttng-ctl: unreported truncations when copying strings

[lttng-tools.git] / src / lib / lttng-ctl / rotate.c

diff --git a/src/lib/lttng-ctl/rotate.c b/src/lib/lttng-ctl/rotate.c
index d9871dc9d3e9f6c651126f917d765321adc116f2..1002e230b64e504b55583e1770aa49b42d38a88c 100644 (file)
--- a/src/lib/lttng-ctl/rotate.c
+++ b/src/lib/lttng-ctl/rotate.c
@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
  *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * This library is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #define _LGPL_SOURCE
@@ -229,11 +219,14 @@ int lttng_rotate_session(const char *session_name,
 
        memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_ROTATE_SESSION;
-       lttng_ctl_copy_string(lsm.session.name, session_name,
-                       sizeof(lsm.session.name));
+
+       ret = lttng_strncpy(lsm.session.name, session_name,
+                           sizeof(lsm.session.name));
+       /* Source length already validated. */
+       assert(ret == 0);
 
        ret = lttng_ctl_ask_sessiond(&lsm, (void **) &rotate_return);
-       if (ret < 0) {
+       if (ret <= 0) {
                *rotation_handle = NULL;
                goto end;
        }
@@ -292,36 +285,42 @@ enum lttng_rotation_status lttng_rotation_update_schedule(
 
        memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_ROTATION_SET_SCHEDULE;
-       lttng_ctl_copy_string(lsm.session.name, session_name,
+       ret = lttng_strncpy(lsm.session.name, session_name,
                        sizeof(lsm.session.name));
+       /* Source length already validated. */
+       assert(ret == 0);
 
        lsm.u.rotation_set_schedule.type = (uint32_t) schedule->type;
        switch (schedule->type) {
        case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
        {
+               uint64_t threshold;
+
                status = lttng_rotation_schedule_size_threshold_get_threshold(
-                               schedule, &lsm.u.rotation_set_schedule.value);
+                               schedule, &threshold);
                if (status != LTTNG_ROTATION_STATUS_OK) {
                        if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
                                status = LTTNG_ROTATION_STATUS_INVALID;
                        }
                        goto end;
                }
-
+               lsm.u.rotation_set_schedule.value = threshold;
                lsm.u.rotation_set_schedule.set = !!add;
                break;
        }
        case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
        {
+               uint64_t period;
+
                status = lttng_rotation_schedule_periodic_get_period(
-                               schedule, &lsm.u.rotation_set_schedule.value);
+                               schedule, &period);
                if (status != LTTNG_ROTATION_STATUS_OK) {
                        if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
                                status = LTTNG_ROTATION_STATUS_INVALID;
                        }
                        goto end;
                }
-
+               lsm.u.rotation_set_schedule.value = period;
                lsm.u.rotation_set_schedule.set = !!add;
                break;
        }
@@ -368,14 +367,23 @@ int get_schedules(const char *session_name,
 {
        int ret;
        struct lttcomm_session_msg lsm;
-       struct lttng_session_list_schedules_return *schedules_comm;
+       struct lttng_session_list_schedules_return *schedules_comm = NULL;
        struct lttng_rotation_schedules *schedules = NULL;
        struct lttng_rotation_schedule *periodic = NULL, *size = NULL;
 
+       if (!session_name) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
+
        memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_SESSION_LIST_ROTATION_SCHEDULES;
-       lttng_ctl_copy_string(lsm.session.name, session_name,
+       ret = lttng_strncpy(lsm.session.name, session_name,
                        sizeof(lsm.session.name));
+       if (ret) {
+               ret = -LTTNG_ERR_INVALID;
+               goto end;
+       }
 
        ret = lttng_ctl_ask_sessiond(&lsm, (void **) &schedules_comm);
        if (ret < 0) {