Fix: unchecked access to pids array

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index c8d60cddcaee5e5bd9e2323c680c5dc710104cfc..d8e2f1428df7fc27560b532c5b3c41ca478c60f8 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -2744,6 +2744,9 @@ int lttng_list_tracker_pids(struct lttng_handle *handle,
                return ret;
        }
        nr_pids = ret / sizeof(int32_t);
                return ret;
        }
        nr_pids = ret / sizeof(int32_t);

+       if (nr_pids > 0 && !pids) {
+               return -LTTNG_ERR_UNK;
+       }

        if (nr_pids == 1 && pids[0] == -1) {
                free(pids);
                pids = NULL;
        if (nr_pids == 1 && pids[0] == -1) {
                free(pids);
                pids = NULL;