Fix: miscellaneous memory handling fixes

[lttng-tools.git] / src / bin / lttng-sessiond / kernel.c

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index 9e7826808f7181b9546de2d69956e1820e6515c4..b6b24a5a2b2b426fc78845bb8ca4bf7b1f16770a 100644 (file)
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -602,7 +602,7 @@ error:
  */
 ssize_t kernel_list_events(int tracer_fd, struct lttng_event **events)
 {
-       int fd, pos, ret;
+       int fd, ret;
        char *event;
        size_t nbmem, count = 0;
        FILE *fp;
@@ -634,15 +634,15 @@ ssize_t kernel_list_events(int tracer_fd, struct lttng_event **events)
                goto end;
        }
 
-       while (fscanf(fp, "event { name = %m[^;]; };%n\n", &event, &pos) == 1) {
+       while (fscanf(fp, "event { name = %m[^;]; };\n", &event) == 1) {
                if (count >= nbmem) {
                        struct lttng_event *new_elist;
+                       size_t new_nbmem;
 
-                       DBG("Reallocating event list from %zu to %zu bytes", nbmem,
-                                       nbmem * 2);
-                       /* Double the size */
-                       nbmem <<= 1;
-                       new_elist = realloc(elist, nbmem * sizeof(struct lttng_event));
+                       new_nbmem = nbmem << 1;
+                       DBG("Reallocating event list from %zu to %zu bytes",
+                                       nbmem, new_nbmem);
+                       new_elist = realloc(elist, new_nbmem * sizeof(struct lttng_event));
                        if (new_elist == NULL) {
                                PERROR("realloc list events");
                                free(event);
@@ -650,6 +650,10 @@ ssize_t kernel_list_events(int tracer_fd, struct lttng_event **events)
                                count = -ENOMEM;
                                goto end;
                        }
+                       /* Zero the new memory */
+                       memset(new_elist + nbmem, 0,
+                               (new_nbmem - nbmem) * sizeof(struct lttng_event));
+                       nbmem = new_nbmem;
                        elist = new_elist;
                }
                strncpy(elist[count].name, event, LTTNG_SYMBOL_NAME_LEN);