trace-cmd: Zero out item_arg in process_paran

The print arg gets its fields processed the first time they are used.
If the field is not initialized to zero, this will cause it to
use an uninitialized field and crash.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/parse-events.c b/parse-events.c
index 24ecb85..eabce41 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -1998,6 +1998,7 @@ process_paren(struct event_format *event, struct print_arg *arg, char **tok)
                         die("previous needed to be PRINT_ATOM");
 
                 item_arg = malloc_or_die(sizeof(*item_arg));
+                memset(item_arg, 0, sizeof(*item_arg));
 
                 arg->type = PRINT_TYPE;
                 arg->typecast.type = arg->atom.atom;