The pointer cmdlines need to be explicity freed in case the
realloc() fails. Fix it by adding a free() if realloc()
returns a NULL pointer.

Signed-off-by: Gaurav Singh <[email protected]>
---
 tools/lib/traceevent/event-parse.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c 
b/tools/lib/traceevent/event-parse.c
index e1bd2a93c6db..7f0133420931 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -284,12 +284,13 @@ static int add_new_comm(struct tep_handle *tep,
                return 0;
        }
 
-       cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (tep->cmdline_count + 
1));
-       if (!cmdlines) {
+       struct tep_cmdline *new_cmdlines = realloc(cmdlines, sizeof(*cmdlines) 
* (tep->cmdline_count + 1));
+       if (!new_cmdlines) {
+               free(cmdlines);
                errno = ENOMEM;
                return -1;
        }
-       tep->cmdlines = cmdlines;
+       tep->cmdlines = new_cmdlines;
 
        key.comm = strdup(comm);
        if (!key.comm) {
-- 
2.17.1

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