tools/firewire: nosy-dump: check for allocation failure

Behavior of null pointer dereference is undefined in the C language.
Portably implement the desired behavior.

Reported-by: Yang Yeping <yangyeping_666@hotmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/firewire/nosy-dump.c b/tools/firewire/nosy-dump.c
index f93b776370b..3179c711bd6 100644
--- a/tools/firewire/nosy-dump.c
+++ b/tools/firewire/nosy-dump.c
@@ -150,6 +150,8 @@ subaction_create(uint32_t *data, size_t length)
 
         /* we put the ack in the subaction struct for easy access. */
         sa = malloc(sizeof *sa - sizeof sa->packet + length);
+        if (!sa)
+                exit(EXIT_FAILURE);
         sa->ack = data[length / 4 - 1];
         sa->length = length;
         memcpy(&sa->packet, data, length);
@@ -180,6 +182,8 @@ link_transaction_lookup(int request_node, int response_node, int tlabel)
         }
 
         t = malloc(sizeof *t);
+        if (!t)
+                exit(EXIT_FAILURE);
         t->request_node = request_node;
         t->response_node = response_node;
         t->tlabel = tlabel;