[PATCH XENSTORE v1 01/10] xenstore: add missing NULL check

[Norbert Manthey <nmanthey@xxxxxxxxx>]

In case of allocation error, we should not dereference the obtained
NULL pointer. Hence, fail early.

This bug was discovered and resolved using Coverity Static Analysis
Security Testing (SAST) by Synopsys, Inc.

Signed-off-by: Norbert Manthey <nmanthey@xxxxxxxxx>
Reviewed-by: Thomas Friebel <friebelt@xxxxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxxxx>

---
 tools/xenstore/xenstored_core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
--- a/tools/xenstore/xenstored_core.c
+++ b/tools/xenstore/xenstored_core.c
@@ -1818,6 +1818,10 @@ static int check_store_(const char *name, struct 
hashtable *reachable)
 
                struct hashtable * children =
                        create_hashtable(16, hash_from_key_fn, keys_equal_fn);
+               if (!children) {
+                       log("check_store create table: ENOMEM");
+                       return ENOMEM;
+               }
 
                if (!remember_string(reachable, name)) {
                        hashtable_destroy(children, 0);
-- 
2.17.1




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