mac80211: check return value of rhashtable_init

[ Upstream commit 111461d5 ]

When rhashtable_init() fails, it returns -EINVAL.
However, since error return value of rhashtable_init is not checked,
it can cause use of uninitialized pointers.
So, fix unhandled errors of rhashtable_init.

Signed-off-by: MichelleJin <shjy180909@gmail.com>
Link: https://lore.kernel.org/r/20210927033457.1020967-4-shjy180909@gmail.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net/mac80211/mesh_pathtbl.c

@@ -63,7 +63,10 @@ static struct mesh_table *mesh_table_alloc(void)
 	atomic_set(&newtbl->entries,  0);
 	spin_lock_init(&newtbl->gates_lock);
 	spin_lock_init(&newtbl->walk_lock);
-	rhashtable_init(&newtbl->rhead, &mesh_rht_params);
+	if (rhashtable_init(&newtbl->rhead, &mesh_rht_params)) {
+		kfree(newtbl);
+		return NULL;
+	}
 
 	return newtbl;
 }