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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     MichelleJin <shjy180909@gmail.com>,
        Johannes Berg <johannes.berg@intel.com>,
        Sasha Levin <sashal@kernel.org>, johannes@sipsolutions.net,
        davem@davemloft.net, kuba@kernel.org,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.14 26/40] mac80211: check return value of rhashtable_init
Date:   Tue,  5 Oct 2021 09:50:05 -0400
Message-Id: <20211005135020.214291-26-sashal@kernel.org>
In-Reply-To: <20211005135020.214291-1-sashal@kernel.org>
References: <20211005135020.214291-1-sashal@kernel.org>
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From: MichelleJin <shjy180909@gmail.com>

[ Upstream commit 111461d573741c17eafad029ac93474fa9adcce0 ]

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 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index efbefcbac3ac..7cab1cf09bf1 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -60,7 +60,10 @@ 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;
 }
-- 
2.33.0