Messages in this thread Patch in this message | | | From | Jiasheng Jiang <> | Subject | [PATCH 2/2] Bluetooth: 6LoWPAN: Add missing check for skb_clone | Date | Mon, 20 Mar 2023 14:31:56 +0800 |
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Add the check for the return value of skb_clone since it may return NULL pointer and cause NULL pointer dereference in send_pkt.
Fixes: 18722c247023 ("Bluetooth: Enable 6LoWPAN support for BT LE devices") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- net/bluetooth/6lowpan.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index bd6dbca5747f..3d4ef94405f8 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -475,6 +475,10 @@ static int send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev) list_for_each_entry_rcu(pentry, &dev->peers, list) { local_skb = skb_clone(skb, GFP_ATOMIC); + if (!local_skb) { + err = -ENOMEM; + goto out; + } BT_DBG("xmit %s to %pMR type %u IP %pI6c chan %p", netdev->name, -- 2.25.1
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