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| author | Zhao Dongdong <zhaodongdong@kylinos.cn> | 2026-05-26 11:21:39 +0800 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2026-05-27 16:44:02 -0400 |
| commit | 3c40d381ce04f9575a5d8b542898183c3b4b38dc (patch) | |
| tree | 0a8fd859ef2298f657365e4bc5d135bdf4b4cf3c | |
| parent | 82855073c1081732656734b74d7d1d5e4cfd0da7 (diff) | |
| download | linux-next-3c40d381ce04f9575a5d8b542898183c3b4b38dc.tar.gz linux-next-3c40d381ce04f9575a5d8b542898183c3b4b38dc.zip | |
Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt()
The skb_clone() function can return NULL if memory allocation fails.
send_mcast_pkt() calls skb_clone() without checking the return value, which
can lead to a NULL pointer dereference in send_pkt() when it dereferences
skb->data.
Add a NULL check after skb_clone() and skip the peer if the clone fails.
Fixes: 18722c247023 ("Bluetooth: Enable 6LoWPAN support for BT LE devices")
Signed-off-by: Zhao Dongdong <zhaodongdong@kylinos.cn>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
| -rw-r--r-- | net/bluetooth/6lowpan.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index 2f03b780b40d..960a19b3e26d 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -486,6 +486,8 @@ static int send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev) int ret; local_skb = skb_clone(skb, GFP_ATOMIC); + if (!local_skb) + continue; BT_DBG("xmit %s to %pMR type %u IP %pI6c chan %p", netdev->name, |