From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ Upstream commit 87355b7c3da9bfd81935caba0ab763355147f7b0 ]
Add check for the return value of skb_copy in order to avoid NULL pointer dereference.
Fixes: 2cd548566384 ("net: dsa: qca8k: add support for phy read/write with mgmt Ethernet") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Reviewed-by: Pavan Chebbi pavan.chebbi@broadcom.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/qca/qca8k-8xxx.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c index 7a6166a0c9bcc..b3f7988668996 100644 --- a/drivers/net/dsa/qca/qca8k-8xxx.c +++ b/drivers/net/dsa/qca/qca8k-8xxx.c @@ -469,6 +469,9 @@ qca8k_phy_eth_busy_wait(struct qca8k_mgmt_eth_data *mgmt_eth_data, bool ack; int ret;
+ if (!skb) + return -ENOMEM; + reinit_completion(&mgmt_eth_data->rw_done);
/* Increment seq_num and set it in the copy pkt */