From: Haoxiang Li Date: Thu, 3 Jul 2025 10:01:09 +0000 (+0800) Subject: net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe() X-Git-Tag: v6.16-rc6~18^2~15 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=95a234f6affbf51f06338383537ab80d637bb785;p=thirdparty%2Fkernel%2Flinux.git net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe() Add check for the return value of rcar_gen4_ptp_alloc() to prevent potential null pointer dereference. Fixes: b0d3969d2b4d ("net: ethernet: rtsn: Add support for Renesas Ethernet-TSN") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li Reviewed-by: Niklas Söderlund Link: https://patch.msgid.link/20250703100109.2541018-1-haoxiang_li2024@163.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/renesas/rtsn.c b/drivers/net/ethernet/renesas/rtsn.c index 6b3f7fca8d157..05c4b6c8c9c3d 100644 --- a/drivers/net/ethernet/renesas/rtsn.c +++ b/drivers/net/ethernet/renesas/rtsn.c @@ -1259,7 +1259,12 @@ static int rtsn_probe(struct platform_device *pdev) priv = netdev_priv(ndev); priv->pdev = pdev; priv->ndev = ndev; + priv->ptp_priv = rcar_gen4_ptp_alloc(pdev); + if (!priv->ptp_priv) { + ret = -ENOMEM; + goto error_free; + } spin_lock_init(&priv->lock); platform_set_drvdata(pdev, priv);