From nobody Fri Dec 19 16:10:17 2025 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DDE261DACB8; Sat, 24 May 2025 07:59:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748073551; cv=none; b=uVcUJfzUT3xx0WJd2BQSDk2VMblNTiD4z8MwhE9iZKl1QPuiVLIX0NeU9UqMoIOTAppGCln89HdBbrL1em0OTGsA8duFkwfxRT2F8JZ5XgEHtSGJalzDJVGmUkw7QdMf/M1E6ed85E4nZNQcNOCqL437hX4Hj+hpf2aBUQDgbkU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748073551; c=relaxed/simple; bh=9jUiIHXZ/mYOiN0HsPPoU1jm3Nz1asDBthDRQBZE+DA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=MR5HIshYd9EnJfKlCon77MYQzv3qIqoxMXYlkHSt6jokY2aqe6XKoFBIxmL+FOSRkIDmWnGRyrW+RPlKddY4JdWKvh3QEprQmzYAWRVczfL3Re7DEaUcgCWl6nhpLfAJdJl7OVXchm7daUFZhaC9dd4Wgsr8KEQOmPzFT+g/N60= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=OTFsLv76; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="OTFsLv76" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=6i /ZtaCjfDaeiMffEFfk5xTWqg3WcPt0s/962umeTPA=; b=OTFsLv76iaWjUqnIgi HnlfXQxD4sx6t1vsw5J14YLrYfWEgoEvHXMM3UtDkuCsLnfqWmRnTx7Cf620dgyy sxEvKQA7zvwyOIVy/MUpA9RUOTzDQCqgfYCWnDPzcDjxuqzbbwrBRxx5Zhh+Fqg9 MBU4E5JIlKN8dEMZGu5ZH4Gbw= Received: from icess-ProLiant-DL380-Gen10.. (unknown []) by gzga-smtp-mtada-g1-1 (Coremail) with SMTP id _____wDn7x4ifDFoCLuUDg--.5328S4; Sat, 24 May 2025 15:58:28 +0800 (CST) From: Haoxiang Li To: niklas.soderlund@ragnatech.se, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, richardcochran@gmail.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Haoxiang Li , stable@vger.kernel.org Subject: [PATCH] net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe() Date: Sat, 24 May 2025 15:58:25 +0800 Message-Id: <20250524075825.3589001-1-haoxiang_li2024@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDn7x4ifDFoCLuUDg--.5328S4 X-Coremail-Antispam: 1Uf129KBjvdXoW7JryxZF18GF4fuF4xCw43trb_yoWfZFc_KF 12vF4fXr4qyr1qkw18Kw43u34ayr1kXr9YvFsrtrZIqay7ur1rXFZ8ZF9xJr1UWrn5CF9r ZrnIya1xA34avjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRNvtCUUUUUU== X-CM-SenderInfo: xkdr5xpdqjszblsqjki6rwjhhfrp/xtbB0g1XbmgxdoGcTQAAsZ Content-Type: text/plain; charset="utf-8" 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 S=C3=B6derlund --- drivers/net/ethernet/renesas/rtsn.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/renesas/rtsn.c b/drivers/net/ethernet/ren= esas/rtsn.c index 6b3f7fca8d15..f5df3374d279 100644 --- a/drivers/net/ethernet/renesas/rtsn.c +++ b/drivers/net/ethernet/renesas/rtsn.c @@ -1260,6 +1260,10 @@ static int rtsn_probe(struct platform_device *pdev) priv->pdev =3D pdev; priv->ndev =3D ndev; priv->ptp_priv =3D rcar_gen4_ptp_alloc(pdev); + if (!priv->ptp_priv) { + ret =3D -ENOMEM; + goto error_free; + } =20 spin_lock_init(&priv->lock); platform_set_drvdata(pdev, priv); --=20 2.25.1