From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EAF81C03 for ; Mon, 20 Mar 2023 15:08:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F237CC433EF; Mon, 20 Mar 2023 15:08:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679324939; bh=WKWGOh7P8dwbtyzqCjRU4JbokhqyWKBW6VLePktxMuI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cPiki6vqwxxDIAUXaG7gP720tvZMEXG/vcC3f/QJ8IWeL2M/9RSLF1UBh5Jw9Mgct ojT3neVRqJCYArKQfSLqosjoMGL0G240cY32YVVvxkqYwuuSCUsta7zT2wzb5SWY+F lg02Qd+6lqR40S13iJKyr/ZjbQ+NeaveQbVGVJQs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Liang He , Piotr Raczynski , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 050/115] ethernet: sun: add check for the mdesc_grab() Date: Mon, 20 Mar 2023 15:54:22 +0100 Message-Id: <20230320145451.503282399@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320145449.336983711@linuxfoundation.org> References: <20230320145449.336983711@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Liang He [ Upstream commit 90de546d9a0b3c771667af18bb3f80567eabb89b ] In vnet_port_probe() and vsw_port_probe(), we should check the return value of mdesc_grab() as it may return NULL which can caused NPD bugs. Fixes: 5d01fa0c6bd8 ("ldmvsw: Add ldmvsw.c driver code") Fixes: 43fdf27470b2 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.") Signed-off-by: Liang He Reviewed-by: Piotr Raczynski Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/sun/ldmvsw.c | 3 +++ drivers/net/ethernet/sun/sunvnet.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 50bd4e3b0af9d..cde65f76e5cef 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -290,6 +290,9 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) hp = mdesc_grab(); + if (!hp) + return -ENODEV; + rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); err = -ENODEV; if (!rmac) { diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 58ee89223951e..dcdfc1fd3d2ca 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -431,6 +431,9 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) hp = mdesc_grab(); + if (!hp) + return -ENODEV; + vp = vnet_find_parent(hp, vdev->mp, vdev); if (IS_ERR(vp)) { pr_err("Cannot find port parent vnet\n"); -- 2.39.2