lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <1685566429-2869-1-git-send-email-justin.chen@broadcom.com>
Date: Wed, 31 May 2023 13:53:49 -0700
From: Justin Chen <justin.chen@...adcom.com>
To: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: bcm-kernel-feedback-list@...adcom.com,
	florian.fainelli@...adcom.com,
	Justin Chen <justin.chen@...adcom.com>
Subject: [PATCH net-next] ethtool: ioctl: improve error checking for set_wol

The netlink version of set_wol checks for not supported wolopts and avoids
setting wol when the correct wolopt is already set. If we do the same with
the ioctl version then we can remove these checks from the driver layer.

Signed-off-by: Justin Chen <justin.chen@...adcom.com>
---
 net/ethtool/ioctl.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 6bb778e10461..80f456f83db0 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1436,15 +1436,25 @@ static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 
 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 {
-	struct ethtool_wolinfo wol;
+	struct ethtool_wolinfo wol, cur_wol;
 	int ret;
 
-	if (!dev->ethtool_ops->set_wol)
+	if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
 		return -EOPNOTSUPP;
 
+	memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
+	cur_wol.cmd = ETHTOOL_GWOL;
+	dev->ethtool_ops->get_wol(dev, &cur_wol);
+
 	if (copy_from_user(&wol, useraddr, sizeof(wol)))
 		return -EFAULT;
 
+	if (wol.wolopts & ~cur_wol.supported)
+		return -EOPNOTSUPP;
+
+	if (wol.wolopts == cur_wol.wolopts)
+		return 0;
+
 	ret = dev->ethtool_ops->set_wol(dev, &wol);
 	if (ret)
 		return ret;
-- 
2.7.4


Download attachment "smime.p7s" of type "application/pkcs7-signature" (4206 bytes)

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ