netdev - [PATCH net-next 1/6] bnx2: Prevent ethtool -s from crashing when device is down.

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]

Date:	Thu, 10 Jul 2008 18:29:10 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	davem@...emloft.net
cc:	netdev@...r.kernel.org, "Michael Chan" <mchan@...adcom.com>
Subject: [PATCH net-next 1/6] bnx2: Prevent ethtool -s from crashing
 when device is down.

The device may be in D3-hot state and may crash if we try to
configure the speed settings by accessing the registers.

Signed-off-by: Michael Chan <mchan@...adcom.com>
---
 drivers/net/bnx2.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index ad61cfd..e9cfb02 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -6215,6 +6215,12 @@ bnx2_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 	    !(bp->phy_flags & BNX2_PHY_FLAG_REMOTE_PHY_CAP))
 		goto err_out_unlock;
 
+	/* If device is down, we can store the settings only if the user
+	 * is setting the currently active port.
+	 */
+	if (!netif_running(dev) && cmd->port != bp->phy_port)
+		goto err_out_unlock;
+
 	if (cmd->autoneg == AUTONEG_ENABLE) {
 		autoneg |= AUTONEG_SPEED;
 
@@ -6272,7 +6278,12 @@ bnx2_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 	bp->req_line_speed = req_line_speed;
 	bp->req_duplex = req_duplex;
 
-	err = bnx2_setup_phy(bp, cmd->port);
+	err = 0;
+	/* If device is down, the new settings will be picked up when it is
+	 * brought up.
+	 */
+	if (netif_running(dev))
+		err = bnx2_setup_phy(bp, cmd->port);
 
 err_out_unlock:
 	spin_unlock_bh(&bp->phy_lock);
-- 
1.5.5.GIT


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html