netdev - [PATCH] FS_ENET: Don't attempt to set mii_speed when fec

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-prev] [day] [month] [year] [list]

Message-ID: <20080627220923.GA3126@curtisfong.org>
Date:	Fri, 27 Jun 2008 15:09:23 -0700
From:	Nye Liu <nyet@...t.org>
To:	linux-kernel@...r.kernel.org
Cc:	pantelis.antoniou@...il.com, linuxppc-dev@...abs.org,
	netdev@...r.kernel.org
Subject: [PATCH] FS_ENET: Don't attempt to set mii_speed when fec_inf is
	null

From: Nye Liu <nyet@....com>

When using CONFIG_FIXED_PHY, fec_inf (fep->phydev->bus->priv) is NULL in
fs_enet/mac-fec.c restart(). Dereferencing fec_inf when trying to set the
mii_speed causes a kernel oops.

Signed-off-by: Nye Liu <nyet@....com>

---

diff --git a/drivers/net/fs_enet/mac-fec.c b/drivers/net/fs_enet/mac-fec.c
index 8a311d1..7359068 100644
--- a/drivers/net/fs_enet/mac-fec.c
+++ b/drivers/net/fs_enet/mac-fec.c
@@ -328,7 +328,8 @@ static void restart(struct net_device *dev)
 	/*
 	 * Set MII speed.
 	 */
-	FW(fecp, mii_speed, fec_inf->mii_speed);
+	if (fec_inf)
+		FW(fecp, mii_speed, fec_inf->mii_speed);
 
 	/*
 	 * Clear any outstanding interrupt.
--
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