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  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:	Mon, 27 Dec 2010 09:54:02 -0600
From:	"J. K. Cliburn" <>
To:	David Miller <>
Cc:	Tõnu Raitviir <>,
	Luca Tettamanti <>,
	Chris Snook <>,,
	Xiong Huang <>,
Subject: [PATCH] atl1: fix oops when changing tx/rx ring params

Commit 3f5a2a713aad28480d86b0add00c68484b54febc zeroes out the statistics
message block (SMB) and coalescing message block (CMB) when adapter ring
resources are freed.  This is desirable behavior, but, as a side effect,
the commit leads to an oops when atl1_set_ringparam() attempts to alter
the number of rx or tx descriptors in the ring buffer (by using ethtool
-G, for example).  We don't want SMB or CMB to change during this

Modify atl1_set_ringparam() to preserve SMB and CMB when changing ring

Signed-off-by: Jay Cliburn <>
Reported-by: Tõnu Raitviir <>
 drivers/net/atlx/atl1.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index def8df8..6d4f051 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -3504,6 +3504,8 @@ static int atl1_set_ringparam(struct net_device *netdev,
 	struct atl1_rfd_ring rfd_old, rfd_new;
 	struct atl1_rrd_ring rrd_old, rrd_new;
 	struct atl1_ring_header rhdr_old, rhdr_new;
+	struct atl1_smb smb;
+	struct atl1_cmb cmb;
 	int err;
 	tpd_old = adapter->tpd_ring;
@@ -3544,11 +3546,20 @@ static int atl1_set_ringparam(struct net_device *netdev,
 		adapter->rrd_ring = rrd_old;
 		adapter->tpd_ring = tpd_old;
 		adapter->ring_header = rhdr_old;
+		/*
+ 		 * Save SMB and CMB, since atl1_free_ring_resources
+ 		 * will clear them as a result of commit
+ 		 * 3f5a2a713aad28480d86b0add00c68484b54febc
+ 		 */
+		smb = adapter->smb;
+		cmb = adapter->cmb;
 		adapter->rfd_ring = rfd_new;
 		adapter->rrd_ring = rrd_new;
 		adapter->tpd_ring = tpd_new;
 		adapter->ring_header = rhdr_new;
+		adapter->smb = smb;
+		adapter->cmb = cmb;
 		err = atl1_up(adapter);
 		if (err)

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists