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  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, 23 Jun 2008 14:55:12 +0200
From:	Stefan Roese <sr@...x.de>
To:	linuxppc-dev@...abs.org, netdev@...r.kernel.org
Cc:	benh@...nel.crashing.org, Sathya Narayanan <sathyan@...mf1.com>
Subject: [PATCH] ibm_newemac: Fixes memory leak in ibm_newemac ethernet driver

From: Sathya Narayanan <sathyan@...mf1.com>

This patch addresses the memory leak happenning in drivers transmit queue
under heavy load condition. Once the transmit queue becomes full, driver
does an automatic wrapup of queue. During which the untransmitted SKB's are
lost without getting freed up.

Signed-off-by: Sathya Narayanan <sathyan@...mf1.com>
Signed-off-by: Stefan Roese <sr@...x.de>
---
 drivers/net/ibm_newemac/core.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
index aa407b2..ee868b6 100644
--- a/drivers/net/ibm_newemac/core.c
+++ b/drivers/net/ibm_newemac/core.c
@@ -1328,6 +1328,13 @@ static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	DBG2(dev, "xmit(%u) %d" NL, len, slot);
 
+	if (dev->tx_skb[slot] && dev->tx_desc[slot].data_ptr) {
+		dev_kfree_skb(dev->tx_skb[slot]);
+		dev->tx_skb[slot] = NULL;
+		dev->tx_cnt--;
+		++dev->estats.tx_dropped;
+	}
+
 	dev->tx_skb[slot] = skb;
 	dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
 						     skb->data, len,
-- 
1.5.6

--
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

Powered by blists - more mailing lists