From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Jarek Poplawski <jarkao2@gmail.com>,
Andy Fleming <afleming@freescale.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [60/82] gianfar: Fix crashes on RX path (Was Re: [Bugme-new] [Bug 19692] New: linux-2.6.36-rc5 crash with gianfar ethernet at full line rate traffic)
Date: Fri, 19 Nov 2010 13:56:21 -0800 [thread overview]
Message-ID: <20101119215643.671111801@clark.site> (raw)
In-Reply-To: <20101119215658.GA7804@kroah.com
2.6.35-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jarek Poplawski <jarkao2@gmail.com>
[ Upstream commit 0d1fe1111c667e9c713d7efc7ae468a605f236a4 ]
The rx_recycle queue is global per device but can be accesed by many
napi handlers at the same time, so it needs full skb_queue primitives
(with locking). Otherwise, various crashes caused by broken skbs are
possible.
This patch resolves, at least partly, bugzilla bug 19692. (Because of
some doubts that there could be still something around which is hard
to reproduce my proposal is to leave this bug opened for a month.)
Fixes commit: 0fd56bb5be6455d0d42241e65aed057244665e5e ("gianfar: Add
support for skb recycling")
Reported-by: emin ak <eminak71@gmail.com>
Tested-by: emin ak <eminak71@gmail.com>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
CC: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/net/gianfar.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -2427,7 +2427,7 @@ static int gfar_clean_tx_ring(struct gfa
if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
skb_recycle_check(skb, priv->rx_buffer_size +
RXBUF_ALIGNMENT))
- __skb_queue_head(&priv->rx_recycle, skb);
+ skb_queue_head(&priv->rx_recycle, skb);
else
dev_kfree_skb_any(skb);
@@ -2498,7 +2498,7 @@ struct sk_buff * gfar_new_skb(struct net
struct gfar_private *priv = netdev_priv(dev);
struct sk_buff *skb = NULL;
- skb = __skb_dequeue(&priv->rx_recycle);
+ skb = skb_dequeue(&priv->rx_recycle);
if (!skb)
skb = netdev_alloc_skb(dev,
priv->rx_buffer_size + RXBUF_ALIGNMENT);
@@ -2675,7 +2675,7 @@ int gfar_clean_rx_ring(struct gfar_priv_
* recycle list.
*/
skb_reserve(skb, -GFAR_CB(skb)->alignamount);
- __skb_queue_head(&priv->rx_recycle, skb);
+ skb_queue_head(&priv->rx_recycle, skb);
}
} else {
/* Increment the number of packets */
reply other threads:[~2010-11-19 22:20 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20101119215643.671111801@clark.site \
--to=gregkh@suse.de \
--cc=afleming@freescale.com \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=davem@davemloft.net \
--cc=jarkao2@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=stable-review@kernel.org \
--cc=stable@kernel.org \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®