linux-kernel - sky2: in free_buffers() do proper checks before call of rx

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 3 Apr 2012 02:13:27 +0200
From:	Lino Sanfilippo <LinoSanfilippo@....de>
To:	shemminger@...tta.com, mlindner@...vell.com
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: sky2: in free_buffers() do proper checks before call of rx_clean()

In sky2_open() free_buffers() is called in case that alloc_buffers() failed.
Here we do the check for sky2->rx_le too late, since we already called
rx_clean() which accessed rx_le. Furthermore we lack a check for sky2->rx_ring
which is also accessed by rx_clean().

With this patch both sky2->rx_le and sky2->rx_ring are checked before
alloc_buffers() is called.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@....de>
---
 This applies against 3.3

 drivers/net/ethernet/marvell/sky2.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 760c2b1..3e3eda6 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1628,9 +1628,10 @@ static void sky2_free_buffers(struct sky2_port *sky2)
 {
 	struct sky2_hw *hw = sky2->hw;
 
-	sky2_rx_clean(sky2);
-
 	if (sky2->rx_le) {
+		if (sky2->rx_ring)
+			sky2_rx_clean(sky2);
+
 		pci_free_consistent(hw->pdev, RX_LE_BYTES,
 				    sky2->rx_le, sky2->rx_le_map);
 		sky2->rx_le = NULL;
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/