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Message-ID: <ADFE82A996F10145934E45547759F763311CC076@avmb3.qlogic.org>
Date: Tue, 27 Aug 2013 04:25:43 +0000
From: Himanshu Madhani <himanshu.madhani@...gic.com>
To: Dan Carpenter <dan.carpenter@...cle.com>
CC: Rajesh Borundia <rajesh.borundia@...gic.com>,
Shahed Shaikh <shahed.shaikh@...gic.com>,
Jitendra Kalsaria <jitendra.kalsaria@...gic.com>,
Sony Chacko <sony.chacko@...gic.com>,
Sucheta Chakraborty <sucheta.chakraborty@...gic.com>,
Dept-Eng Linux Driver <Linux-Driver@...gic.com>,
netdev <netdev@...r.kernel.org>,
"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [patch -next] qlcnic: underflow in
qlcnic_validate_max_tx_rings()
________________________________________
From: Dan Carpenter [dan.carpenter@...cle.com]
Sent: Monday, August 26, 2013 6:16 PM
To: Himanshu Madhani
Cc: Rajesh Borundia; Shahed Shaikh; Jitendra Kalsaria; Sony Chacko; Sucheta Chakraborty; Dept-Eng Linux Driver; netdev; kernel-janitors@...r.kernel.org
Subject: [patch -next] qlcnic: underflow in qlcnic_validate_max_tx_rings()
This function checks the upper bound but it doesn't check for negative
numbers:
if (txq > QLCNIC_MAX_TX_RINGS) {
I've solved this by making "txq" a u32 type. I chose that because
->tx_count in the ethtool_channels struct is a __u32.
This bug was added in aa4a1f7df7 ('qlcnic: Enable Tx queue changes using
ethtool for 82xx Series adapter.').
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
index 3f03856..ae9b444 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
@@ -1537,7 +1537,7 @@ int qlcnic_diag_alloc_res(struct net_device *netdev, int test);
netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
int qlcnic_set_max_rss(struct qlcnic_adapter *, u8, int);
int qlcnic_validate_max_rss(struct qlcnic_adapter *, __u32);
-int qlcnic_validate_max_tx_rings(struct qlcnic_adapter *, int);
+int qlcnic_validate_max_tx_rings(struct qlcnic_adapter *, u32 txq);
void qlcnic_alloc_lb_filters_mem(struct qlcnic_adapter *adapter);
void qlcnic_82xx_set_mac_filter_count(struct qlcnic_adapter *);
int qlcnic_enable_msix(struct qlcnic_adapter *, u32);
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 8321d1a..88e3c97 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -3524,7 +3524,7 @@ qlcnicvf_start_firmware(struct qlcnic_adapter *adapter)
return err;
}
-int qlcnic_validate_max_tx_rings(struct qlcnic_adapter *adapter, int txq)
+int qlcnic_validate_max_tx_rings(struct qlcnic_adapter *adapter, u32 txq)
{
struct net_device *netdev = adapter->netdev;
u8 max_hw = QLCNIC_MAX_TX_RINGS;
Thanks
Acked-by: Himanshu Madhani <himanshu.madhani@...gic.com>--
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