Patch "qlcnic: fix unchecked return value" has been added to the 3.18-stable tree

Patch "qlcnic: fix unchecked return value" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    qlcnic: fix unchecked return value

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     qlcnic-fix-unchecked-return-value.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Mar 22 15:16:04 CET 2018
From: Pan Bian <bianpan2016@163.com>
Date: Sun, 23 Apr 2017 20:04:04 +0800
Subject: qlcnic: fix unchecked return value

From: Pan Bian <bianpan2016@163.com>


[ Upstream commit 91ec701a553cb3de470fd471c6fefe3ad1125455 ]

Function pci_find_ext_capability() may return 0, which is an invalid
address. In function qlcnic_sriov_virtid_fn(), its return value is used
without validation. This may result in invalid memory access bugs. This
patch fixes the bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
@@ -126,6 +126,8 @@ static int qlcnic_sriov_virtid_fn(struct
 		return 0;
 
 	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_SRIOV);
+	if (!pos)
+		return 0;
 	pci_read_config_word(dev, pos + PCI_SRIOV_VF_OFFSET, &offset);
 	pci_read_config_word(dev, pos + PCI_SRIOV_VF_STRIDE, &stride);
 


Patches currently in stable-queue which might be from bianpan2016@163.com are

queue-3.18/rndis_wlan-add-return-value-validation.patch
queue-3.18/qlcnic-fix-unchecked-return-value.patch
queue-3.18/wan-pc300too-abort-path-on-failure.patch