Patch "PCI: Prevent out of bounds access in numa_node override" has been added to the 4.1-stable tree

Patch "PCI: Prevent out of bounds access in numa_node override" has been added to the 4.1-stable tree

[gregkh]

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

    PCI: Prevent out of bounds access in numa_node override

to the 4.1-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:
     pci-prevent-out-of-bounds-access-in-numa_node-override.patch
and it can be found in the queue-4.1 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 1266963170f576d4d08e6310b6963e26d3ff9d1e Mon Sep 17 00:00:00 2001
From: Sasha Levin <sasha.levin@oracle.com>
Date: Wed, 7 Oct 2015 11:03:28 -0500
Subject: PCI: Prevent out of bounds access in numa_node override

From: Sasha Levin <sasha.levin@oracle.com>

commit 1266963170f576d4d08e6310b6963e26d3ff9d1e upstream.

63692df103e9 ("PCI: Allow numa_node override via sysfs") didn't check that
the numa node provided by userspace is valid.  Passing a node number too
high would attempt to access invalid memory and trigger a kernel panic.

Fixes: 63692df103e9 ("PCI: Allow numa_node override via sysfs")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/pci-sysfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -216,7 +216,7 @@ static ssize_t numa_node_store(struct de
 	if (ret)
 		return ret;
 
-	if (!node_online(node))
+	if (node >= MAX_NUMNODES || !node_online(node))
 		return -EINVAL;
 
 	add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);


Patches currently in stable-queue which might be from sasha.levin@oracle.com are

queue-4.1/pci-prevent-out-of-bounds-access-in-numa_node-override.patch