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 4.2-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-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1266963170f576d4d08e6310b6963e26d3ff9d1e Mon Sep 17 00:00:00 2001
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
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@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
queue-4.2/pci-prevent-out-of-bounds-access-in-numa_node-override.patch
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