Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 137/155] PCI: Prevent out of bounds access in numa_node override | Date | Thu, 12 Nov 2015 15:18:11 -0800 |
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3.19.8-ckt10 -stable review patch. If anyone has any objections, please let me know.
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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: Kamal Mostafa <kamal@canonical.com> --- drivers/pci/pci-sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 312f23a..9261868 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -216,7 +216,7 @@ static ssize_t numa_node_store(struct device *dev, 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); -- 1.9.1
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