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PCI: Prevent out of bounds access in numa_node override
63692df103
("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:63692df103
("PCI: Allow numa_node override via sysfs") Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.19+
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@ -216,7 +216,7 @@ static ssize_t numa_node_store(struct device *dev,
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if (ret)
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return ret;
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if (!node_online(node))
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if (node >= MAX_NUMNODES || !node_online(node))
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return -EINVAL;
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add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
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