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| author | Sasha Levin <sasha.levin@oracle.com> | 2015-10-07 19:03:28 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-10-07 19:03:28 +0300 |
| commit | 1266963170f576d4d08e6310b6963e26d3ff9d1e (patch) | |
| tree | f7f1b34cd29a898d802a0730eefe4f7c8aa7fcf6 /drivers/pci | |
| parent | de24c18c0faca5ebd618e1cb87f5489745e40475 (diff) | |
| download | linux-1266963170f576d4d08e6310b6963e26d3ff9d1e.tar.xz | |
PCI: Prevent out of bounds access in numa_node override
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>
CC: stable@vger.kernel.org # v3.19+
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 312f23a8429c..92618686604c 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); |