diff options
| author | Sasha Levin <sasha.levin@oracle.com> | 2015-10-07 11:03:28 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-11-09 14:37:37 -0800 |
| commit | 3c41d05f5160b2faf4b1d7956b6a015dcfd349c3 (patch) | |
| tree | f069e13bf8a05327a6e720c696e46fbd7b7e98d2 | |
| parent | a5da2bfc2a0163c7e3a856a2f5dc56a284558e72 (diff) | |
PCI: Prevent out of bounds access in numa_node override
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>
| -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); |