Commit 2bb60cb9 authored Feb 22, 2013 by Alexander Duyck Committed by David S. Miller Feb 22, 2013

net: Fix locking bug in netif_set_xps_queue



Smatch found a locking bug in netif_set_xps_queue in which we were not
releasing the lock in the case of an allocation failure.

This change corrects that so that we release the xps_map_mutex before
returning -ENOMEM in the case of an allocation failure.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5b052042

net/core/dev.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1882,8 +1882,10 @@ int netif_set_xps_queue(struct net_device dev, struct cpumask mask, u16 index)

		if (!new_dev_maps)
		new_dev_maps = kzalloc(maps_sz, GFP_KERNEL);
		if (!new_dev_maps)
		if (!new_dev_maps) {
		mutex_unlock(&xps_map_mutex);
		return -ENOMEM;
		}

		map = dev_maps ? xmap_dereference(dev_maps->cpu_map[cpu]) :
		NULL;

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