From: Alexander Duyck Date: Fri, 22 Feb 2013 06:38:44 +0000 (+0000) Subject: net: Fix locking bug in netif_set_xps_queue X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2bb60cb9b7b997bdbc7fd6c8001dcca02a4ea2e1;p=linux-beck.git 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 Signed-off-by: David S. Miller --- diff --git a/net/core/dev.c b/net/core/dev.c index 17bc535115d3..18d8b5acc343 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -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;