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nl80211: fix memory leak in monitor flags parsing 

If monitor flags parsing results in active monitor but that
isn't supported, the already allocated message is leaked.
Fix this by moving the allocation after this check.

Reported-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-02-24 10:56:42 +01:00
parent 5528fae886
commit a18c7192aa
1 changed files with 4 additions and 4 deletions
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8
net/wireless/nl80211.c
View File

@ -2654,10 +2654,6 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
return err;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
&flags);
@ -2666,6 +2662,10 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
!(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
wdev = rdev_add_virtual_intf(rdev,
nla_data(info->attrs[NL80211_ATTR_IFNAME]),
type, err ? NULL : &flags, &params);