diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2014-11-14 20:43:28 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2014-11-19 20:50:34 +0300 |
| commit | d687cbb703f50980e155c5642cf229ec2bb45e3e (patch) | |
| tree | 6d4d167a3b672ad05a814d899bbbde8a89240e94 /net/wireless | |
| parent | c7ab508190aee6b4a62cfab7ee08457602468672 (diff) | |
| download | linux-d687cbb703f50980e155c5642cf229ec2bb45e3e.tar.xz | |
cfg80211: protect fools returning NULL in add_virtual_intf
Callback add_virtual_intf is supposed to return ERR_PTR and trying to
return NULL results in some "Unable to handle kernel paging request",
etc. As it may be complicated to debug & trace, let's catch it (WARN).
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/nl80211.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index dd5a827f9cb0..5cfd75dfff67 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2645,7 +2645,10 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) wdev = rdev_add_virtual_intf(rdev, nla_data(info->attrs[NL80211_ATTR_IFNAME]), type, err ? NULL : &flags, ¶ms); - if (IS_ERR(wdev)) { + if (WARN_ON(!wdev)) { + nlmsg_free(msg); + return -EPROTO; + } else if (IS_ERR(wdev)) { nlmsg_free(msg); return PTR_ERR(wdev); } |