nl80211: Make nl80211_send_mlme_event() atomic

One of the code paths sending deauth/disassoc events ends up calling
this function with rcu_read_lock held, so we must use GFP_ATOMIC in
allocation routines.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 353e1a4ece836423dd503e55becc7cbffd4a2812..2456e4ee445e04ab884fa17a2fb8ed835ab59996 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3334,7 +3334,7 @@ static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
        struct sk_buff *msg;
        void *hdr;
 
-       msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+       msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
        if (!msg)
                return;
 
@@ -3353,7 +3353,7 @@ static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
                return;
        }
 
-       genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
+       genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
        return;
 
  nla_put_failure: