commit d91c01c757bd9659ac10549504586fae610265a4
author Jouni Malinen <j@w1.fi> Sat Apr 18 21:53:15 2009 +0300
committer John W. Linville <linville@tuxdriver.com> Mon Apr 20 16:36:26 2009 -0400
tree 17bfe2494a8798f4902892ac1854f301306e5d5f
parent e10a9dfc35ae6bd62bbb83df08297ea06b54d9ce

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>

net/wireless/nl80211.c

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 353e1a4..2456e4e 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3334,7 +3334,7 @@
 	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 @@
 		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: