From: Arnaldo Carvalho de Melo <acme@mandriva.com>
Date: Tue, 21 Nov 2006 03:26:49 +0000 (-0200)
Subject: [PATCH] Check ieee80211softmac_auth_resp kmalloc result
X-Git-Tag: v3.12-rc1~31383^2~47^2~564^2~42
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=571d6eee9b5bce28fcbeb7588890ad5ca3f8c718;p=kernel%2Fkernel-generic.git

[PATCH] Check ieee80211softmac_auth_resp kmalloc result

And use kmemdup and kzalloc where applicable

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c
index 2b14c2f..f16e60e 100644
--- a/net/ieee80211/ieee80211_module.c
+++ b/net/ieee80211/ieee80211_module.c
@@ -67,7 +67,7 @@ static int ieee80211_networks_allocate(struct ieee80211_device *ieee)
 		return 0;
 
 	ieee->networks =
-	    kmalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
+	    kzalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
 		    GFP_KERNEL);
 	if (!ieee->networks) {
 		printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
@@ -75,9 +75,6 @@ static int ieee80211_networks_allocate(struct ieee80211_device *ieee)
 		return -ENOMEM;
 	}
 
-	memset(ieee->networks, 0,
-	       MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
-
 	return 0;
 }
 
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index ce28d57..d97e541 100644
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -1304,12 +1304,11 @@ static int ieee80211_parse_info_param(struct ieee80211_info_element
 		case MFIE_TYPE_IBSS_DFS:
 			if (network->ibss_dfs)
 				break;
-			network->ibss_dfs =
-			    kmalloc(info_element->len, GFP_ATOMIC);
+			network->ibss_dfs = kmemdup(info_element->data,
+						    info_element->len,
+						    GFP_ATOMIC);
 			if (!network->ibss_dfs)
 				return 1;
-			memcpy(network->ibss_dfs, info_element->data,
-			       info_element->len);
 			network->flags |= NETWORK_HAS_IBSS_DFS;
 			break;
 
diff --git a/net/ieee80211/softmac/ieee80211softmac_auth.c b/net/ieee80211/softmac/ieee80211softmac_auth.c
index 95e5287..0612015 100644
--- a/net/ieee80211/softmac/ieee80211softmac_auth.c
+++ b/net/ieee80211/softmac/ieee80211softmac_auth.c
@@ -216,10 +216,16 @@ ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
 			net->challenge_len = *data++; 	
 			if (net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
 				net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
-			if (net->challenge != NULL)
-				kfree(net->challenge);
-			net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
-			memcpy(net->challenge, data, net->challenge_len);
+			kfree(net->challenge);
+			net->challenge = kmemdup(data, net->challenge_len,
+						 GFP_ATOMIC);
+			if (net->challenge == NULL) {
+				printkl(KERN_NOTICE PFX "Shared Key "
+					"Authentication failed due to "
+					"memory shortage.\n");
+				spin_unlock_irqrestore(&mac->lock, flags);
+				break;
+			}
 			aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE; 
 
 			/* We reuse the work struct from the auth request here.