[patch] cfg80211: off by one in ieee80211_bss()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

We do a:

	sprintf(buf, " Last beacon: %ums ago",
		elapsed_jiffies_msecs(bss->ts));

elapsed_jiffies_msecs() can return a 10 digit number so "buf" needs to
be 31 characters long.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 01592d7..45f1618 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1358,7 +1358,7 @@ ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info,
 						  &iwe, IW_EV_UINT_LEN);
 	}
 
-	buf = kmalloc(30, GFP_ATOMIC);
+	buf = kmalloc(31, GFP_ATOMIC);
 	if (buf) {
 		memset(&iwe, 0, sizeof(iwe));
 		iwe.cmd = IWEVCUSTOM;
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