This is a note to let you know that I've just added the patch titled
nl80211: fix per-station group key get/del and memory leak
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nl80211-fix-per-station-group-key-get-del-and-memory-leak.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0fa7b39131576dd1baa6ca17fca53c65d7f62249 Mon Sep 17 00:00:00 2001
From: Johannes Berg <[email protected]>
Date: Fri, 23 Jan 2015 11:10:12 +0100
Subject: nl80211: fix per-station group key get/del and memory leak
From: Johannes Berg <[email protected]>
commit 0fa7b39131576dd1baa6ca17fca53c65d7f62249 upstream.
In case userspace attempts to obtain key information for or delete a
unicast key, this is currently erroneously rejected unless the driver
sets the WIPHY_FLAG_IBSS_RSN flag. Apparently enough drivers do so it
was never noticed.
Fix that, and while at it fix a potential memory leak: the error path
in the get_key() function was placed after allocating a message but
didn't free it - move it to a better place. Luckily admin permissions
are needed to call this operation.
Fixes: e31b82136d1ad ("cfg80211/mac80211: allow per-station GTKs")
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/wireless/nl80211.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2805,6 +2805,9 @@ static int nl80211_get_key(struct sk_buf
if (!rdev->ops->get_key)
return -EOPNOTSUPP;
+ if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
+ return -ENOENT;
+
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -2824,10 +2827,6 @@ static int nl80211_get_key(struct sk_buf
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
goto nla_put_failure;
- if (pairwise && mac_addr &&
- !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
- return -ENOENT;
-
err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
get_key_callback);
@@ -2998,7 +2997,7 @@ static int nl80211_del_key(struct sk_buf
wdev_lock(dev->ieee80211_ptr);
err = nl80211_key_allowed(dev->ieee80211_ptr);
- if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
+ if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
!(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
err = -ENOENT;
Patches currently in stable-queue which might be from [email protected]
are
queue-3.18/mac80211-only-roll-back-station-states-for-wds-when-suspending.patch
queue-3.18/mac80211-properly-set-cck-flag-in-radiotap.patch
queue-3.18/nl80211-fix-per-station-group-key-get-del-and-memory-leak.patch
--
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