This is a note to let you know that I've just added the patch titled mac80211_hwsim: Add missing check for HWSIM_ATTR_SIGNAL to the 3.14-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: mac80211_hwsim-add-missing-check-for-hwsim_attr_signal.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 62397da50bb20a6b812c949ef465d7e69fe54bb6 Mon Sep 17 00:00:00 2001 From: Martin Willi <martin@xxxxxxxxxxxxxx> Date: Fri, 13 May 2016 12:41:48 +0200 Subject: mac80211_hwsim: Add missing check for HWSIM_ATTR_SIGNAL From: Martin Willi <martin@xxxxxxxxxxxxxx> commit 62397da50bb20a6b812c949ef465d7e69fe54bb6 upstream. A wmediumd that does not send this attribute causes a NULL pointer dereference, as the attribute is accessed even if it does not exist. The attribute was required but never checked ever since userspace frame forwarding has been introduced. The issue gets more problematic once we allow wmediumd registration from user namespaces. Fixes: 7882513bacb1 ("mac80211_hwsim driver support userspace frame tx/rx") Signed-off-by: Martin Willi <martin@xxxxxxxxxxxxxx> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/mac80211_hwsim.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -2251,6 +2251,7 @@ static int hwsim_tx_info_frame_received_ if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] || !info->attrs[HWSIM_ATTR_FLAGS] || !info->attrs[HWSIM_ATTR_COOKIE] || + !info->attrs[HWSIM_ATTR_SIGNAL] || !info->attrs[HWSIM_ATTR_TX_INFO]) goto out; Patches currently in stable-queue which might be from martin@xxxxxxxxxxxxxx are queue-3.14/mac80211_hwsim-add-missing-check-for-hwsim_attr_signal.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html