This is a note to let you know that I've just added the patch titled cfg80211: fix proto in ieee80211_data_to_8023 for frames without LLC header to the 4.6-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: cfg80211-fix-proto-in-ieee80211_data_to_8023-for-frames-without-llc-header.patch and it can be found in the queue-4.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From c041778c966c92c964033f1cdfee60a9f2b5e465 Mon Sep 17 00:00:00 2001 From: Felix Fietkau <nbd@xxxxxxxx> Date: Wed, 29 Jun 2016 10:36:39 +0200 Subject: cfg80211: fix proto in ieee80211_data_to_8023 for frames without LLC header From: Felix Fietkau <nbd@xxxxxxxx> commit c041778c966c92c964033f1cdfee60a9f2b5e465 upstream. The PDU length of incoming LLC frames is set to the total skb payload size in __ieee80211_data_to_8023() of net/wireless/util.c which incorrectly includes the length of the IEEE 802.11 header. The resulting LLC frame header has a too large PDU length, causing the llc_fixup_skb() function of net/llc/llc_input.c to reject the incoming skb, effectively breaking STP. Solve the problem by properly substracting the IEEE 802.11 frame header size from the PDU length, allowing the LLC processor to pick up the incoming control messages. Special thanks to Gerry Rozema for tracking down the regression and proposing a suitable patch. Fixes: 2d1c304cb2d5 ("cfg80211: add function for 802.3 conversion with separate output buffer") Reported-by: Gerry Rozema <gerryr@xxxxxxxxxxxx> Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/wireless/util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -509,7 +509,7 @@ static int __ieee80211_data_to_8023(stru * replace EtherType */ hdrlen += ETH_ALEN + 2; else - tmp.h_proto = htons(skb->len); + tmp.h_proto = htons(skb->len - hdrlen); pskb_pull(skb, hdrlen); Patches currently in stable-queue which might be from nbd@xxxxxxxx are queue-4.6/cfg80211-fix-proto-in-ieee80211_data_to_8023-for-frames-without-llc-header.patch queue-4.6/mac80211-fix-fast_tx-header-alignment.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