On Tue, Apr 26, 2011 at 10:27 PM, Arik Nemtsov <arik@xxxxxxxxxx> wrote:
> MIC failure notifications for packets too short to contain a key index
> are currently ignored in AP-mode. Fix the check to only ignore packets
> with an existing non-zero key index.
>
> The wl12xx chip always truncates packets with a failed MIC and requires
> this change to operate correctly in AP-mode.
>
> No such check is made in STA mode. Therefore its relatively safe to assume
> there's no other HW that relies on the current code to avoid spurious
> MIC failures with correct yet truncated packets.
>
> Signed-off-by: Arik Nemtsov <arik@xxxxxxxxxx>
> ---
> net/mac80211/rx.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
> index a864890..875fc3c 100644
> --- a/net/mac80211/rx.c
> +++ b/net/mac80211/rx.c
> @@ -2391,7 +2391,7 @@ static void ieee80211_rx_michael_mic_report(struct ieee80211_hdr *hdr,
> if (!ieee80211_has_protected(hdr->frame_control))
> return;
>
> - if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx) {
> + if (rx->sdata->vif.type == NL80211_IFTYPE_AP && keyidx > 0) {
> /*
> * APs with pairwise keys should never receive Michael MIC
> * errors for non-zero keyidx because these are reserved for
> --
wait! Since you seem able to trigger MIC events frequently, could you
please test if the following patch:
<http://www.spinics.net/lists/linux-wireless/msg67571.html>
<a little more info:http://www.spinics.net/lists/linux-wireless/msg67461.html>
would help in your case as well?
Regards,
Christian
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