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Date:   Wed, 12 Oct 2016 22:39:49 -0700
From:   Andy Lutomirski <>
To:     Johannes Berg <>
Cc:     Sergey Senozhatsky <>,
        Andy Lutomirski <>,
        "David S. Miller" <>,
        Linux Wireless List <>,
        Network Development <>,
        "" <>,
        Sergey Senozhatsky <>,
        "" <>,
        Stephen Rothwell <>,
        Herbert Xu <>
Subject: Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)

On Wed, Oct 12, 2016 at 7:22 AM, Johannes Berg
<> wrote:
>> > Can you elaborate on how exactly it kills your system?
>> the last time I saw it it was a NULL deref at
>> ieee80211_aes_ccm_decrypt.
> Hm. I was expecting something within the crypto code would cause the
> crash, this seems strange.
> Anyway, I'm surely out of my depth wrt. the actual cause. Something
> like the patch below probably works around it, but it's horribly
> inefficient due to the locking and doesn't cover CMAC/GMAC either.

In a pinch, I have these patches sitting around:

I don't like them, though.  I think it's rather silly that we can't
just pass virtual addresses to the crypto code.

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