From: Johannes Berg <johannes@sipsolutions.net>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Stephen Rothwell <sfr@canb.auug.org.au>,
"linux-next@vger.kernel.org" <linux-next@vger.kernel.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Network Development <netdev@vger.kernel.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Linux Wireless List <linux-wireless@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jouni Malinen <j@w1.fi>
Subject: Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)
Date: Fri, 14 Oct 2016 11:10:48 +0200 [thread overview]
Message-ID: <1476436248.31114.21.camel@sipsolutions.net> (raw)
In-Reply-To: <CAKv+Gu9KObA61fEYxr1FFj_3SKNS2RUbqZo01yfnm9Bf0AncwA@mail.gmail.com> (sfid-20161014_110501_838823_6646CA89)
On Fri, 2016-10-14 at 10:05 +0100, Ard Biesheuvel wrote:
>
> Indeed. And the decrypt path does the same for auth_tag[].
Hadn't gotten that far, due to the BUG_ON() in CONFIG_DEBUG_SG in the
encrypt path :)
> But that still means there are two separate problems here, one which
> affects the WPA code, and one that only affects the generic CCM
> chaining mode (but not the accelerated arm64 implementation)
Yes. The generic CCM chaining still doesn't typically have a request on
the stack though. In fact, ESP (net/ipv4/esp4.c) for example will do
temporary allocations with kmalloc for every frame, it seems.
> Unsurprisingly, I would strongly prefer those to be fixed properly
> rather than backing out my patch, but I'm happy to help out whichever
> solution we reach consensus on.
Yeah, obviously, it would be good to use the accelerated versions after
all.
> I will check whether this removes the issue when not using
> crypto/ccm.ko
Ok. I think we can probably live with having those 48 bytes in per-CPU
buffers, but I suppose we don't really want to have ~500.
johannes
next prev parent reply other threads:[~2016-10-14 9:10 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-10 15:03 [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky
2016-10-10 15:30 ` Sergey Senozhatsky
2016-10-12 9:05 ` Johannes Berg
2016-10-12 14:12 ` Sergey Senozhatsky
2016-10-12 14:22 ` Johannes Berg
2016-10-13 5:39 ` Andy Lutomirski
2016-10-13 6:02 ` Johannes Berg
2016-10-13 13:42 ` Sergey Senozhatsky
2016-10-13 13:45 ` Sergey Senozhatsky
2016-10-13 13:45 ` Johannes Berg
2016-10-13 15:00 ` Sergey Senozhatsky
2016-10-13 15:04 ` Sergey Senozhatsky
2016-10-13 21:49 ` Andy Lutomirski
2016-10-14 7:25 ` Johannes Berg
2016-10-14 8:28 ` Johannes Berg
2016-10-14 8:39 ` Ard Biesheuvel
2016-10-14 8:41 ` Ard Biesheuvel
2016-10-14 8:42 ` Johannes Berg
2016-10-14 8:47 ` Ard Biesheuvel
[not found] ` <CAKv+Gu896xme5sd5i8hs7tA=Xt=qQKCiAx7fQg1ZECn50NttbQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-14 8:55 ` Johannes Berg
2016-10-14 9:05 ` Ard Biesheuvel
2016-10-14 9:10 ` Johannes Berg [this message]
2016-10-14 9:21 ` Ard Biesheuvel
2016-10-14 9:25 ` Johannes Berg
2016-10-14 9:35 ` Ard Biesheuvel
2016-10-14 10:00 ` Johannes Berg
2016-10-14 11:11 ` Ard Biesheuvel
2016-10-14 8:53 ` Johannes Berg
2016-10-14 8:39 ` Sergey Senozhatsky
2016-10-14 8:45 ` Johannes Berg
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