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Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)

From Johannes Berg <johannes@sipsolutions.net>
Newsgroups linux.kernel
Subject Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)
Date 2016-10-13 16:20 +0200
Message-ID <srP1v-4Cs-21@gated-at.bofh.it> (permalink)
References (5 earlier) <srHnj-87T-5@gated-at.bofh.it> <srHnj-87T-19@gated-at.bofh.it> <srOyu-49a-29@gated-at.bofh.it> <srP1v-4Cs-23@gated-at.bofh.it> <srOyu-49a-29@gated-at.bofh.it>
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On Thu, 2016-10-13 at 22:42 +0900, Sergey Senozhatsky wrote:
> 
> > > https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commi
> > > t/?h=x86/vmap_stack&id=0a39cfa6fbb5d5635c85253cc7d6b44b54822afd
> > > https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commi
> > > t/?h=x86/vmap_stack&id=bf8cfa200b5a01383ea39fc8ce2f32909767baa8
> > 
> > That truly sounds like something we'd rather avoid in the TX/RX
> > paths though, which should perform well.
> 
> didn't fix.

It couldn't, since the new helpers weren't used in mac80211 in those
patches yet.

> so I finally had some time to do a better bug-reporter job.
> 
> I added a bunch of printk-s and several virt_addr_valid()-s
> to ieee80211_aes_ccm_encrypt().
> 
> and right befoe the Oops I see the following report from
> virt_addr_valid()
> 
> 
>  FAIL: 00004100002cba02 > ffffc900802cba02 || 1 -> (00004100002cba02
> >> 39) == 130

Yeah, we already know that in this function the aad variable is on the
stack, it explicitly is.

The question, though, is why precisely that fails in the crypto code.
Can you send the Oops report itself?

johannes

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Thread

[mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-10 17:10 +0200
  Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-10 17:40 +0200
    Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-12 11:10 +0200
      Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-12 16:20 +0200
        Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-12 16:30 +0200
          Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Andy Lutomirski <luto@amacapital.net> - 2016-10-13 08:10 +0200
            Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-13 08:10 +0200
              Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-13 15:50 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-13 16:10 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-13 16:20 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-13 17:10 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2016-10-13 17:30 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Andy Lutomirski <luto@amacapital.net> - 2016-10-14 00:00 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 09:30 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 10:30 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 10:40 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 10:50 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 11:00 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 11:10 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 11:20 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 11:30 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 11:40 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 12:10 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 13:20 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 11:30 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-10-14 10:50 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 10:50 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 11:00 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Johannes Berg <johannes@sipsolutions.net> - 2016-10-14 10:50 +0200
                Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2016-10-14 10:50 +0200

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