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Groups > linux.kernel > #1498575

Re: slab corruption with current -git

From Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups linux.kernel
Subject Re: slab corruption with current -git
Date 2016-10-11 03:00 +0200
Message-ID <sqTAd-8b9-9@gated-at.bofh.it> (permalink)
References <sqJ7P-1T8-5@gated-at.bofh.it> <sqLMm-3uW-23@gated-at.bofh.it> <sqO7v-550-5@gated-at.bofh.it> <sqTgR-84H-7@gated-at.bofh.it>
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On Mon, Oct 10, 2016 at 5:30 PM, David Miller <davem@davemloft.net> wrote:
>
> Linus can you add some extra info to that:

Sure. I made it a WARN_ON_ONCE(), but then always just printed the
pf/hooknum. It's all over the map:

 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=2
 reg->pf=2 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=2
 reg->pf=10 and reg->hooknum=3
 reg->pf=7 and reg->hooknum=1
 reg->pf=7 and reg->hooknum=2
 reg->pf=7 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=0
 reg->pf=2 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=0
 reg->pf=2 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=1
 reg->pf=2 and reg->hooknum=1
 reg->pf=10 and reg->hooknum=0
 reg->pf=10 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=0
 reg->pf=10 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=1
 reg->pf=10 and reg->hooknum=1
 reg->pf=7 and reg->hooknum=3
 reg->pf=7 and reg->hooknum=4
 reg->pf=7 and reg->hooknum=0
 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=2
 reg->pf=2 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=2
 reg->pf=10 and reg->hooknum=3
 reg->pf=7 and reg->hooknum=1
 reg->pf=7 and reg->hooknum=2
 reg->pf=7 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=0
 reg->pf=2 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=0
 reg->pf=2 and reg->hooknum=3
 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=4
 reg->pf=2 and reg->hooknum=1
 reg->pf=2 and reg->hooknum=1
 reg->pf=10 and reg->hooknum=0
 reg->pf=10 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=0
 reg->pf=10 and reg->hooknum=3
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=4
 reg->pf=10 and reg->hooknum=1
 reg->pf=10 and reg->hooknum=1
 reg->pf=7 and reg->hooknum=3
 reg->pf=7 and reg->hooknum=4
 reg->pf=7 and reg->hooknum=0

and putting that through "sort -n" and "uniq -c", I get:

      4  reg->pf=10 and reg->hooknum=0
      4  reg->pf=10 and reg->hooknum=1
      2  reg->pf=10 and reg->hooknum=2
      6  reg->pf=10 and reg->hooknum=3
      6  reg->pf=10 and reg->hooknum=4
      4  reg->pf=2 and reg->hooknum=0
      4  reg->pf=2 and reg->hooknum=1
      2  reg->pf=2 and reg->hooknum=2
      6  reg->pf=2 and reg->hooknum=3
      6  reg->pf=2 and reg->hooknum=4
      2  reg->pf=7 and reg->hooknum=0
      2  reg->pf=7 and reg->hooknum=1
      2  reg->pf=7 and reg->hooknum=2
      4  reg->pf=7 and reg->hooknum=3

which doesn't look much better. But clearly there's a lot of those
"try to unregister stuff that you can't even find".

Maybe it tells you something.

               Linus

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Thread

slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-09 23:40 +0200
  Re: slab corruption with current -git (was Re: [git pull] vfs pile 1  (splice)) Florian Westphal <fw@strlen.de> - 2016-10-10 03:00 +0200
    Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Aaron Conole <aconole@redhat.com> - 2016-10-10 03:40 +0200
      Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-10 04:50 +0200
        Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-10 05:50 +0200
          Re: slab corruption with current -git David Miller <davem@davemloft.net> - 2016-10-10 06:00 +0200
            Re: slab corruption with current -git David Miller <davem@davemloft.net> - 2016-10-10 10:30 +0200
              Re: slab corruption with current -git Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-10 18:20 +0200
              Re: slab corruption with current -git Michal Kubecek <mkubecek@suse.cz> - 2016-10-11 15:20 +0200
                Re: slab corruption with current -git Aaron Conole <aconole@bytheb.org> - 2016-10-11 16:10 +0200
          Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Aaron Conole <aconole@redhat.com> - 2016-10-10 15:50 +0200
            Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-10 18:40 +0200
              Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-10 21:10 +0200
                Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Aaron Conole <aconole@bytheb.org> - 2016-10-10 21:20 +0200
                Re: slab corruption with current -git David Miller <davem@davemloft.net> - 2016-10-11 02:40 +0200
                Re: slab corruption with current -git Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-11 03:00 +0200
          Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-11 07:50 +0200
            Re: slab corruption with current -git (was Re: [git pull] vfs pile 1 (splice)) Linus Torvalds <torvalds@linux-foundation.org> - 2016-10-11 07:50 +0200
              Re: slab corruption with current -git David Miller <davem@davemloft.net> - 2016-10-11 11:00 +0200

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