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Re: Kernel 4.1.6 Panic due to slab corruption

From Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Newsgroups linux.kernel
Subject Re: Kernel 4.1.6 Panic due to slab corruption
Date 2015-09-07 14:00 +0200
Message-ID <q63fA-4Fg-5@gated-at.bofh.it> (permalink)
References <q60hH-tJ-3@gated-at.bofh.it> <q620a-2XP-5@gated-at.bofh.it> <q62We-4iH-13@gated-at.bofh.it> <q635T-4u5-3@gated-at.bofh.it>
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On Mon, 07 Sep 2015 11:49:12 +0000, Holger Hoffstätte wrote:

> On Mon, 07 Sep 2015 14:30:49 +0300, Nikolay Borisov wrote:
> 
>> If you have the vmlinux image for the kernel you were running at the
>> time, the crash occured, could you post the output of addr2line -f -e
>> path/to/vmlinux ffffffff8115bd4d to see if it also fails in
>> get_freepointer.
> 
> Had to rebuild to get an uncompressed vmlinux, but here it is:
> 
> holger>addr2line -f -e vmlinux ffffffff8115bd4d
> kmem_cache_alloc
> ??:?
> 
> Not sure how much we can learn from this. :}

Also for what it's worth the related splatter is all in the same place:

holger>zgrep ffffffff8115bd4d /var/log/kern.log.0.gz 
Sep  5 20:42:02 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:02 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:03 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:03 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:03 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: IP: [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: RIP: 0010:[<ffffffff8115bd4d>]  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160
Sep  5 20:42:10 ragnarok kernel: RIP  [<ffffffff8115bd4d>] kmem_cache_alloc+0x6d/0x160

CPU is a 4 core HT i7 (aka 8 vcores), and so I have 8 splats.

thanks,

Holger

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Thread

Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-07 10:50 +0200
  Re: Kernel 4.1.6 Panic due to slab corruption Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-09-07 12:40 +0200
    Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-07 13:40 +0200
      Re: Kernel 4.1.6 Panic due to slab corruption Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-09-07 13:50 +0200
        Re: Kernel 4.1.6 Panic due to slab corruption Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-09-07 14:00 +0200
  Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-07 13:20 +0200
    Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-08 16:00 +0200
      Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-08 16:10 +0200
        Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-08 16:30 +0200
          Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-08 16:50 +0200
            Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-08 17:20 +0200
              Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-09 13:50 +0200
                Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-09 16:10 +0200
                Re: Kernel 4.1.6 Panic due to slab corruption Vlastimil Babka <vbabka@suse.cz> - 2015-09-09 18:30 +0200
                Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-09 20:00 +0200
                Re: Kernel 4.1.6 Panic due to slab corruption Nikolay Borisov <kernel@kyup.com> - 2015-09-10 08:20 +0200
                Re: Kernel 4.1.6 Panic due to slab corruption Christoph Lameter <cl@linux.com> - 2015-09-10 18:40 +0200

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