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Date: Fri, 26 Sep 2014 07:59:09 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Gleb Smirnoff <glebius@FreeBSD.org>
Subject: Re: Panic - uma_zfree_arg - zone argument is NULL
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On 09/26/14 07:51, Hans Petter Selasky wrote:
> On 09/25/14 11:19, Gleb Smirnoff wrote:
>> On Thu, Sep 18, 2014 at 02:03:44PM +0200, Hans Petter Selasky wrote:
>> H> #7  0xffffffff80b07863 in uma_zfree_arg (zone=0x0,
>> item=0xfffff800114ee000,
>> H>      udata=0xffffffff81484760)
>>
>> udata here is uma_slab_t. Can you look at it?
>>
>> btw, is that reproducible on stable/10 or head?
>>
>
> Yes, it is reproducible. I have not tried stable/10 or head yet.
>
> (kgdb) print *(uma_slab_t)udata
> $3 = {
>    us_keg = 0xfffff8085696d680,
>    us_type = {
>      _us_link = {
>        le_next = 0xfffff80856970a80,
>        le_prev = 0x3
>      },
>      _us_size = 18446735313429006976
>    },
>    us_hlink = {
>      sle_next = 0x0
>    },
>    us_data = 0xffffffff81484778 "",
>    us_free = {
>      __bits = {0, 0, -2125969520, 0}
>    },
>    us_freecount = 0,
>    us_flags = 0 '\0',
>    us_pad = 0 '\0'
> }
>

BTW: I don't rule out that this might be an indirect error of some other 
kernel modules which I am experimenting with currently. But if you see 
something which is obvious then please let me know.

--HPS