From: Guenter Roeck <linux@roeck-us•net>
To: Al Viro <viro@ZenIV•linux.org.uk>, Paul Moore <pmoore@redhat•com>
Cc: Sabrina Dubroca <sd@queasysnail•net>,
Thierry Reding <thierry.reding@gmail•com>,
Stephen Rothwell <sfr@canb•auug.org.au>,
linux-next@vger•kernel.org, linux-kernel@vger•kernel.org,
linux-fsdevel@vger•kernel.org, linux-audit@redhat•com,
Richard Guy Briggs <rgb@redhat•com>
Subject: Re: linux-next: Tree for Jan 20 -- Kernel panic - Unable to mount root fs
Date: Wed, 21 Jan 2015 09:51:15 -0800 [thread overview]
Message-ID: <54BFE713.20807@roeck-us.net> (raw)
In-Reply-To: <20150121173810.GP29656@ZenIV.linux.org.uk>
On 01/21/2015 09:38 AM, Al Viro wrote:
> On Wed, Jan 21, 2015 at 11:16:23AM -0500, Paul Moore wrote:
>> On Wednesday, January 21, 2015 04:54:07 PM Sabrina Dubroca wrote:
>>> 2015-01-21, 16:39:12 +0100, Thierry Reding wrote:
>>>> That doesn't seem to help, at least in my case.
>>>
>>> Same here.
>>
>> Okay, thanks for trying. Sorry that didn't resolve things.
>>
>>> Well, it's probably not an audit issue. I tried audit=0 on the
>>> commandline, and I just rebuilt a kernel with CONFIG_AUDIT=n, and it's
>>> still panicing. This should have fixed any audit-related issue,
>>> right?
>>
>> Most likely. Back to the code I go ...
>
> FWIW, I really wonder if populate_rootfs() (run ultimately from
> kernel_init(), by way of kernel_init_freeable(), do_basic_setup() and
> do_initcalls()) ends up with some side effects as far as struct filename
> are concerned...
>
> Note that if we _ever_ hit reuse logics there, we are going to get bogus
> matches asoddingplenty - *all* those sys_mkdir(), etc. are going to be
> with filenames in the same reused buffer. So if anything in there leaks
> from one call to another, we are going to have a mess on hands.
>
> Another place where that can be a problem is devtmpfs - there's a kernel
> thread doing actual mkdir, mknod, etc. in that abomination and if _that_
> ends up accumulating aushit entries, we'll end up with interesting problems.
>
> Folks, could you print the value of audit_dummy_context() in populate_rootfs()
> and in drivers/base/devtmpfs.c:devtmpfsd()?
>
populate_rootfs: audit_dummy_context() returns 1
Guenter
next prev parent reply other threads:[~2015-01-21 17:51 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-20 7:53 linux-next: Tree for Jan 20 Stephen Rothwell
2015-01-20 14:16 ` Guenter Roeck
2015-01-20 16:56 ` linux-next: Tree for Jan 20 -- Kernel panic - Unable to mount root fs Sabrina Dubroca
2015-01-20 17:39 ` Paul Moore
2015-01-20 17:51 ` Sabrina Dubroca
2015-01-20 19:54 ` Al Viro
2015-01-20 20:45 ` Sabrina Dubroca
2015-01-20 21:02 ` Al Viro
2015-01-20 21:38 ` Sabrina Dubroca
2015-01-20 21:58 ` Al Viro
2015-01-20 22:08 ` Sabrina Dubroca
2015-01-20 22:13 ` Guenter Roeck
2015-01-20 22:50 ` Al Viro
2015-01-20 23:17 ` Al Viro
2015-01-20 23:27 ` Sabrina Dubroca
2015-01-21 0:04 ` Paul Moore
2015-01-21 0:14 ` Paul Moore
2015-01-21 0:41 ` Al Viro
2015-01-21 2:44 ` Guenter Roeck
2015-01-21 3:36 ` Al Viro
2015-01-21 4:01 ` Guenter Roeck
2015-01-21 4:36 ` Al Viro
2015-01-21 11:05 ` Sabrina Dubroca
2015-01-21 13:32 ` Guenter Roeck
2015-01-21 18:29 ` Al Viro
2015-01-21 19:06 ` Guenter Roeck
2015-01-21 20:06 ` Al Viro
2015-01-21 21:03 ` Guenter Roeck
2015-01-21 21:28 ` Al Viro
2015-01-21 21:38 ` Guenter Roeck
2015-01-21 21:40 ` Sabrina Dubroca
2015-01-21 21:54 ` Paul Walmsley
2015-01-22 2:28 ` Paul Moore
2015-01-22 4:12 ` Al Viro
2015-01-22 4:49 ` Paul Moore
2015-01-21 21:30 ` Sabrina Dubroca
2015-01-21 14:42 ` Thierry Reding
2015-01-21 15:24 ` Paul Moore
2015-01-21 15:39 ` Thierry Reding
2015-01-21 15:54 ` Sabrina Dubroca
2015-01-21 16:16 ` Paul Moore
2015-01-21 17:38 ` Al Viro
2015-01-21 17:51 ` Guenter Roeck [this message]
2015-01-21 16:21 ` Guenter Roeck
2015-01-21 15:06 ` Paul Moore
2015-01-20 21:43 ` Guenter Roeck
2015-01-20 17:54 ` Fabio Estevam
2015-01-20 19:00 ` Ross Zwisler
2015-01-20 19:16 ` Fabio Estevam
2015-01-20 19:24 ` Paul Moore
2015-01-20 19:43 ` Fabio Estevam
2015-01-20 20:10 ` Paul Moore
2015-01-20 20:26 ` linux-next: Tree for Jan 20 Guenter Roeck
2015-01-20 22:54 ` Kirill A. Shutemov
2015-01-21 3:05 ` Guenter Roeck
2015-01-21 10:43 ` Kirill A. Shutemov
2015-01-21 23:34 ` Guenter Roeck
2015-01-22 3:14 ` Guenter Roeck
2015-01-22 17:13 ` linux-next: Tree for Jan 20 -- sparc32: fix broken set_pte() Kirill A. Shutemov
2015-01-22 17:27 ` Kirill A. Shutemov
2015-01-22 19:34 ` Guenter Roeck
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