linux-kernel - Re: linux-next 20141216 BUG: sleeping function called from invalid context at mm/slab.c:2849

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Date:	Thu, 18 Dec 2014 11:45:16 -0500
From:	Valdis.Kletnieks@...edu
To:	Paul Moore <paul@...l-moore.com>,
	Eric Paris <eparis@...isplace.org>,
	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov
Subject: Re: linux-next 20141216 BUG: sleeping function called from invalid context at mm/slab.c:2849

On Tue, 16 Dec 2014 20:09:54 -0500, Valdis Kletnieks said:

> Spotted these two while booting single-user on 20141216.  20141208
> doesn't throw these, so it's something in the last week or so..

Gaah!  Turns out that 20141208 *is* susceptible - it had been booting
just fine for several days, but it went around the bend, apparently due
to a userspace or initrd change.

egrep 'BUG|Linux vers' from my syslog:

Dec  9 12:19:53 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec  9 21:19:53 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 10 12:39:45 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 10 20:56:28 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 11 10:46:49 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 11 23:53:10 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 11:13:19 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 19:26:24 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 19:33:32 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 19:42:30 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 20:00:39 turing-police kernel: [ 1109.635328] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:00:43 turing-police kernel: [ 1113.680912] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:33:15 turing-police kernel: [ 3062.345461] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:37:48 turing-police kernel: [ 3335.788891] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:41:57 turing-police kernel: [ 3584.265255] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:42:47 turing-police kernel: [ 3633.863552] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 20:51:33 turing-police kernel: [    0.000000] Linux version 3.18.0-next-20141208 (source@...ing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014
Dec 12 21:51:04 turing-police kernel: [ 3587.132867] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 22:20:01 turing-police kernel: [ 5322.313024] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 12 23:06:00 turing-police kernel: [ 8077.463289] BUG: sleeping function called from invalid context at mm/slab.c:2849
Dec 13 00:00:05 turing-police kernel: [11318.405826] BUG: sleeping function called from invalid context at mm/slab.c:2849

I need to figure out what changed around 7:30PM on the 12th.


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