Re: linux-next 20141216 BUG: sleeping function called from invalid context at mm/slab.c:2849
On 14/12/18, Eric Paris wrote:
On Thu, 2014-12-18 at 11:45 -0500, Valdis.Kletnieks(a)vt.edu wrote:
> 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.
$5 says you updated systemd?
Richard?
Ok, so if you are correct, then either we justify dropping the lock (I
assume the one commone to both BUG reports [sig->cred_guard_mutex] ),
or we make yet another queue were were hoping to avoid...
It would also be good to narrow it down to a rule that triggers this.
> 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(a)turing-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(a)turing-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 20:42:47 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(a)turing-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
...
> I need to figure out what changed around 7:30PM on the 12th.
- RGB
--
Richard Guy Briggs <rbriggs(a)redhat.com>
Senior Software Engineer, Kernel Security, AMER ENG Base Operating Systems, Red Hat
Remote, Ottawa, Canada
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