[lkml]   [2019]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: INFO: rcu detected stall in ext4_write_checks
On Sun, Jul 14, 2019 at 11:49:15AM -0700, Paul E. McKenney wrote:
> On Sun, Jul 14, 2019 at 05:48:00PM +0300, Dmitry Vyukov wrote:
> > But short term I don't see any other solution than stop testing
> > sched_setattr because it does not check arguments enough to prevent
> > system misbehavior. Which is a pity because syzkaller has found some
> > bad misconfigurations that were oversight on checking side.
> > Any other suggestions?
> Keep the times down to a few seconds? Of course, that might also
> fail to find interesting bugs.

Right, if syzcaller can put a limit on the period/deadline parameters
(and make sure to not write "-1" to
/proc/sys/kernel/sched_rt_runtime_us) then per the in-kernel
access-control should not allow these things to happen.

 \ /
  Last update: 2019-07-15 15:31    [W:0.077 / U:13.312 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site