On Tue, Nov 07, 2017 at 11:09:50AM -0800, Shaohua Li wrote: > kthread() could bail out early before we initialize blkcg_css (if the > kthread is killed very early. Please see xchg() statement in kthread()), > which confuses free_kthread_struct. Instead of moving the blkcg_css > initialization early, we simply zero the whole 'self' data structure, > which doesn't sound much overhead. > > Reported-by: syzbot <[email protected]> > Fixes: 05e3db95ebfc ("kthread: add a mechanism to store cgroup info") > Cc: Andrew Morton <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Tejun Heo <[email protected]> > Cc: Dmitry Vyukov <[email protected]> > Signed-off-by: Shaohua Li <[email protected]>
Acked-by: Tejun Heo <[email protected]> Thanks. -- tejun
