On Tue, 2020-12-15 at 19:28 +0800, Kuan-Ying Lee wrote: > When cpu is going offline, set q->offline as true > and interrupt happened. The interrupt may call the > quarantine_put. But quarantine_put do not free the > the object. The object will cause memory leak. > > Add qlink_free() to free the object. > > Signed-off-by: Kuan-Ying Lee <[email protected]> > Cc: Andrey Ryabinin <[email protected]> > Cc: Alexander Potapenko <[email protected]> > Cc: Dmitry Vyukov <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: Matthias Brugger <[email protected]> > Cc: <[email protected]> [5.10-] > --- > mm/kasan/quarantine.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c > index 0e3f8494628f..cac7c617df72 100644 > --- a/mm/kasan/quarantine.c > +++ b/mm/kasan/quarantine.c > @@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_meta *info, struct > kmem_cache *cache) > > q = this_cpu_ptr(&cpu_quarantine); > if (q->offline) { > + qlink_free(&info->quarantine_link, cache); > local_irq_restore(flags); > return; > }
Sorry. Please ignore this patch. Thanks.
