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; } -- 2.18.0
