add slub sanitization

1 files changed, 7 insertions, 0 deletions

diff --git a/mm/slub.c b/mm/slub.c
index b3d553072..05895b54a 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2830,6 +2830,13 @@ static __always_inline void slab_free(struct kmem_cache *s,
 
 	slab_free_hook(s, x);
 
+	if (!(s->flags & (SLAB_DESTROY_BY_RCU | SLAB_POISON))) {
+		size_t offset = s->offset ? 0 : sizeof(void *);
+		memset(x + offset, 0, s->object_size - offset);
+		if (s->ctor)
+			s->ctor(x);
+	}
+
 redo:
 	/*
 	 * Determine the currently cpus per cpu slab.