slob: Fix early boot kernel crash

Commit fd3142a59af2012a7c5dc72ec97a4935ff1c5fc6 broke
slob since a piece of a change for a later patch slipped into
it.

Fengguang Wu writes:

  The commit crashes the kernel w/o any dmesg output (the attached one is
  created by the script as a summary for that run). This is very
  reproducible in kvm for the attached config.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/mm/slob.c b/mm/slob.c
index 0111e0d..45d4ca7 100644 (file)
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -518,7 +518,7 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
 
        if (c) {
                c->name = name;
-               c->size = c->object_size;
+               c->size = size;
                if (flags & SLAB_DESTROY_BY_RCU) {
                        /* leave room for rcu footer at the end of object */
                        c->size += sizeof(struct slob_rcu);