CVE-2022-48649 mm/slab_common: fix possible double free of kmem_cache

In the Linux kernel, the following vulnerability has been resolved: mm/slabcommon: fix possible double free of kmemcache When doing slubdebug test, kfence's 'testmemcachetypesafebyrcu' kunit test case cause a use-after-free error: BUG: KASAN: use-after-free in kobjectdel+0x14/0x30 Read of size 8 ...