From: Miaohe Lin <linmiaohe@huawei.com> stable inclusion from stable-v5.10.76 commit 568f906340b43120abd6fcc67c37396482f85930 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RC3G CVE: CVE-2021-47466 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 9037c57681d25e4dcc442d940d6dbe24dd31f461 upstream. In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources. Link: https://lkml.kernel.org/r/20210916123920.48704-4-linmiaohe@huawei.com Fixes: 210e7a43fa90 ("mm: SLUB freelist randomization") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Bharata B Rao <bharata@linux.ibm.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Faiyaz Mohammed <faiyazm@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <keescook@chromium.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <guro@fb.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ze Zuo <zuoze1@huawei.com> --- mm/slub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slub.c b/mm/slub.c index 150362a663f61..a67bcc57a7704 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3669,8 +3669,8 @@ static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags) if (alloc_kmem_cache_cpus(s)) return 0; - free_kmem_cache_nodes(s); error: + __kmem_cache_release(s); return -EINVAL; } -- 2.25.1