NFSv4.2: Fix missing removal of SLAB_ACCOUNT on kmem_cache allocation

The commit 173d3bcf42d6 ("NFSv4.2: Fix up an invalid combination of memory
allocation flags") has stripped GFP_KERNEL_ACCOUNT down to GFP_KERNEL,
however, it forgot to remove SLAB_ACCOUNT from kmem_cache allocation.
It means that memory is still limited by kmemcg.  This patch also fix a
NULL pointer reference issue [1] reported by NeilBrown.

Link: https://lore.kernel.org/all/164870069595.25542.17292003658915487357@noble.neil.brown.name/
Fixes: 173d3bcf42d6 ("NFSv4.2: Fix up an invalid combination of memory allocation flags")
Fixes: ee50c20a0c65 ("mm: list_lru: allocate list_lru_one only when needed")
Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/nfs42xattr.c b/fs/nfs/nfs42xattr.c
index ad3405c64b9e428815fba562792f37fcaa4a8025..e7b34f7e0614b6ff47836777c98fd21a07ba054d 100644 (file)
--- a/fs/nfs/nfs42xattr.c
+++ b/fs/nfs/nfs42xattr.c
@@ -997,7 +997,7 @@ int __init nfs4_xattr_cache_init(void)
 
        nfs4_xattr_cache_cachep = kmem_cache_create("nfs4_xattr_cache_cache",
            sizeof(struct nfs4_xattr_cache), 0,
-           (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+           (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
            nfs4_xattr_cache_init_once);
        if (nfs4_xattr_cache_cachep == NULL)
                return -ENOMEM;