On Wed, 27 Apr 2016 10:20:59 -0700 Thomas Garnier <thgar...@google.com> wrote:
> Provides an optional config (CONFIG_SLAB_FREELIST_RANDOM) to randomize > the SLAB freelist. Forgot this bit? From: Andrew Morton <a...@linux-foundation.org> Subject: mm-slab-freelist-randomization-v5-fix propagate gfp_t into cache_random_seq_create() Cc: Christoph Lameter <c...@linux.com> Cc: David Rientjes <rient...@google.com> Cc: Greg Thelen <gthe...@google.com> Cc: Joonsoo Kim <iamjoonsoo....@lge.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Laura Abbott <labb...@fedoraproject.org> Cc: Pekka Enberg <penb...@kernel.org> Cc: Thomas Garnier <thgar...@google.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> --- a/mm/slab.c~mm-slab-freelist-randomization-v5-fix +++ a/mm/slab.c @@ -1262,7 +1262,7 @@ static void freelist_randomize(struct rn } /* Create a random sequence per cache */ -static int cache_random_seq_create(struct kmem_cache *cachep) +static int cache_random_seq_create(struct kmem_cache *cachep, gfp_t gfp) { unsigned int seed, count = cachep->num; struct rnd_state state; @@ -1271,7 +1271,7 @@ static int cache_random_seq_create(struc return 0; /* If it fails, we will just use the global lists */ - cachep->random_seq = kcalloc(count, sizeof(freelist_idx_t), GFP_KERNEL); + cachep->random_seq = kcalloc(count, sizeof(freelist_idx_t), gfp); if (!cachep->random_seq) return -ENOMEM; @@ -1290,7 +1290,7 @@ static void cache_random_seq_destroy(str cachep->random_seq = NULL; } #else -static inline int cache_random_seq_create(struct kmem_cache *cachep) +static inline int cache_random_seq_create(struct kmem_cache *cachep, gfp_t gfp) { return 0; } @@ -3999,7 +3999,7 @@ static int enable_cpucache(struct kmem_c int shared = 0; int batchcount = 0; - err = cache_random_seq_create(cachep); + err = cache_random_seq_create(cachep, gfp); if (err) goto end; _