diff options
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 0042fb2730d1..af0f370fe7a2 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -143,8 +143,10 @@ int slab_unmergeable(struct kmem_cache *s) if (s->ctor) return 1; +#ifdef CONFIG_HARDENED_USERCOPY if (s->usersize) return 1; +#endif /* * We may have set a slab to be unmergeable during bootstrap. @@ -223,8 +225,10 @@ static struct kmem_cache *create_cache(const char *name, s->size = s->object_size = object_size; s->align = align; s->ctor = ctor; +#ifdef CONFIG_HARDENED_USERCOPY s->useroffset = useroffset; s->usersize = usersize; +#endif err = __kmem_cache_create(s, flags); if (err) @@ -317,7 +321,8 @@ kmem_cache_create_usercopy(const char *name, flags &= CACHE_CREATE_MASK; /* Fail closed on bad usersize of useroffset values. */ - if (WARN_ON(!usersize && useroffset) || + if (!IS_ENABLED(CONFIG_HARDENED_USERCOPY) || + WARN_ON(!usersize && useroffset) || WARN_ON(size < usersize || size - usersize < useroffset)) usersize = useroffset = 0; @@ -595,8 +600,8 @@ void kmem_dump_obj(void *object) ptroffset = ((char *)object - (char *)kp.kp_objp) - kp.kp_data_offset; pr_cont(" pointer offset %lu", ptroffset); } - if (kp.kp_slab_cache && kp.kp_slab_cache->usersize) - pr_cont(" size %u", kp.kp_slab_cache->usersize); + if (kp.kp_slab_cache && kp.kp_slab_cache->object_size) + pr_cont(" size %u", kp.kp_slab_cache->object_size); if (kp.kp_ret) pr_cont(" allocated at %pS\n", kp.kp_ret); else @@ -640,8 +645,10 @@ void __init create_boot_cache(struct kmem_cache *s, const char *name, align = max(align, size); s->align = calculate_alignment(flags, align, size); +#ifdef CONFIG_HARDENED_USERCOPY s->useroffset = useroffset; s->usersize = usersize; +#endif err = __kmem_cache_create(s, flags); |