diff options
| -rw-r--r-- | include/linux/slab.h | 6 | ||||
| -rw-r--r-- | include/linux/slab_def.h | 13 | ||||
| -rw-r--r-- | include/linux/slob_def.h | 6 | ||||
| -rw-r--r-- | mm/slab.c | 95 | ||||
| -rw-r--r-- | mm/slab_common.c | 97 | ||||
| -rw-r--r-- | mm/slob.c | 33 | ||||
| -rw-r--r-- | mm/slub.c | 63 | ||||
| -rw-r--r-- | mm/util.c | 35 |
8 files changed, 186 insertions, 162 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 0dd2dfa7beca..83d1a1454b7e 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -321,7 +321,8 @@ static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep, * request comes from. */ #if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || \ - (defined(CONFIG_SLAB) && defined(CONFIG_TRACING)) + (defined(CONFIG_SLAB) && defined(CONFIG_TRACING)) || \ + (defined(CONFIG_SLOB) && defined(CONFIG_TRACING)) extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long); #define kmalloc_track_caller(size, flags) \ __kmalloc_track_caller(size, flags, _RET_IP_) @@ -340,7 +341,8 @@ extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long); * allocation request comes from. */ #if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || \ - (defined(CONFIG_SLAB) && defined(CONFIG_TRACING)) + (defined(CONFIG_SLAB) && defined(CONFIG_TRACING)) || \ + (defined(CONFIG_SLOB) && defined(CONFIG_TRACING)) extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, unsigned long); #define kmalloc_node_track_caller(size, flags, node) \ __kmalloc_node_track_caller(size, flags, node, \ diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index 0c634fa376c9..e98caebdd0bc 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -45,7 +45,6 @@ struct kmem_cache { unsigned int colour_off; /* colour offset */ struct kmem_cache *slabp_cache; unsigned int slab_size; - unsigned int dflags; /* dynamic flags */ /* constructor func */ void (*ctor)(void *obj); @@ -112,19 +111,13 @@ void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); #ifdef CONFIG_TRACING -extern void *kmem_cache_alloc_trace(size_t size, - struct kmem_cache *cachep, gfp_t flags); -extern size_t slab_buffer_size(struct kmem_cache *cachep); +extern void *kmem_cache_alloc_trace(struct kmem_cache *, gfp_t, size_t); #else static __always_inline void * -kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags) +kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size) { return kmem_cache_alloc(cachep, flags); } -static inline size_t slab_buffer_size(struct kmem_cache *cachep) -{ - return 0; -} #endif static __always_inline void *kmalloc(size_t size, gfp_t flags) @@ -154,7 +147,7 @@ found: #endif cachep = malloc_sizes[i].cs_cachep; - ret = kmem_cache_alloc_trace(size, cachep, flags); + ret = kmem_cache_alloc_trace(cachep, flags, size); return ret; } diff --git a/include/linux/slob_def.h b/include/linux/slob_def.h index 0ec00b39d006..f28e14a12e3f 100644 --- a/include/linux/slob_def.h +++ b/include/linux/slob_def.h @@ -1,12 +1,14 @@ #ifndef __LINUX_SLOB_DEF_H #define __LINUX_SLOB_DEF_H +#include <linux/numa.h> + void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node); static __always_inline void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) { - return kmem_cache_alloc_node(cachep, flags, -1); + return kmem_cache_alloc_node(cachep, flags, NUMA_NO_NODE); } void *__kmalloc_node(size_t size, gfp_t flags, int node); @@ -26,7 +28,7 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) */ static __always_inline void *kmalloc(size_t size, gfp_t flags) { - return __kmalloc_node(size, flags, -1); + return __kmalloc_node(size, flags, NUMA_NO_NODE); } static __always_inline void *__kmalloc(size_t size, gfp_t flags) diff --git a/mm/slab.c b/mm/slab.c index c6854759bcf1..d264d90b3682 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -498,14 +498,6 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp) #endif -#ifdef CONFIG_TRACING -size_t slab_buffer_size(struct kmem_cache *cachep) -{ - return cachep->size; -} -EXPORT_SYMBOL(slab_buffer_size); -#endif - /* * Do not go above this order unless 0 objects fit into the slab or * overridden on the command line. @@ -515,13 +507,6 @@ EXPORT_SYMBOL(slab_buffer_size); static int slab_max_order = SLAB_MAX_ORDER_LO; static bool slab_max_order_set __initdata; -static inline struct kmem_cache *page_get_cache(struct page *page) -{ - page = compound_head(page); - BUG_ON(!PageSlab(page)); - return page->slab_cache; -} - static inline struct kmem_cache *virt_to_cache(const void *obj) { struct page *page = virt_to_head_page(obj); @@ -818,6 +803,7 @@ static void __slab_error(const char *function, struct kmem_cache *cachep, printk(KERN_ERR "slab error in %s(): cache `%s': %s\n", function, cachep->name, msg); dump_stack(); + add_taint(TAINT_BAD_PAGE); } /* @@ -1781,9 +1767,6 @@ void __init kmem_cache_init_late(void) slab_state = UP; - /* Annotate slab for lockdep -- annotate the malloc caches */ - init_lock_keys(); - /* 6) resize the head arrays to their final sizes */ mutex_lock(&slab_mutex); list_for_each_entry(cachep, &slab_caches, list) @@ -1791,6 +1774,9 @@ void __init kmem_cache_init_late(void) BUG(); mutex_unlock(&slab_mutex); + /* Annotate slab for lockdep -- annotate the malloc caches */ + init_lock_keys(); + /* Done! */ slab_state = FULL; @@ -2506,8 +2492,9 @@ __kmem_cache_create (const char *name, size_t size, size_t align, } #if FORCED_DEBUG && defined(CONFIG_DEBUG_PAGEALLOC) if (size >= malloc_sizes[INDEX_L3 + 1].cs_size - && cachep->object_size > cache_line_size() && ALIGN(size, align) < PAGE_SIZE) { - cachep->obj_offset += PAGE_SIZE - ALIGN(size, align); + && cachep->object_size > cache_line_size() + && ALIGN(size, cachep->align) < PAGE_SIZE) { + cachep->obj_offset += PAGE_SIZE - ALIGN(size, cachep->align); size = PAGE_SIZE; } #endif @@ -3098,7 +3085,7 @@ static inline void verify_redzone_free(struct kmem_cache *cache, void *obj) } static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp, - void *caller) + unsigned long caller) { struct page *page; unsigned int objnr; @@ -3118,7 +3105,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp, *dbg_redzone2(cachep, objp) = RED_INACTIVE; } if (cachep->flags & SLAB_STORE_USER) - *dbg_userword(cachep, objp) = caller; + *dbg_userword(cachep, objp) = (void *)caller; objnr = obj_to_index(cachep, slabp, objp); @@ -3131,7 +3118,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp, if (cachep->flags & SLAB_POISON) { #ifdef CONFIG_DEBUG_PAGEALLOC if ((cachep->size % PAGE_SIZE)==0 && OFF_SLAB(cachep)) { - store_stackinfo(cachep, objp, (unsigned long)caller); + store_stackinfo(cachep, objp, caller); kernel_map_pages(virt_to_page(objp), cachep->size / PAGE_SIZE, 0); } else { @@ -3285,7 +3272,7 @@ static inline void cache_alloc_debugcheck_before(struct kmem_cache *cachep, #if DEBUG static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, - gfp_t flags, void *objp, void *caller) + gfp_t flags, void *objp, unsigned long caller) { if (!objp) return objp; @@ -3302,7 +3289,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, poison_obj(cachep, objp, POISON_INUSE); } if (cachep->flags & SLAB_STORE_USER) - *dbg_userword(cachep, objp) = caller; + *dbg_userword(cachep, objp) = (void *)caller; if (cachep->flags & SLAB_RED_ZONE) { if (*dbg_redzone1(cachep, objp) != RED_INACTIVE || @@ -3576,8 +3563,8 @@ done: * Fallback to other node is possible if __GFP_THISNODE is not set. */ static __always_inline void * -__cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, - void *caller) +slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, + unsigned long caller) { unsigned long save_flags; void *ptr; @@ -3663,7 +3650,7 @@ __do_cache_alloc(struct kmem_cache *cachep, gfp_t flags) #endif /* CONFIG_NUMA */ static __always_inline void * -__cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller) +slab_alloc(struct kmem_cache *cachep, gfp_t flags, unsigned long caller) { unsigned long save_flags; void *objp; @@ -3799,7 +3786,7 @@ free_done: * be in this state _before_ it is released. Called with disabled ints. */ static inline void __cache_free(struct kmem_cache *cachep, void *objp, - void *caller) + unsigned long caller) { struct array_cache *ac = cpu_cache_get(cachep); @@ -3839,7 +3826,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp, */ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) { - void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0)); + void *ret = slab_alloc(cachep, flags, _RET_IP_); trace_kmem_cache_alloc(_RET_IP_, ret, cachep->object_size, cachep->size, flags); @@ -3850,14 +3837,14 @@ EXPORT_SYMBOL(kmem_cache_alloc); #ifdef CONFIG_TRACING void * -kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags) +kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size) { void *ret; - ret = __cache_alloc(cachep, flags, __builtin_return_address(0)); + ret = slab_alloc(cachep, flags, _RET_IP_); trace_kmalloc(_RET_IP_, ret, - size, slab_buffer_size(cachep), flags); + size, cachep->size, flags); return ret; } EXPORT_SYMBOL(kmem_cache_alloc_trace); @@ -3866,8 +3853,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_trace); #ifdef CONFIG_NUMA void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) { - void *ret = __cache_alloc_node(cachep, flags, nodeid, - __builtin_return_address(0)); + void *ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP_); trace_kmem_cache_alloc_node(_RET_IP_, ret, cachep->object_size, cachep->size, @@ -3878,17 +3864,17 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) EXPORT_SYMBOL(kmem_cache_alloc_node); #ifdef CONFIG_TRACING -void *kmem_cache_alloc_node_trace(size_t size, - struct kmem_cache *cachep, +void *kmem_cache_alloc_node_trace(struct kmem_cache *cachep, gfp_t flags, - int nodeid) + int nodeid, + size_t size) { void *ret; - ret = __cache_alloc_node(cachep, flags, nodeid, - __builtin_return_address(0)); + ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP); + trace_kmalloc_node(_RET_IP_, ret, - size, slab_buffer_size(cachep), + size, cachep->size, flags, nodeid); return ret; } @@ -3896,34 +3882,33 @@ EXPORT_SYMBOL(kmem_cache_alloc_node_trace); #endif static __always_inline void * -__do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller) +__do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller) { struct kmem_cache *cachep; cachep = kmem_find_general_cachep(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; - return kmem_cache_alloc_node_trace(size, cachep, flags, node); + return kmem_cache_alloc_node_trace(cachep, flags, node, size); } #if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING) void *__kmalloc_node(size_t size, gfp_t flags, int node) { - return __do_kmalloc_node(size, flags, node, - __builtin_return_address(0)); + return __do_kmalloc_node(size, flags, node, _RET_IP_); } EXPORT_SYMBOL(__kmalloc_node); void *__kmalloc_node_track_caller(size_t size, gfp_t flags, int node, unsigned long caller) { - return __do_kmalloc_node(size, flags, node, (void *)caller); + return __do_kmalloc_node(size, flags, node, caller); } EXPORT_SYMBOL(__kmalloc_node_track_caller); #else void *__kmalloc_node(size_t size, gfp_t flags, int node) { - return __do_kmalloc_node(size, flags, node, NULL); + return __do_kmalloc_node(size, flags, node, 0); } EXPORT_SYMBOL(__kmalloc_node); #endif /* CONFIG_DEBUG_SLAB || CONFIG_TRACING */ @@ -3936,7 +3921,7 @@ EXPORT_SYMBOL(__kmalloc_node); * @caller: function caller for debug tracking of the caller */ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, - void *caller) + unsigned long caller) { struct kmem_cache *cachep; void *ret; @@ -3949,9 +3934,9 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, cachep = __find_general_cachep(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; - ret = __cache_alloc(cachep, flags, caller); + ret = slab_alloc(cachep, flags, caller); - trace_kmalloc((unsigned long) caller, ret, + trace_kmalloc(caller, ret, size, cachep->size, flags); return ret; @@ -3961,20 +3946,20 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, #if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING) void *__kmalloc(size_t size, gfp_t flags) { - return __do_kmalloc(size, flags, __builtin_return_address(0)); + return __do_kmalloc(size, flags, _RET_IP_); } EXPORT_SYMBOL(__kmalloc); void *__kmalloc_track_caller(size_t size, gfp_t flags, unsigned long caller) { - return __do_kmalloc(size, flags, (void *)caller); + return __do_kmalloc(size, flags, caller); } EXPORT_SYMBOL(__kmalloc_track_caller); #else void *__kmalloc(size_t size, gfp_t flags) { - return __do_kmalloc(size, flags, NULL); + return __do_kmalloc(size, flags, 0); } EXPORT_SYMBOL(__kmalloc); #endif @@ -3995,7 +3980,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp) debug_check_no_locks_freed(objp, cachep->object_size); if (!(cachep->flags & SLAB_DEBUG_OBJECTS)) debug_check_no_obj_freed(objp, cachep->object_size); - __cache_free(cachep, objp, __builtin_return_address(0)); + __cache_free(cachep, objp, _RET_IP_); local_irq_restore(flags); trace_kmem_cache_free(_RET_IP_, objp); @@ -4026,7 +4011,7 @@ void kfree(const void *objp) debug_check_no_locks_freed(objp, c->object_size); debug_check_no_obj_freed(objp, c->object_size); - __cache_free(c, (void *)objp, __builtin_return_address(0)); + __cache_free(c, (void *)objp, _RET_IP_); local_irq_restore(flags); } EXPORT_SYMBOL(kfree); diff --git a/mm/slab_common.c b/mm/slab_common.c index aa3ca5bb01b5..8cf8b4962d6c 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -23,49 +23,17 @@ enum slab_state slab_state; LIST_HEAD(slab_caches); DEFINE_MUTEX(slab_mutex); -/* - * kmem_cache_create - Create a cache. - * @name: A string which is used in /proc/slabinfo to identify this cache. - * @size: The size of objects to be created in this cache. - * @align: The required alignment for the objects. - * @flags: SLAB flags - * @ctor: A constructor for the objects. - * - * Returns a ptr to the cache on success, NULL on failure. - * Cannot be called within a interrupt, but can be interrupted. - * The @ctor is run when new pages are allocated by the cache. - * - * The flags are - * - * %SLAB_POISON - Poison the slab with a known test pattern (a5a5a5a5) - * to catch references to uninitialised memory. - * - * %SLAB_RED_ZONE - Insert `Red' zones around the allocated memory to check - * for buffer overruns. - * - * %SLAB_HWCACHE_ALIGN - Align the objects in this cache to a hardware - * cacheline. This can be beneficial if you're counting cycles as closely - * as davem. - */ - -struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align, - unsigned long flags, void (*ctor)(void *)) +#ifdef CONFIG_DEBUG_VM +static int kmem_cache_sanity_check(const char *name, size_t size) { struct kmem_cache *s = NULL; -#ifdef CONFIG_DEBUG_VM if (!name || in_interrupt() || size < sizeof(void *) || size > KMALLOC_MAX_SIZE) { - printk(KERN_ERR "kmem_cache_create(%s) integrity check" - " failed\n", name); - goto out; + pr_err("kmem_cache_create(%s) integrity check failed\n", name); + return -EINVAL; } -#endif - get_online_cpus(); - mutex_lock(&slab_mutex); - -#ifdef CONFIG_DEBUG_VM list_for_each_entry(s, &slab_caches, list) { char tmp; int res; @@ -77,36 +45,67 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align */ res = probe_kernel_address(s->name, tmp); if (res) { - printk(KERN_ERR - "Slab cache with size %d has lost its name\n", + pr_err("Slab cache with size %d has lost its name\n", s->object_size); continue; } if (!strcmp(s->name, name)) { - printk(KERN_ERR "kmem_cache_create(%s): Cache name" - " already exists.\n", - name); + pr_err("%s (%s): Cache name already exists.\n", + __func__, name); dump_stack(); s = NULL; - goto oops; + return -EINVAL; } } WARN_ON(strchr(name, ' ')); /* It confuses parsers */ + return 0; +} +#else +static inline int kmem_cache_sanity_check(const char *name, size_t size) +{ + return 0; +} #endif - s = __kmem_cache_create(name, size, align, flags, ctor); +/* + * kmem_cache_create - Create a cache. + * @name: A string which is used in /proc/slabinfo to identify this cache. + * @size: The size of objects to be created in this cache. + * @align: The required alignment for the objects. + * @flags: SLAB flags + * @ctor: A constructor for the objects. + * + * Returns a ptr to the cache on success, NULL on failure. + * Cannot be called within a interrupt, but can be interrupted. + * The @ctor is run when new pages are allocated by the cache. + * + * The flags are + * + * %SLAB_POISON - Poison the slab with a known test pattern (a5a5a5a5) + * to catch references to uninitialised memory. + * + * %SLAB_RED_ZONE - Insert `Red' zones around the allocated memory to check + * for buffer overruns. + * + * %SLAB_HWCACHE_ALIGN - Align the objects in this cache to a hardware + * cacheline. This can be beneficial if you're counting cycles as closely + * as davem. + */ + +struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align, + unsigned long flags, void (*ctor)(void *)) +{ + struct kmem_cache *s = NULL; -#ifdef CONFIG_DEBUG_VM -oops: -#endif + get_online_cpus(); + mutex_lock(&slab_mutex); + if (kmem_cache_sanity_check(name, size) == 0) + s = __kmem_cache_create(name, size, align, flags, ctor); mutex_unlock(&slab_mutex); put_online_cpus(); -#ifdef CONFIG_DEBUG_VM -out: -#endif if (!s && (flags & SLAB_PANIC)) panic("kmem_cache_create: Failed to create slab '%s'\n", name); diff --git a/mm/slob.c b/mm/slob.c index 45d4ca79933a..dd47d16d57b6 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -194,7 +194,7 @@ static void *slob_new_pages(gfp_t gfp, int order, int node) void *page; #ifdef CONFIG_NUMA - if (node != -1) + if (node != NUMA_NO_NODE) page = alloc_pages_exact_node(node, gfp, order); else #endif @@ -290,7 +290,7 @@ static void *slob_alloc(size_t size, gfp_t gfp, int align, int node) * If there's a node specification, search for a partial * page with a matching node id in the freelist. */ - if (node != -1 && page_to_nid(sp) != node) + if (node != NUMA_NO_NODE && page_to_nid(sp) != node) continue; #endif /* Enough room on this page? */ @@ -425,7 +425,8 @@ out: * End of slob allocator proper. Begin kmem_cache_alloc and kmalloc frontend. */ -void *__kmalloc_node(size_t size, gfp_t gfp, int node) +static __always_inline void * +__do_kmalloc_node(size_t size, gfp_t gfp, int node, unsigned long caller) { unsigned int *m; int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); @@ -446,7 +447,7 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node) *m = size; ret = (void *)m + align; - trace_kmalloc_node(_RET_IP_, ret, + trace_kmalloc_node(caller, ret, size, size + align, gfp, node); } else { unsigned int order = get_order(size); @@ -460,15 +461,35 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node) page->private = size; } - trace_kmalloc_node(_RET_IP_, ret, + trace_kmalloc_node(caller, ret, size, PAGE_SIZE << order, gfp, node); } kmemleak_alloc(ret, size, 1, gfp); return ret; } + +void *__kmalloc_node(size_t size, gfp_t gfp, int node) +{ + return __do_kmalloc_node(size, gfp, node, _RET_IP_); +} EXPORT_SYMBOL(__kmalloc_node); +#ifdef CONFIG_TRACING +void *__kmalloc_track_caller(size_t size, gfp_t gfp, unsigned long caller) +{ + return __do_kmalloc_node(size, gfp, NUMA_NO_NODE, caller); +} + +#ifdef CONFIG_NUMA +void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags, + int node, unsigned long caller) +{ + return __do_kmalloc_node(size, gfp, node, caller); +} +#endif +#endif + void kfree(const void *block) { struct page *sp; @@ -514,7 +535,7 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size, struct kmem_cache *c; c = slob_alloc(sizeof(struct kmem_cache), - GFP_KERNEL, ARCH_KMALLOC_MINALIGN, -1); + GFP_KERNEL, ARCH_KMALLOC_MINALIGN, NUMA_NO_NODE); if (c) { c->name = name; diff --git a/mm/slub.c b/mm/slub.c index 2fdd96f9e998..97a49d9a37cd 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -568,6 +568,8 @@ static void slab_bug(struct kmem_cache *s, char *fmt, ...) printk(KERN_ERR "BUG %s (%s): %s\n", s->name, print_tainted(), buf); printk(KERN_ERR "----------------------------------------" "-------------------------------------\n\n"); + + add_taint(TAINT_BAD_PAGE); } static void slab_fix(struct kmem_cache *s, char *fmt, ...) @@ -1069,13 +1071,13 @@ bad: return 0; } -static noinline int free_debug_processing(struct kmem_cache *s, - struct page *page, void *object, unsigned long addr) +static noinline struct kmem_cache_node *free_debug_processing( + struct kmem_cache *s, struct page *page, void *object, + unsigned long addr, unsigned long *flags) { - unsigned long flags; - int rc = 0; + struct kmem_cache_node *n = get_node(s, page_to_nid(page)); - local_irq_save(flags); + spin_lock_irqsave(&n->list_lock, *flags); slab_lock(page); if (!check_slab(s, page)) @@ -1113,15 +1115,19 @@ static noinline int free_debug_processing(struct kmem_cache *s, set_track(s, object, TRACK_FREE, addr); trace(s, page, object, 0); init_object(s, object, SLUB_RED_INACTIVE); - rc = 1; out: slab_unlock(page); - local_irq_restore(flags); - return rc; + /* + * Keep node_lock to preserve integrity + * until the object is actually freed + */ + return n; fail: + slab_unlock(page); + spin_unlock_irqrestore(&n->list_lock, *flags); slab_fix(s, "Object at 0x%p not freed", object); - goto out; + return NULL; } static int __init setup_slub_debug(char *str) @@ -1214,8 +1220,9 @@ static inline void setup_object_debug(struct kmem_cache *s, static inline int alloc_debug_processing(struct kmem_cache *s, struct page *page, void *object, unsigned long addr) { return 0; } -static inline int free_debug_processing(struct kmem_cache *s, - struct page *page, void *object, unsigned long addr) { return 0; } +static inline struct kmem_cache_node *free_debug_processing( + struct kmem_cache *s, struct page *page, void *object, + unsigned long addr, unsigned long *flags) { return NULL; } static inline int slab_pad_check(struct kmem_cache *s, struct page *page) { return 1; } @@ -1714,7 +1721,7 @@ static inline void note_cmpxchg_failure(const char *n, stat(s, CMPXCHG_DOUBLE_CPU_FAIL); } -void init_kmem_cache_cpus(struct kmem_cache *s) +static void init_kmem_cache_cpus(struct kmem_cache *s) { int cpu; @@ -1939,7 +1946,7 @@ static void unfreeze_partials(struct kmem_cache *s) * If we did not find a slot then simply move all the partials to the * per node partial list. */ -int put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) +static int put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) { struct page *oldpage; int pages; @@ -1962,6 +1969,7 @@ int put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) local_irq_save(flags); unfreeze_partials(s); local_irq_restore(flags); + oldpage = NULL; pobjects = 0; pages = 0; stat(s, CPU_PARTIAL_DRAIN); @@ -2310,7 +2318,7 @@ new_slab: * * Otherwise we can simply pick the next object from the lockless free list. */ -static __always_inline void *slab_alloc(struct kmem_cache *s, +static __always_inline void *slab_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node, unsigned long addr) { void **object; @@ -2380,9 +2388,15 @@ redo: return object; } +static __always_inline void *slab_alloc(struct kmem_cache *s, + gfp_t gfpflags, unsigned long addr) +{ + return slab_alloc_node(s, gfpflags, NUMA_NO_NODE, addr); +} + void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) { - void *ret = slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_); + void *ret = slab_alloc(s, gfpflags, _RET_IP_); trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size, s->size, gfpflags); @@ -2393,7 +2407,7 @@ EXPORT_SYMBOL(kmem_cache_alloc); #ifdef CONFIG_TRACING void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size) { - void *ret = slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_); + void *ret = slab_alloc(s, gfpflags, _RET_IP_); trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags); return ret; } @@ -2411,7 +2425,7 @@ EXPORT_SYMBOL(kmalloc_order_trace); #ifdef CONFIG_NUMA void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node) { - void *ret = slab_alloc(s, gfpflags, node, _RET_IP_); + void *ret = slab_alloc_node(s, gfpflags, node, _RET_IP_); trace_kmem_cache_alloc_node(_RET_IP_, ret, s->object_size, s->size, gfpflags, node); @@ -2425,7 +2439,7 @@ void *kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags, int node, size_t size) { - void *ret = slab_alloc(s, gfpflags, node, _RET_IP_); + void *ret = slab_alloc_node(s, gfpflags, node, _RET_IP_); trace_kmalloc_node(_RET_IP_, ret, size, s->size, gfpflags, node); @@ -2457,7 +2471,8 @@ static void __slab_free(struct kmem_cache *s, struct page *page, stat(s, FREE_SLOWPATH); - if (kmem_cache_debug(s) && !free_debug_processing(s, page, x, addr)) + if (kmem_cache_debug(s) && + !(n = free_debug_processing(s, page, x, addr, &flags))) return; do { @@ -3362,7 +3377,7 @@ void *__kmalloc(size_t size, gfp_t flags) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, flags, NUMA_NO_NODE, _RET_IP_); + ret = slab_alloc(s, flags, _RET_IP_); trace_kmalloc(_RET_IP_, ret, size, s->size, flags); @@ -3405,7 +3420,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, flags, node, _RET_IP_); + ret = slab_alloc_node(s, flags, node, _RET_IP_); trace_kmalloc_node(_RET_IP_, ret, size, s->size, flags, node); @@ -3482,7 +3497,7 @@ void kfree(const void *x) if (unlikely(!PageSlab(page))) { BUG_ON(!PageCompound(page)); kmemleak_free(x); - put_page(page); + __free_pages(page, compound_order(page)); return; } slab_free(page->slab, page, object, _RET_IP_); @@ -4033,7 +4048,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller) if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, gfpflags, NUMA_NO_NODE, caller); + ret = slab_alloc(s, gfpflags, caller); /* Honor the call site pointer we received. */ trace_kmalloc(caller, ret, size, s->size, gfpflags); @@ -4063,7 +4078,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags, if (unlikely(ZERO_OR_NULL_PTR(s))) return s; - ret = slab_alloc(s, gfpflags, node, caller); + ret = slab_alloc_node(s, gfpflags, node, caller); /* Honor the call site pointer we received. */ trace_kmalloc_node(caller, ret, size, s->size, gfpflags, node); diff --git a/mm/util.c b/mm/util.c index 8c7265afa29f..dc3036cdcc6a 100644 --- a/mm/util.c +++ b/mm/util.c @@ -105,6 +105,25 @@ void *memdup_user(const void __user *src, size_t len) } EXPORT_SYMBOL(memdup_user); +static __always_inline void *__do_krealloc(const void *p, size_t new_size, + gfp_t flags) +{ + void *ret; + size_t ks = 0; + + if (p) + ks = ksize(p); + + if (ks >= new_size) + return (void *)p; + + ret = kmalloc_track_caller(new_size, flags); + if (ret && p) + memcpy(ret, p, ks); + + return ret; +} + /** * __krealloc - like krealloc() but don't free @p. * @p: object to reallocate memory for. @@ -117,23 +136,11 @@ EXPORT_SYMBOL(memdup_user); */ void *__krealloc(const void *p, size_t new_size, gfp_t flags) { - void *ret; - size_t ks = 0; - if (unlikely(!new_size)) return ZERO_SIZE_PTR; - if (p) - ks = ksize(p); + return __do_krealloc(p, new_size, flags); - if (ks >= new_size) - return (void *)p; - - ret = kmalloc_track_caller(new_size, flags); - if (ret && p) - memcpy(ret, p, ks); - - return ret; } EXPORT_SYMBOL(__krealloc); @@ -157,7 +164,7 @@ void *krealloc(const void *p, size_t new_size, gfp_t flags) return ZERO_SIZE_PTR; } - ret = __krealloc(p, new_size, flags); + ret = __do_krealloc(p, new_size, flags); if (ret && p != ret) kfree(p); |