mm/slab: enable slab allocation tagging for kmalloc and friends

Redefine kmalloc, krealloc, kzalloc, kcalloc, etc. to record allocations
and deallocations done by these functions.

[surenb@google.com: undo _noprof additions in the documentation]
  Link: https://lkml.kernel.org/r/20240326231453.1206227-7-surenb@google.com
[rdunlap@infradead.org: fix kcalloc() kernel-doc warnings]
  Link: https://lkml.kernel.org/r/20240327044649.9199-1-rdunlap@infradead.org
Link: https://lkml.kernel.org/r/20240321163705.3067592-26-surenb@google.comSigned-off-by: Suren Baghdasaryan <surenb@google.com>
Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Cc: Benno Lossin <benno.lossin@proton.me>
Cc: "Björn Roy Baron" <bjorn3_gh@protonmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/fortify-string.h

@@ -725,9 +725,9 @@ __FORTIFY_INLINE void *memchr_inv(const void * const POS0 p, int c, size_t size)
 	return __real_memchr_inv(p, c, size);
 }
 
-extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup)
+extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup_noprof)
 								    __realloc_size(2);
-__FORTIFY_INLINE void *kmemdup(const void * const POS0 p, size_t size, gfp_t gfp)
+__FORTIFY_INLINE void *kmemdup_noprof(const void * const POS0 p, size_t size, gfp_t gfp)
 {
 	const size_t p_size = __struct_size(p);
 
@@ -737,6 +737,7 @@ __FORTIFY_INLINE void *kmemdup(const void * const POS0 p, size_t size, gfp_t gfp
 		fortify_panic(FORTIFY_FUNC_kmemdup, FORTIFY_READ, p_size, size, NULL);
 	return __real_kmemdup(p, size, gfp);
 }
+#define kmemdup(...)	alloc_hooks(kmemdup_noprof(__VA_ARGS__))
 
 /**
  * strcpy - Copy a string into another string buffer

include/linux/string.h

@@ -282,7 +282,9 @@ extern void kfree_const(const void *x);
 extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
 extern const char *kstrdup_const(const char *s, gfp_t gfp);
 extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
-extern void *kmemdup(const void *src, size_t len, gfp_t gfp) __realloc_size(2);
+extern void *kmemdup_noprof(const void *src, size_t len, gfp_t gfp) __realloc_size(2);
+#define kmemdup(...)	alloc_hooks(kmemdup_noprof(__VA_ARGS__))
+
 extern void *kvmemdup(const void *src, size_t len, gfp_t gfp) __realloc_size(2);
 extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);
 extern void *kmemdup_array(const void *src, size_t element_size, size_t count, gfp_t gfp);

mm/slab_common.c

@@ -1189,7 +1189,7 @@ __do_krealloc(const void *p, size_t new_size, gfp_t flags)
 		return (void *)p;
 	}
 
-	ret = kmalloc_track_caller(new_size, flags);
+	ret = kmalloc_node_track_caller_noprof(new_size, flags, NUMA_NO_NODE, _RET_IP_);
 	if (ret && p) {
 		/* Disable KASAN checks as the object's redzone is accessed. */
 		kasan_disable_current();
@@ -1213,7 +1213,7 @@ __do_krealloc(const void *p, size_t new_size, gfp_t flags)
  *
  * Return: pointer to the allocated memory or %NULL in case of error
  */
-void *krealloc(const void *p, size_t new_size, gfp_t flags)
+void *krealloc_noprof(const void *p, size_t new_size, gfp_t flags)
 {
 	void *ret;
 
@@ -1228,7 +1228,7 @@ void *krealloc(const void *p, size_t new_size, gfp_t flags)
 
 	return ret;
 }
-EXPORT_SYMBOL(krealloc);
+EXPORT_SYMBOL(krealloc_noprof);
 
 /**
  * kfree_sensitive - Clear sensitive information in memory before freeing

mm/slub.c

@@ -4002,7 +4002,7 @@ static __fastpath_inline void *slab_alloc_node(struct kmem_cache *s, struct list
 	return object;
 }
 
-void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
+void *kmem_cache_alloc_noprof(struct kmem_cache *s, gfp_t gfpflags)
 {
 	void *ret = slab_alloc_node(s, NULL, gfpflags, NUMA_NO_NODE, _RET_IP_,
 				    s->object_size);
@@ -4011,9 +4011,9 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
 
 	return ret;
 }
-EXPORT_SYMBOL(kmem_cache_alloc);
+EXPORT_SYMBOL(kmem_cache_alloc_noprof);
 
-void *kmem_cache_alloc_lru(struct kmem_cache *s, struct list_lru *lru,
+void *kmem_cache_alloc_lru_noprof(struct kmem_cache *s, struct list_lru *lru,
 			   gfp_t gfpflags)
 {
 	void *ret = slab_alloc_node(s, lru, gfpflags, NUMA_NO_NODE, _RET_IP_,
@@ -4023,7 +4023,7 @@ void *kmem_cache_alloc_lru(struct kmem_cache *s, struct list_lru *lru,
 
 	return ret;
 }
-EXPORT_SYMBOL(kmem_cache_alloc_lru);
+EXPORT_SYMBOL(kmem_cache_alloc_lru_noprof);
 
 /**
  * kmem_cache_alloc_node - Allocate an object on the specified node
@@ -4038,7 +4038,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_lru);
  *
  * Return: pointer to the new object or %NULL in case of error
  */
-void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
+void *kmem_cache_alloc_node_noprof(struct kmem_cache *s, gfp_t gfpflags, int node)
 {
 	void *ret = slab_alloc_node(s, NULL, gfpflags, node, _RET_IP_, s->object_size);
 
@@ -4046,7 +4046,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
 
 	return ret;
 }
-EXPORT_SYMBOL(kmem_cache_alloc_node);
+EXPORT_SYMBOL(kmem_cache_alloc_node_noprof);
 
 /*
  * To avoid unnecessary overhead, we pass through large allocation requests
@@ -4063,7 +4063,7 @@ static void *__kmalloc_large_node(size_t size, gfp_t flags, int node)
 		flags = kmalloc_fix_flags(flags);
 
 	flags |= __GFP_COMP;
-	folio = (struct folio *)alloc_pages_node(node, flags, order);
+	folio = (struct folio *)alloc_pages_node_noprof(node, flags, order);
 	if (folio) {
 		ptr = folio_address(folio);
 		lruvec_stat_mod_folio(folio, NR_SLAB_UNRECLAIMABLE_B,
@@ -4078,7 +4078,7 @@ static void *__kmalloc_large_node(size_t size, gfp_t flags, int node)
 	return ptr;
 }
 
-void *kmalloc_large(size_t size, gfp_t flags)
+void *kmalloc_large_noprof(size_t size, gfp_t flags)
 {
 	void *ret = __kmalloc_large_node(size, flags, NUMA_NO_NODE);
 
@@ -4086,9 +4086,9 @@ void *kmalloc_large(size_t size, gfp_t flags)
 		      flags, NUMA_NO_NODE);
 	return ret;
 }
-EXPORT_SYMBOL(kmalloc_large);
+EXPORT_SYMBOL(kmalloc_large_noprof);
 
-void *kmalloc_large_node(size_t size, gfp_t flags, int node)
+void *kmalloc_large_node_noprof(size_t size, gfp_t flags, int node)
 {
 	void *ret = __kmalloc_large_node(size, flags, node);
 
@@ -4096,7 +4096,7 @@ void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 		      flags, node);
 	return ret;
 }
-EXPORT_SYMBOL(kmalloc_large_node);
+EXPORT_SYMBOL(kmalloc_large_node_noprof);
 
 static __always_inline
 void *__do_kmalloc_node(size_t size, gfp_t flags, int node,
@@ -4123,26 +4123,26 @@ void *__do_kmalloc_node(size_t size, gfp_t flags, int node,
 	return ret;
 }
 
-void *__kmalloc_node(size_t size, gfp_t flags, int node)
+void *__kmalloc_node_noprof(size_t size, gfp_t flags, int node)
 {
 	return __do_kmalloc_node(size, flags, node, _RET_IP_);
 }
-EXPORT_SYMBOL(__kmalloc_node);
+EXPORT_SYMBOL(__kmalloc_node_noprof);
 
-void *__kmalloc(size_t size, gfp_t flags)
+void *__kmalloc_noprof(size_t size, gfp_t flags)
 {
 	return __do_kmalloc_node(size, flags, NUMA_NO_NODE, _RET_IP_);
 }
-EXPORT_SYMBOL(__kmalloc);
+EXPORT_SYMBOL(__kmalloc_noprof);
 
-void *__kmalloc_node_track_caller(size_t size, gfp_t flags,
-				  int node, unsigned long caller)
+void *kmalloc_node_track_caller_noprof(size_t size, gfp_t flags,
+				       int node, unsigned long caller)
 {
 	return __do_kmalloc_node(size, flags, node, caller);
 }
-EXPORT_SYMBOL(__kmalloc_node_track_caller);
+EXPORT_SYMBOL(kmalloc_node_track_caller_noprof);
 
-void *kmalloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
+void *kmalloc_trace_noprof(struct kmem_cache *s, gfp_t gfpflags, size_t size)
 {
 	void *ret = slab_alloc_node(s, NULL, gfpflags, NUMA_NO_NODE,
 					    _RET_IP_, size);
@@ -4152,9 +4152,9 @@ void *kmalloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
 	ret = kasan_kmalloc(s, ret, size, gfpflags);
 	return ret;
 }
-EXPORT_SYMBOL(kmalloc_trace);
+EXPORT_SYMBOL(kmalloc_trace_noprof);
 
-void *kmalloc_node_trace(struct kmem_cache *s, gfp_t gfpflags,
+void *kmalloc_node_trace_noprof(struct kmem_cache *s, gfp_t gfpflags,
 			 int node, size_t size)
 {
 	void *ret = slab_alloc_node(s, NULL, gfpflags, node, _RET_IP_, size);
@@ -4164,7 +4164,7 @@ void *kmalloc_node_trace(struct kmem_cache *s, gfp_t gfpflags,
 	ret = kasan_kmalloc(s, ret, size, gfpflags);
 	return ret;
 }
-EXPORT_SYMBOL(kmalloc_node_trace);
+EXPORT_SYMBOL(kmalloc_node_trace_noprof);
 
 static noinline void free_to_partial_list(
 	struct kmem_cache *s, struct slab *slab,
@@ -4769,8 +4769,8 @@ static int __kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags,
 #endif /* CONFIG_SLUB_TINY */
 
 /* Note that interrupts must be enabled when calling this function. */
-int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
-			  void **p)
+int kmem_cache_alloc_bulk_noprof(struct kmem_cache *s, gfp_t flags, size_t size,
+				 void **p)
 {
 	int i;
 	struct obj_cgroup *objcg = NULL;
@@ -4798,7 +4798,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
 
 	return i;
 }
-EXPORT_SYMBOL(kmem_cache_alloc_bulk);
+EXPORT_SYMBOL(kmem_cache_alloc_bulk_noprof);
 
 
 /*

mm/util.c

@@ -124,16 +124,16 @@ EXPORT_SYMBOL(kstrndup);
  * Return: newly allocated copy of @src or %NULL in case of error,
  * result is physically contiguous. Use kfree() to free.
  */
-void *kmemdup(const void *src, size_t len, gfp_t gfp)
+void *kmemdup_noprof(const void *src, size_t len, gfp_t gfp)
 {
 	void *p;
 
-	p = kmalloc_track_caller(len, gfp);
+	p = kmalloc_node_track_caller_noprof(len, gfp, NUMA_NO_NODE, _RET_IP_);
 	if (p)
 		memcpy(p, src, len);
 	return p;
 }
-EXPORT_SYMBOL(kmemdup);
+EXPORT_SYMBOL(kmemdup_noprof);
 
 /**
  * kmemdup_array - duplicate a given array.
@@ -609,7 +609,7 @@ EXPORT_SYMBOL(vm_mmap);
  *
  * Return: pointer to the allocated memory of %NULL in case of failure
  */
-void *kvmalloc_node(size_t size, gfp_t flags, int node)
+void *kvmalloc_node_noprof(size_t size, gfp_t flags, int node)
 {
 	gfp_t kmalloc_flags = flags;
 	void *ret;
@@ -631,7 +631,7 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
 		kmalloc_flags &= ~__GFP_NOFAIL;
 	}
 
-	ret = kmalloc_node(size, kmalloc_flags, node);
+	ret = kmalloc_node_noprof(size, kmalloc_flags, node);
 
 	/*
 	 * It doesn't really make sense to fallback to vmalloc for sub page
@@ -660,7 +660,7 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
 			flags, PAGE_KERNEL, VM_ALLOW_HUGE_VMAP,
 			node, __builtin_return_address(0));
 }
-EXPORT_SYMBOL(kvmalloc_node);
+EXPORT_SYMBOL(kvmalloc_node_noprof);
 
 /**
  * kvfree() - Free memory.
@@ -699,7 +699,7 @@ void kvfree_sensitive(const void *addr, size_t len)
 }
 EXPORT_SYMBOL(kvfree_sensitive);
 
-void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
+void *kvrealloc_noprof(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
 {
 	void *newp;
 
@@ -712,7 +712,7 @@ void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
 	kvfree(p);
 	return newp;
 }
-EXPORT_SYMBOL(kvrealloc);
+EXPORT_SYMBOL(kvrealloc_noprof);
 
 /**
  * __vmalloc_array - allocate memory for a virtually contiguous array.