linux-hardening - [PATCH v2 6/9] slub: Introduce kmem_buckets_alloc_track

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Date: Tue,  5 Mar 2024 02:10:22 -0800
From: Kees Cook <keescook@...omium.org>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Kees Cook <keescook@...omium.org>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Hyeonggon Yoo <42.hyeyoo@...il.com>,
	linux-mm@...ck.org,
	"GONG, Ruiqi" <gongruiqi@...weicloud.com>,
	Xiu Jianfeng <xiujianfeng@...wei.com>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Jann Horn <jannh@...gle.com>,
	Matteo Rizzo <matteorizzo@...gle.com>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: [PATCH v2 6/9] slub: Introduce kmem_buckets_alloc_track_caller()

For better capturing the caller details for allocation wrappers,
introduce kmem_buckets_alloc_track_caller() by plumbing the
buckets into the existing *_track_caller() interfaces.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Hyeonggon Yoo <42.hyeyoo@...il.com>
Cc: linux-mm@...ck.org
---
 include/linux/slab.h | 11 +++++++----
 mm/slub.c            |  4 ++--
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 08d248f9a1ba..7d84f875dcf4 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -606,6 +606,9 @@ void *kmem_buckets_alloc(kmem_buckets *b, size_t size, gfp_t flags)
 	return __kmalloc_node(b, size, flags, NUMA_NO_NODE);
 }
 
+#define kmem_buckets_alloc_track_caller(b, size, flags)	\
+	__kmalloc_node_track_caller(b, size, flags, NUMA_NO_NODE, _RET_IP_)
+
 static __always_inline __alloc_size(1) void *kmalloc_node(size_t size, gfp_t flags, int node)
 {
 	if (__builtin_constant_p(size) && size) {
@@ -670,10 +673,10 @@ static inline __alloc_size(1, 2) void *kcalloc(size_t n, size_t size, gfp_t flag
 	return kmalloc_array(n, size, flags | __GFP_ZERO);
 }
 
-void *__kmalloc_node_track_caller(size_t size, gfp_t flags, int node,
-				  unsigned long caller) __alloc_size(1);
+void *__kmalloc_node_track_caller(kmem_buckets *b, size_t size, gfp_t flags, int node,
+				  unsigned long caller) __alloc_size(2);
 #define kmalloc_node_track_caller(size, flags, node) \
-	__kmalloc_node_track_caller(size, flags, node, \
+	__kmalloc_node_track_caller(NULL, size, flags, node, \
 				    _RET_IP_)
 
 /*
@@ -685,7 +688,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t flags, int node,
  * request comes from.
  */
 #define kmalloc_track_caller(size, flags) \
-	__kmalloc_node_track_caller(size, flags, \
+	__kmalloc_node_track_caller(NULL, size, flags, \
 				    NUMA_NO_NODE, _RET_IP_)
 
 static inline __alloc_size(1, 2) void *kmalloc_array_node(size_t n, size_t size, gfp_t flags,
diff --git a/mm/slub.c b/mm/slub.c
index 71220b4b1f79..ae54ec452a11 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3995,10 +3995,10 @@ void *__kmalloc(size_t size, gfp_t flags)
 }
 EXPORT_SYMBOL(__kmalloc);
 
-void *__kmalloc_node_track_caller(size_t size, gfp_t flags,
+void *__kmalloc_node_track_caller(kmem_buckets *b, size_t size, gfp_t flags,
 				  int node, unsigned long caller)
 {
-	return __do_kmalloc_node(NULL, size, flags, node, caller);
+	return __do_kmalloc_node(b, size, flags, node, caller);
 }
 EXPORT_SYMBOL(__kmalloc_node_track_caller);
 
-- 
2.34.1