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authorKees Cook <keescook@chromium.org>2021-11-05 23:36:31 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-06 23:30:34 +0300
commit56bcf40f91c7d7f53b77abe161a7d18ef9f981ba (patch)
treeeb6faa78701947229f8da4a6933c85ab7b698b9c /include/linux/slab.h
parentc37495d6254c237578db3121dcf79857e033f8ff (diff)
downloadlinux-56bcf40f91c7d7f53b77abe161a7d18ef9f981ba.tar.xz
mm/kvmalloc: add __alloc_size attributes for better bounds checking
As already done in GrapheneOS, add the __alloc_size attribute for regular kvmalloc interfaces, to provide additional hinting for better bounds checking, assisting CONFIG_FORTIFY_SOURCE and other compiler optimizations. Link: https://lkml.kernel.org/r/20210930222704.2631604-6-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Co-developed-by: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Daniel Micay <danielmicay@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andy Whitcroft <apw@canonical.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Dwaipayan Ray <dwaipayanray1@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Alexandre Bounine <alex.bou9@gmail.com> Cc: Gustavo A. R. Silva <gustavoars@kernel.org> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jing Xiangfeng <jingxiangfeng@huawei.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: kernel test robot <lkp@intel.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/slab.h')
-rw-r--r--include/linux/slab.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h
index b5bf0537975b..837cb16232ef 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -737,21 +737,21 @@ static inline __alloc_size(1) void *kzalloc_node(size_t size, gfp_t flags, int n
return kmalloc_node(size, flags | __GFP_ZERO, node);
}
-extern void *kvmalloc_node(size_t size, gfp_t flags, int node);
-static inline void *kvmalloc(size_t size, gfp_t flags)
+extern void *kvmalloc_node(size_t size, gfp_t flags, int node) __alloc_size(1);
+static inline __alloc_size(1) void *kvmalloc(size_t size, gfp_t flags)
{
return kvmalloc_node(size, flags, NUMA_NO_NODE);
}
-static inline void *kvzalloc_node(size_t size, gfp_t flags, int node)
+static inline __alloc_size(1) void *kvzalloc_node(size_t size, gfp_t flags, int node)
{
return kvmalloc_node(size, flags | __GFP_ZERO, node);
}
-static inline void *kvzalloc(size_t size, gfp_t flags)
+static inline __alloc_size(1) void *kvzalloc(size_t size, gfp_t flags)
{
return kvmalloc(size, flags | __GFP_ZERO);
}
-static inline void *kvmalloc_array(size_t n, size_t size, gfp_t flags)
+static inline __alloc_size(1, 2) void *kvmalloc_array(size_t n, size_t size, gfp_t flags)
{
size_t bytes;
@@ -761,13 +761,13 @@ static inline void *kvmalloc_array(size_t n, size_t size, gfp_t flags)
return kvmalloc(bytes, flags);
}
-static inline void *kvcalloc(size_t n, size_t size, gfp_t flags)
+static inline __alloc_size(1, 2) void *kvcalloc(size_t n, size_t size, gfp_t flags)
{
return kvmalloc_array(n, size, flags | __GFP_ZERO);
}
-extern void *kvrealloc(const void *p, size_t oldsize, size_t newsize,
- gfp_t flags);
+extern void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
+ __alloc_size(3);
extern void kvfree(const void *addr);
extern void kvfree_sensitive(const void *addr, size_t len);