The patch titled
Subject: mm/vmalloc: add __alloc_size attributes for better bounds checking
has been added to the -mm tree. Its filename is
mm-vmalloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Kees Cook <keescook@xxxxxxxxxxxx>
Subject: mm/vmalloc: add __alloc_size attributes for better bounds checking
As already done in GrapheneOS, add the __alloc_size attribute for
appropriate vmalloc allocator interfaces, to provide additional hinting
for better bounds checking, assisting CONFIG_FORTIFY_SOURCE and other
compiler optimizations.
Link: https://lkml.kernel.org/r/20210818214021.2476230-8-keescook@xxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Co-developed-by: Daniel Micay <danielmicay@xxxxxxxxx>
Signed-off-by: Daniel Micay <danielmicay@xxxxxxxxx>
Cc: Andy Whitcroft <apw@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Dwaipayan Ray <dwaipayanray1@xxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Cc: Miguel Ojeda <ojeda@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/vmalloc.h | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/include/linux/vmalloc.h~mm-vmalloc-add-__alloc_size-attributes-for-better-bounds-checking
+++ a/include/linux/vmalloc.h
@@ -136,20 +136,31 @@ static inline void vmalloc_init(void)
static inline unsigned long vmalloc_nr_pages(void) { return 0; }
#endif
+__alloc_size(1)
extern void *vmalloc(unsigned long size);
+__alloc_size(1)
extern void *vzalloc(unsigned long size);
+__alloc_size(1)
extern void *vmalloc_user(unsigned long size);
+__alloc_size(1)
extern void *vmalloc_node(unsigned long size, int node);
+__alloc_size(1)
extern void *vzalloc_node(unsigned long size, int node);
+__alloc_size(1)
extern void *vmalloc_32(unsigned long size);
+__alloc_size(1)
extern void *vmalloc_32_user(unsigned long size);
+__alloc_size(1)
extern void *__vmalloc(unsigned long size, gfp_t gfp_mask);
+__alloc_size(1)
extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller);
+__alloc_size(1)
void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
int node, const void *caller);
+__alloc_size(1)
void *vmalloc_no_huge(unsigned long size);
extern void vfree(const void *addr);
_
Patches currently in -mm which might be from keescook@xxxxxxxxxxxx are
compiler-attributes-add-__alloc_size-for-better-bounds-checking.patch
checkpatch-add-__alloc_size-to-known-attribute.patch
slab-clean-up-function-declarations.patch
slab-add-__alloc_size-attributes-for-better-bounds-checking.patch
mm-page_alloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
percpu-add-__alloc_size-attributes-for-better-bounds-checking.patch
mm-vmalloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
