From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Daniel Micay <danielmicay@gmail.com>,
Dennis Zhou <dennis@kernel.org>, Tejun Heo <tj@kernel.org>,
Christoph Lameter <cl@linux.com>,
linux-mm@kvack.org, Joe Perches <joe@perches.com>,
Miguel Ojeda <ojeda@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Andy Whitcroft <apw@canonical.com>,
Dwaipayan Ray <dwaipayanray1@gmail.com>,
Lukas Bulwahn <lukas.bulwahn@gmail.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
clang-built-linux@googlegroups.com, linux-kbuild@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: [PATCH v2 6/7] percpu: Add __alloc_size attributes for better bounds checking
Date: Wed, 18 Aug 2021 14:40:20 -0700 [thread overview]
Message-ID: <20210818214021.2476230-7-keescook@chromium.org> (raw)
In-Reply-To: <20210818214021.2476230-1-keescook@chromium.org>
As already done in GrapheneOS, add the __alloc_size attribute for
appropriate percpu allocator interfaces, to provide additional hinting
for better bounds checking, assisting CONFIG_FORTIFY_SOURCE and other
compiler optimizations.
Co-developed-by: Daniel Micay <danielmicay@gmail.com>
Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: linux-mm@kvack.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
include/linux/percpu.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 5e76af742c80..119f41815b32 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -123,6 +123,7 @@ extern int __init pcpu_page_first_chunk(size_t reserved_size,
pcpu_fc_populate_pte_fn_t populate_pte_fn);
#endif
+__alloc_size(1)
extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
extern bool __is_kernel_percpu_address(unsigned long addr, unsigned long *can_addr);
extern bool is_kernel_percpu_address(unsigned long addr);
@@ -131,7 +132,9 @@ extern bool is_kernel_percpu_address(unsigned long addr);
extern void __init setup_per_cpu_areas(void);
#endif
+__alloc_size(1)
extern void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp);
+__alloc_size(1)
extern void __percpu *__alloc_percpu(size_t size, size_t align);
extern void free_percpu(void __percpu *__pdata);
extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
--
2.30.2
next prev parent reply other threads:[~2021-08-18 21:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 21:40 [PATCH v2 0/7] Add __alloc_size() for better bounds checking Kees Cook
2021-08-18 21:40 ` [PATCH v2 1/7] Compiler Attributes: " Kees Cook
2021-08-18 21:51 ` Nathan Chancellor
2021-08-18 23:19 ` Andrew Morton
2021-08-19 7:06 ` Kees Cook
2021-08-19 0:04 ` Miguel Ojeda
2021-08-18 21:40 ` [PATCH v2 2/7] checkpatch: Add __alloc_size() to known $Attribute Kees Cook
2021-08-18 21:40 ` [PATCH v2 3/7] slab: Clean up function declarations Kees Cook
2021-08-18 21:40 ` [PATCH v2 4/7] slab: Add __alloc_size attributes for better bounds checking Kees Cook
2021-08-19 8:27 ` Rasmus Villemoes
2021-08-25 21:31 ` Nick Desaulniers
2021-09-22 22:41 ` Kees Cook
2021-08-18 21:40 ` [PATCH v2 5/7] mm/page_alloc: " Kees Cook
2021-08-18 21:40 ` Kees Cook [this message]
2021-08-19 0:42 ` [PATCH v2 6/7] percpu: " Dennis Zhou
2021-08-19 3:36 ` Kees Cook
2021-08-19 14:12 ` Dennis Zhou
2021-08-20 5:11 ` Andrew Morton
2021-08-20 5:27 ` Kees Cook
2021-08-18 21:40 ` [PATCH v2 7/7] mm/vmalloc: " Kees Cook
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