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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id q4sm4066225pfl.50.2021.09.30.15.27.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Sep 2021 15:27:09 -0700 (PDT) From: Kees Cook To: Andrew Morton Cc: Kees Cook , Andy Whitcroft , Christoph Lameter , David Rientjes , Dennis Zhou , Dwaipayan Ray , Joe Perches , Joonsoo Kim , Lukas Bulwahn , Miguel Ojeda , Nathan Chancellor , Nick Desaulniers , Pekka Enberg , Tejun Heo , Vlastimil Babka , Daniel Micay , Masahiro Yamada , Michal Marek , clang-built-linux@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH v3 6/8] mm/vmalloc: Add __alloc_size attributes for better bounds checking Date: Thu, 30 Sep 2021 15:27:02 -0700 Message-Id: <20210930222704.2631604-7-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210930222704.2631604-1-keescook@chromium.org> References: <20210930222704.2631604-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2969; h=from:subject; bh=PqMG9LUKCcMh794yj62SW/bUvosL4x5yAHHZWjpUkyg=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhVjm34phzSlXdvuTp3+opvclRgdeGSmO+NwyepuYM EN6zSnyJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYVY5twAKCRCJcvTf3G3AJhT0EA CJkQ005XqUiJSOcNF6agctDoJhc+CVk4wZ2PG6HQUVmHJKwFf67w4PZ9g3p1fsjzXDp9eaYZefJFUi 6JHZRF5jjU0UYYfYT+DIAnlZM5F59JkpxVExn9yFX1HQyiWAe5/l+5ivLQmIspyvdgPt0GkAfHmeO/ SAzlS5DsbIsmGTLy3DBecFEarOb1YWkPC2Bv7+6PBHt17TVvlpe3KrKvykV7blZWLbAXP3gFo73aO7 YKXx06jgVvyoFXBmYg1fbqfB/TuIRdafZpd4e4IXdqUM/sz3BfrZ5Sszh4wefHDCoDpNdwCNaq+coA W1Hf6kjXkHCK0W6df8mlNFWzVvlCrt5xS488eSFMmPYbk3ImPlxfMNlYoW21FSY3z2SGV6UMa9UTce PW5Ozc21RqIbDwIc1m/H97hfNvFCH0evpi6086NOBh3kyFU3RbIngjeRpk+C+awlD56ONUjPYf4dwv 8DssvV22U43dK6J18SZPEd1qOnylxxE5blxqg4EpCCncxUm7sQEmCYqMwp4O4BK73wNhCzMt0+Qi2u AWPmBNoHgN9dPBao7l6NRLBvFtVtgn5ojCl6tSMu0ueoGwYkLf2APnPgslcTmsO0a6TiP0U8MDgrpk OD0LxB+07EMcZPI2t5HQuWLuU9N2QxGPHO2KQqts1PVM1qqJ2ZwHw3aPkKWw== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Cc: Andy Whitcroft Cc: Christoph Lameter Cc: David Rientjes Cc: Dennis Zhou Cc: Dwaipayan Ray Cc: Joe Perches Cc: Joonsoo Kim Cc: Lukas Bulwahn Cc: Miguel Ojeda Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Pekka Enberg Cc: Tejun Heo Cc: Vlastimil Babka Co-developed-by: Daniel Micay Signed-off-by: Daniel Micay Signed-off-by: Kees Cook --- include/linux/vmalloc.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 671d402c3778..0ed56fc10c11 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -136,21 +136,21 @@ static inline void vmalloc_init(void) static inline unsigned long vmalloc_nr_pages(void) { return 0; } #endif -extern void *vmalloc(unsigned long size); -extern void *vzalloc(unsigned long size); -extern void *vmalloc_user(unsigned long size); -extern void *vmalloc_node(unsigned long size, int node); -extern void *vzalloc_node(unsigned long size, int node); -extern void *vmalloc_32(unsigned long size); -extern void *vmalloc_32_user(unsigned long size); -extern void *__vmalloc(unsigned long size, gfp_t gfp_mask); +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); + const void *caller) __alloc_size(1); void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask, - int node, const void *caller); -void *vmalloc_no_huge(unsigned long size); + int node, const void *caller) __alloc_size(1); +void *vmalloc_no_huge(unsigned long size) __alloc_size(1); extern void vfree(const void *addr); extern void vfree_atomic(const void *addr); -- 2.30.2