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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id fm18-20020a056a002f9200b00684ca1b45b9sm1978519pfb.149.2023.10.03.16.18.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 16:18:08 -0700 (PDT) From: Kees Cook To: Pablo Neira Ayuso Cc: Kees Cook , Jozsef Kadlecsik , Florian Westphal , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] netfilter: nf_tables: Annotate struct nft_pipapo_match with __counted_by Date: Tue, 3 Oct 2023 16:17:51 -0700 Message-Id: <20231003231750.work.190-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1445; i=keescook@chromium.org; h=from:subject:message-id; bh=Wy0TE8qEtssfM7cN9gcV0HXN7z8A45g0+0RjkMYsJ6Q=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlHKEeqBf2tLycKMWuivraE0LzPS9ivsggbdtww QfkATjpb1eJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRyhHgAKCRCJcvTf3G3A JjOHEACMTVDOfHBHAk8PGKTzvz8VfSLnexla3kFw3JTpU4WFBKxGBGl0Rk5JPIl9QNAC7P8Tv1D tc6AdnTmyqE+nwKP/rjvAMfjAYECHpwYOaJAeUK0uSQQ3jiYQ204Rz1XeNmkZtrPMUV84YO3wn+ z9J6E3OILiVubIm1FpaooFMb2RfqcbXIrOvy17H2o3l5TFI5SlTdOudtqU2Xfw9MA6gCOSPUAD6 E7/ZbZKh0SUmBJ8g2XXQ1efypS4fTtGGX6vIjdTFNb3mm/pl8u8pUb7HIHIHmx4ajHVULNXKhJS FR+2+4KIcgUfZUwkEVfkbHYdrPhSezICZCwT98pN7OaP7oSAmWvM1r4OgWIwd9HZH9//lFyFOwY ku9TgykVDQJR1/DogW3OlpuAW3tSz/kdhPLsQzo37jmts3qaiNitpS798OLrieiY/7QCbKO6Hro vfM94GieScRafb2hlRygTpf5wAVkl9oWAlzXRrkQ9Op8ErfEGnPtTwp+0/+UEqXWirSg+4H4C1j /6joRVoyBrCr3Gf0sujbuMbKM2gE42TMVkCJJU6EUnIi3F4F6rLLbcywyi/unnsiDjd1Lw3uUZl tCYdMDgGHXxRMzdhiqbuSLOqg6Zs2i5mheccBCbgvf7k2bPgzQlmsTRrlmWWWwm0+BhcuXWScmO cyWMQGk mmrEgDeA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct nft_pipapo_match. Cc: Pablo Neira Ayuso Cc: Jozsef Kadlecsik Cc: Florian Westphal Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: netfilter-devel@vger.kernel.org Cc: coreteam@netfilter.org Cc: netdev@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/c= ounted_by.cocci [1] Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- net/netfilter/nft_set_pipapo.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nft_set_pipapo.h b/net/netfilter/nft_set_pipapo.h index 25a75591583e..2e164a319945 100644 --- a/net/netfilter/nft_set_pipapo.h +++ b/net/netfilter/nft_set_pipapo.h @@ -147,7 +147,7 @@ struct nft_pipapo_match { unsigned long * __percpu *scratch; size_t bsize_max; struct rcu_head rcu; - struct nft_pipapo_field f[]; + struct nft_pipapo_field f[] __counted_by(field_count); }; =20 /** --=20 2.34.1