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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id c13-20020a170902d48d00b001bee782a1desm17055007plg.181.2023.09.29.11.07.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Sep 2023 11:07:47 -0700 (PDT) From: Kees Cook To: Ido Schimmel Cc: Kees Cook , Petr Machata , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , 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 4/5] mlxsw: spectrum_router: Annotate struct mlxsw_sp_nexthop_group_info with __counted_by Date: Fri, 29 Sep 2023 11:07:43 -0700 Message-Id: <20230929180746.3005922-4-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230929180611.work.870-kees@kernel.org> References: <20230929180611.work.870-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1562; i=keescook@chromium.org; h=from:subject; bh=B8keI90TRW2q45uUonlCrEQKui4OLUvrgLBebVNQ9NA=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlFxJv3gQ2icCiNvzN2SrB6CO5vY/Quxy8Fmvkp MWA5zi05RKJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRcSbwAKCRCJcvTf3G3A JlMgD/9KspItI7uRPQsQk5b1n6wj1VGlU6uDB/MzB8j7BFvYACH75tHJ6+EtAxCMs6WH2/1xOJB Zc//rKE5ME8cSKtfDy2yuCaWHFyuMkgN1a33v24+KmVjWOC8Z/QjFt5svRWte8710RTditYZOT7 XKykSAvsTe4/HJALIvV4CYJjTF4uavOTyu5UlYB7ZHjBBe0+VR+xepIZPkEjOgCYBRLh7lX/MeG fr3kiTfV1+0L6p5GA+Jbl2WymK1k56AOkQZXyBngR74bpIruI0iJJdu0vJKwC30V3SHQujqCe2k z598oohT+Wnd0x8ojB3RKTl1Kd1jHRSPN3uXlaIEIr33yM8vKL4PaoYIRnE6ZAh4LB8XeMkhrF2 AQjtjTNgvq05sJ/iwgNhIjSE0TzGlV8uwf6IBWDELikCMijBFN2BhQg5lXOlI9ZzjV39Pv6Ghbg IEa8dbjv8XLSyhtIAWT9wZq+uOFfvYMeRwC/ff+Qeqx7S0B97oA19xAfKE2Ug/0eKSAwybHM0Ao eEzDT1/Q9mpQFcEl0vrNwq17gJM2cUasPKjBnI1W7aqj+rez0GpJxzyho+3j2K9MSMxbW2cqrw1 nPBe7q3r8weENye2KqEWW5tjD5rkm2B1ikBvcdhkjlR/5K3OlyydwoM7dgEWGY1p0uLg0xY5rcC kErWnebJxPj8H3A== 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 checking 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 mlxsw_sp_nexthop_g= roup_info. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Ido Schimmel Cc: Petr Machata Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Ido Schimmel Reviewed-by: Justin Stitt --- drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/driver= s/net/ethernet/mellanox/mlxsw/spectrum_router.c index debd2c466f11..82a95125d9ca 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -3107,7 +3107,7 @@ struct mlxsw_sp_nexthop_group_info { gateway:1, /* routes using the group use a gateway */ is_resilient:1; struct list_head list; /* member in nh_res_grp_list */ - struct mlxsw_sp_nexthop nexthops[]; + struct mlxsw_sp_nexthop nexthops[] __counted_by(count); }; =20 static struct mlxsw_sp_rif * --=20 2.34.1