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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id s2-20020a639242000000b0057825bd3448sm14577546pgn.51.2023.09.29.11.04.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Sep 2023 11:04:32 -0700 (PDT) From: Kees Cook To: Jason Gunthorpe Cc: Kees Cook , Leon Romanovsky , =?utf-8?q?H=C3=A5kon_Bugge?= , Avihai Horon , Anand Khoje , Mark Bloch , linux-rdma@vger.kernel.org, Dennis Dalessandro , Christian Benvenuti , Nelson Escobar , Bernard Metzler , Bart Van Assche , "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Tom Rix , Patrisious Haddad , Chuck Lever , Tom Talpey , wangjianli , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH 2/7] RDMA/core: Annotate struct ib_pkey_cache with __counted_by Date: Fri, 29 Sep 2023 11:04:25 -0700 Message-Id: <20230929180431.3005464-2-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230929180305.work.590-kees@kernel.org> References: <20230929180305.work.590-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1301; i=keescook@chromium.org; h=from:subject; bh=8qTIqTpqch+dyj739sghT5yZ5j+JjtWjxI1TdxYuFP8=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlFxGtnlN5Fv7CxLg4EAHhoDTEkyA2uohAKbEuJ GpqdYgLKF6JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRcRrQAKCRCJcvTf3G3A JsP9EAC0DgrjiUKiy5qvIIyWJvdycEGXOMygwychR18Ef+pgg5+zSsDS92qrEYrYtFz76UNEjXu 17JwoDffv1yCBXGPdCC533oDBSgVr+TlqtP2MZGJpAFB2jDA29+Dh4hzGUwpMr/6MnWn0bTR+Vf CpNLYII3OIAvmJ7tmaGaoHilX1gORNFvw6QXwwBjPqGo4OVFa8kBf1B0rtFRYcv3mAjY6/NICJX SHYsUU4Ics30sqUiukI13sfP3+hBHWUsXPfxlfPua60GazyoI3Knfr67AHenGUpiY+IW4aLoKdS o2kCcBAN7fkiUfZ1gZ78iamlNXXX0OSwijoe8XxuBtjfZazk6bZ+fvQocUBNAtcWA1GpKYkmzuD WZM7ZiZAb+AikXlQapk0bMLGL+lDIHr8vZDe4wCguY0+c2vj7sF53jCbCxvyHROPFaIf6NOF8Sl WgTV/v+kMTa9AYlUC/XwuF6+IkQA9oAN3SwwYjVJ8fIpCpFEr2BsgBBh3Ga0GVx1N+voyDpWY3G F+h9MTIiqcG9+eMOkNDRxa/356g84qJQVkHabmIondLkPx4Fhxi4sl0Q/z0lMrXCKQWUEiD0CZ+ EyY/I2qS70/lsYtItOwfyhWLxUvHwRLNmkGx3T7/t7+KYvzbr3n9McTs1R8tzNlYTWrKwQ52ImD 13o2YAgRaZPedeg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org 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 ib_pkey_cache. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: "Håkon Bugge" Cc: Avihai Horon Cc: Anand Khoje Cc: Mark Bloch Cc: linux-rdma@vger.kernel.org Signed-off-by: Kees Cook --- drivers/infiniband/core/cache.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index 7acc0f936dad..c02a96d3572a 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -46,7 +46,7 @@ struct ib_pkey_cache { int table_len; - u16 table[]; + u16 table[] __counted_by(table_len); }; struct ib_update_work {