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Message-Id: <20231003231730.work.166-kees@kernel.org> Date: Tue, 3 Oct 2023 16:17:30 -0700 From: Kees Cook <keescook@...omium.org> To: Saeed Mahameed <saeedm@...dia.com> Cc: Kees Cook <keescook@...omium.org>, Leon Romanovsky <leon@...nel.org>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, linux-rdma@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, llvm@...ts.linux.dev Subject: [PATCH] net/mlx5: Annotate struct mlx5_flow_handle with __counted_by 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 mlx5_flow_handle. Cc: Saeed Mahameed <saeedm@...dia.com> Cc: Leon Romanovsky <leon@...nel.org> Cc: "David S. Miller" <davem@...emloft.net> Cc: Eric Dumazet <edumazet@...gle.com> Cc: Jakub Kicinski <kuba@...nel.org> Cc: Paolo Abeni <pabeni@...hat.com> Cc: netdev@...r.kernel.org Cc: linux-rdma@...r.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@...omium.org> --- drivers/net/ethernet/mellanox/mlx5/core/fs_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h index 4aed1768b85f..78eb6b7097e1 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h @@ -181,7 +181,7 @@ struct mlx5_flow_rule { struct mlx5_flow_handle { int num_rules; - struct mlx5_flow_rule *rule[]; + struct mlx5_flow_rule *rule[] __counted_by(num_rules); }; /* Type of children is mlx5_flow_group */ -- 2.34.1
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