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Message-Id: <20231003231838.work.510-kees@kernel.org> Date: Tue, 3 Oct 2023 16:18:38 -0700 From: Kees Cook <keescook@...omium.org> To: Tony Nguyen <anthony.l.nguyen@...el.com> Cc: Kees Cook <keescook@...omium.org>, Shiraz Saleem <shiraz.saleem@...el.com>, Jakub Kicinski <kuba@...nel.org>, Jesse Brandeburg <jesse.brandeburg@...el.com>, Gurucharan G <gurucharanx.g@...el.com>, "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] i40e: Annotate struct i40e_qvlist_info 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 i40e_qvlist_info. Cc: Tony Nguyen <anthony.l.nguyen@...el.com> Cc: Shiraz Saleem <shiraz.saleem@...el.com> Cc: Jakub Kicinski <kuba@...nel.org> Cc: Jesse Brandeburg <jesse.brandeburg@...el.com> Cc: Gurucharan G <gurucharanx.g@...el.com> Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org> Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@...omium.org> --- include/linux/net/intel/i40e_client.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/net/intel/i40e_client.h b/include/linux/net/intel/i40e_client.h index ed42bd5f639f..0aa4411528fc 100644 --- a/include/linux/net/intel/i40e_client.h +++ b/include/linux/net/intel/i40e_client.h @@ -45,7 +45,7 @@ struct i40e_qv_info { struct i40e_qvlist_info { u32 num_vectors; - struct i40e_qv_info qv_info[]; + struct i40e_qv_info qv_info[] __counted_by(num_vectors); }; -- 2.34.1
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