From: Kees Cook <keescook@chromium.org>
To: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: Kees Cook <keescook@chromium.org>,
Shiraz Saleem <shiraz.saleem@intel.com>,
Jakub Kicinski <kuba@kernel.org>,
Jesse Brandeburg <jesse.brandeburg@intel.com>,
Gurucharan G <gurucharanx.g@intel.com>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
llvm@lists.linux.dev
Subject: [PATCH] i40e: Annotate struct i40e_qvlist_info with __counted_by
Date: Tue, 3 Oct 2023 16:18:38 -0700 [thread overview]
Message-ID: <20231003231838.work.510-kees@kernel.org> (raw)
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@intel.com>
Cc: Shiraz Saleem <shiraz.saleem@intel.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Gurucharan G <gurucharanx.g@intel.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <keescook@chromium.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
next reply other threads:[~2023-10-03 23:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-03 23:18 Kees Cook [this message]
2023-10-03 23:39 ` [PATCH] i40e: Annotate struct i40e_qvlist_info with __counted_by Gustavo A. R. Silva
2023-11-30 21:59 ` Kees Cook
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