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From: Kees Cook <keescook@chromium.org>
To: Kalle Valo <kvalo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
	Jeff Johnson <quic_jjohnson@quicinc.com>,
	ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Tom Rix <trix@redhat.com>,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
	linux-hardening@vger.kernel.org
Subject: [PATCH] wifi: ath10k: Annotate struct ath10k_ce_ring with __counted_by
Date: Fri, 15 Sep 2023 13:06:36 -0700	[thread overview]
Message-ID: <20230915200636.never.762-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 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 ath10k_ce_ring.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Kalle Valo <kvalo@kernel.org>
Cc: Jeff Johnson <quic_jjohnson@quicinc.com>
Cc: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 drivers/net/wireless/ath/ath10k/ce.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
index 666ce384a1d8..27367bd64e95 100644
--- a/drivers/net/wireless/ath/ath10k/ce.h
+++ b/drivers/net/wireless/ath/ath10k/ce.h
@@ -110,7 +110,7 @@ struct ath10k_ce_ring {
 	struct ce_desc_64 *shadow_base;
 
 	/* keep last */
-	void *per_transfer_context[];
+	void *per_transfer_context[] __counted_by(nentries);
 };
 
 struct ath10k_ce_pipe {
-- 
2.34.1


_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

WARNING: multiple messages have this Message-ID (diff)
From: Kees Cook <keescook@chromium.org>
To: Kalle Valo <kvalo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
	Jeff Johnson <quic_jjohnson@quicinc.com>,
	ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Tom Rix <trix@redhat.com>,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
	linux-hardening@vger.kernel.org
Subject: [PATCH] wifi: ath10k: Annotate struct ath10k_ce_ring with __counted_by
Date: Fri, 15 Sep 2023 13:06:36 -0700	[thread overview]
Message-ID: <20230915200636.never.762-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 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 ath10k_ce_ring.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Kalle Valo <kvalo@kernel.org>
Cc: Jeff Johnson <quic_jjohnson@quicinc.com>
Cc: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 drivers/net/wireless/ath/ath10k/ce.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
index 666ce384a1d8..27367bd64e95 100644
--- a/drivers/net/wireless/ath/ath10k/ce.h
+++ b/drivers/net/wireless/ath/ath10k/ce.h
@@ -110,7 +110,7 @@ struct ath10k_ce_ring {
 	struct ce_desc_64 *shadow_base;
 
 	/* keep last */
-	void *per_transfer_context[];
+	void *per_transfer_context[] __counted_by(nentries);
 };
 
 struct ath10k_ce_pipe {
-- 
2.34.1


             reply	other threads:[~2023-09-15 20:07 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-15 20:06 Kees Cook [this message]
2023-09-15 20:06 ` [PATCH] wifi: ath10k: Annotate struct ath10k_ce_ring with __counted_by Kees Cook
2023-09-15 20:38 ` Jeff Johnson
2023-09-15 20:38   ` Jeff Johnson
2023-09-15 21:19 ` Gustavo A. R. Silva
2023-09-15 21:19   ` Gustavo A. R. Silva
2023-09-21  8:10 ` Kalle Valo
2023-09-21  8:10   ` Kalle Valo

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