linux-hardening - [PATCH 2/2] media: venus: hfi_cmds: struct hfi_session_release_buffer_pkt: Add __counted

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Message-Id: <20240710230914.3156277-2-kees@kernel.org>
Date: Wed, 10 Jul 2024 16:09:13 -0700
From: Kees Cook <kees@...nel.org>
To: Stanimir Varbanov <stanimir.k.varbanov@...il.com>
Cc: Kees Cook <kees@...nel.org>,
	Vikash Garodia <quic_vgarodia@...cinc.com>,
	"Bryan O'Donoghue" <bryan.odonoghue@...aro.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	linux-media@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] media: venus: hfi_cmds: struct hfi_session_release_buffer_pkt: Add __counted_by annotation

The only direct user of struct hfi_session_release_buffer_pkt is
pkt_session_unset_buffers() which sets "num_buffers" before using it
as a loop counter for accessing "buffer_info". Add the __counted_by
annotation to reflect the relationship.

Signed-off-by: Kees Cook <kees@...nel.org>
---
Cc: Stanimir Varbanov <stanimir.k.varbanov@...il.com>
Cc: Vikash Garodia <quic_vgarodia@...cinc.com>
Cc: "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-media@...r.kernel.org
Cc: linux-arm-msm@...r.kernel.org
Cc: linux-hardening@...r.kernel.org
---
 drivers/media/platform/qcom/venus/hfi_cmds.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h
index 42825f07939d..1adf2d2ae5f2 100644
--- a/drivers/media/platform/qcom/venus/hfi_cmds.h
+++ b/drivers/media/platform/qcom/venus/hfi_cmds.h
@@ -227,7 +227,7 @@ struct hfi_session_release_buffer_pkt {
 	u32 extradata_size;
 	u32 response_req;
 	u32 num_buffers;
-	u32 buffer_info[];
+	u32 buffer_info[] __counted_by(num_buffers);
 };
 
 struct hfi_session_release_resources_pkt {
-- 
2.34.1