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* [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation
@ 2021-06-03  0:17 Gustavo A. R. Silva
  2021-06-03 22:15 ` Kees Cook
  2021-06-09 21:06 ` Gustavo A. R. Silva
  0 siblings, 2 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2021-06-03  0:17 UTC (permalink / raw)
  To: Stanimir Varbanov, Andy Gross, Bjorn Andersson,
	Mauro Carvalho Chehab, Gustavo A. R. Silva
  Cc: linux-media, linux-arm-msm, linux-kernel, Gustavo A. R. Silva,
	linux-hardening, Kees Cook

Now that a one-element array was replaced with a flexible-array member
in struct hfi_sys_set_property_pkt, use the struct_size() helper to
correctly calculate the packet size.

Fixes: 701e10b3fd9f ("media: venus: hfi_cmds.h: Replace one-element array with flexible-array member")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Changes in v3:
 - Fix size calculation in call to struct_size().
   Link: https://lore.kernel.org/linux-hardening/202106021254.39A1561075@keescook/
   Link: https://lore.kernel.org/linux-hardening/113fd896-464c-6aef-215a-a53ac6103a62@embeddedor.com/

Changes in v2:
 - Include linux/overflow.h for struct_size().

 drivers/media/platform/qcom/venus/hfi_cmds.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c
index 4b9dea7f6940..f51024786991 100644
--- a/drivers/media/platform/qcom/venus/hfi_cmds.c
+++ b/drivers/media/platform/qcom/venus/hfi_cmds.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
  * Copyright (C) 2017 Linaro Ltd.
  */
+#include <linux/overflow.h>
 #include <linux/errno.h>
 #include <linux/hash.h>
 
@@ -27,7 +28,7 @@ void pkt_sys_idle_indicator(struct hfi_sys_set_property_pkt *pkt, u32 enable)
 {
 	struct hfi_enable *hfi = (struct hfi_enable *)&pkt->data[1];
 
-	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
+	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
 	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
 	pkt->num_properties = 1;
 	pkt->data[0] = HFI_PROPERTY_SYS_IDLE_INDICATOR;
@@ -39,7 +40,7 @@ void pkt_sys_debug_config(struct hfi_sys_set_property_pkt *pkt, u32 mode,
 {
 	struct hfi_debug_config *hfi;
 
-	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
+	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
 	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
 	pkt->num_properties = 1;
 	pkt->data[0] = HFI_PROPERTY_SYS_DEBUG_CONFIG;
@@ -50,7 +51,7 @@ void pkt_sys_debug_config(struct hfi_sys_set_property_pkt *pkt, u32 mode,
 
 void pkt_sys_coverage_config(struct hfi_sys_set_property_pkt *pkt, u32 mode)
 {
-	pkt->hdr.size = sizeof(*pkt) + sizeof(u32);
+	pkt->hdr.size = struct_size(pkt, data, 2);
 	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
 	pkt->num_properties = 1;
 	pkt->data[0] = HFI_PROPERTY_SYS_CONFIG_COVERAGE;
@@ -116,7 +117,7 @@ void pkt_sys_power_control(struct hfi_sys_set_property_pkt *pkt, u32 enable)
 {
 	struct hfi_enable *hfi = (struct hfi_enable *)&pkt->data[1];
 
-	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
+	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
 	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
 	pkt->num_properties = 1;
 	pkt->data[0] = HFI_PROPERTY_SYS_CODEC_POWER_PLANE_CTRL;
-- 
2.27.0


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation
  2021-06-03  0:17 [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation Gustavo A. R. Silva
@ 2021-06-03 22:15 ` Kees Cook
  2021-06-09 21:06 ` Gustavo A. R. Silva
  1 sibling, 0 replies; 3+ messages in thread
From: Kees Cook @ 2021-06-03 22:15 UTC (permalink / raw)
  To: Gustavo A. R. Silva
  Cc: Stanimir Varbanov, Andy Gross, Bjorn Andersson,
	Mauro Carvalho Chehab, linux-media, linux-arm-msm, linux-kernel,
	linux-hardening

On Wed, Jun 02, 2021 at 07:17:08PM -0500, Gustavo A. R. Silva wrote:
> Now that a one-element array was replaced with a flexible-array member
> in struct hfi_sys_set_property_pkt, use the struct_size() helper to
> correctly calculate the packet size.
> 
> Fixes: 701e10b3fd9f ("media: venus: hfi_cmds.h: Replace one-element array with flexible-array member")
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Thanks for the update!

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation
  2021-06-03  0:17 [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation Gustavo A. R. Silva
  2021-06-03 22:15 ` Kees Cook
@ 2021-06-09 21:06 ` Gustavo A. R. Silva
  1 sibling, 0 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2021-06-09 21:06 UTC (permalink / raw)
  To: Gustavo A. R. Silva, Stanimir Varbanov, Andy Gross,
	Bjorn Andersson, Mauro Carvalho Chehab
  Cc: linux-media, linux-arm-msm, linux-kernel, linux-hardening, Kees Cook

Hi all,

Friendly ping: who can take this, please?

Thanks
--
Gustavo

On 6/2/21 19:17, Gustavo A. R. Silva wrote:
> Now that a one-element array was replaced with a flexible-array member
> in struct hfi_sys_set_property_pkt, use the struct_size() helper to
> correctly calculate the packet size.
> 
> Fixes: 701e10b3fd9f ("media: venus: hfi_cmds.h: Replace one-element array with flexible-array member")
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> ---
> Changes in v3:
>  - Fix size calculation in call to struct_size().
>    Link: https://lore.kernel.org/linux-hardening/202106021254.39A1561075@keescook/
>    Link: https://lore.kernel.org/linux-hardening/113fd896-464c-6aef-215a-a53ac6103a62@embeddedor.com/
> 
> Changes in v2:
>  - Include linux/overflow.h for struct_size().
> 
>  drivers/media/platform/qcom/venus/hfi_cmds.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c
> index 4b9dea7f6940..f51024786991 100644
> --- a/drivers/media/platform/qcom/venus/hfi_cmds.c
> +++ b/drivers/media/platform/qcom/venus/hfi_cmds.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
>   * Copyright (C) 2017 Linaro Ltd.
>   */
> +#include <linux/overflow.h>
>  #include <linux/errno.h>
>  #include <linux/hash.h>
>  
> @@ -27,7 +28,7 @@ void pkt_sys_idle_indicator(struct hfi_sys_set_property_pkt *pkt, u32 enable)
>  {
>  	struct hfi_enable *hfi = (struct hfi_enable *)&pkt->data[1];
>  
> -	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
> +	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
>  	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
>  	pkt->num_properties = 1;
>  	pkt->data[0] = HFI_PROPERTY_SYS_IDLE_INDICATOR;
> @@ -39,7 +40,7 @@ void pkt_sys_debug_config(struct hfi_sys_set_property_pkt *pkt, u32 mode,
>  {
>  	struct hfi_debug_config *hfi;
>  
> -	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
> +	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
>  	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
>  	pkt->num_properties = 1;
>  	pkt->data[0] = HFI_PROPERTY_SYS_DEBUG_CONFIG;
> @@ -50,7 +51,7 @@ void pkt_sys_debug_config(struct hfi_sys_set_property_pkt *pkt, u32 mode,
>  
>  void pkt_sys_coverage_config(struct hfi_sys_set_property_pkt *pkt, u32 mode)
>  {
> -	pkt->hdr.size = sizeof(*pkt) + sizeof(u32);
> +	pkt->hdr.size = struct_size(pkt, data, 2);
>  	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
>  	pkt->num_properties = 1;
>  	pkt->data[0] = HFI_PROPERTY_SYS_CONFIG_COVERAGE;
> @@ -116,7 +117,7 @@ void pkt_sys_power_control(struct hfi_sys_set_property_pkt *pkt, u32 enable)
>  {
>  	struct hfi_enable *hfi = (struct hfi_enable *)&pkt->data[1];
>  
> -	pkt->hdr.size = sizeof(*pkt) + sizeof(*hfi) + sizeof(u32);
> +	pkt->hdr.size = struct_size(pkt, data, 1) + sizeof(*hfi);
>  	pkt->hdr.pkt_type = HFI_CMD_SYS_SET_PROPERTY;
>  	pkt->num_properties = 1;
>  	pkt->data[0] = HFI_PROPERTY_SYS_CODEC_POWER_PLANE_CTRL;
> 

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-06-09 21:29 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-06-03  0:17 [PATCH v3][venus-for-next-v5.14] media: venus: hfi_cmds: Fix packet size calculation Gustavo A. R. Silva
2021-06-03 22:15 ` Kees Cook
2021-06-09 21:06 ` Gustavo A. R. Silva

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