wlcore: testmode: Constify strutc nla_policy

[PATCH] wlcore: testmode: Constify strutc nla_policy

Posted by Christophe JAILLET 1 week, 5 days ago

'struct nla_policy' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   5062	    528	      0	   5590	   15d6	drivers/net/wireless/ti/wlcore/testmode.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   5178	    404	      0	   5582	   15ce	drivers/net/wireless/ti/wlcore/testmode.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested only
---
 drivers/net/wireless/ti/wlcore/testmode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ti/wlcore/testmode.c b/drivers/net/wireless/ti/wlcore/testmode.c
index 3f338b8096c7..fc8ea58bc165 100644
--- a/drivers/net/wireless/ti/wlcore/testmode.c
+++ b/drivers/net/wireless/ti/wlcore/testmode.c
@@ -45,7 +45,7 @@ enum wl1271_tm_attrs {
 };
 #define WL1271_TM_ATTR_MAX (__WL1271_TM_ATTR_AFTER_LAST - 1)
 
-static struct nla_policy wl1271_tm_policy[WL1271_TM_ATTR_MAX + 1] = {
+static const struct nla_policy wl1271_tm_policy[WL1271_TM_ATTR_MAX + 1] = {
 	[WL1271_TM_ATTR_CMD_ID] =	{ .type = NLA_U32 },
 	[WL1271_TM_ATTR_ANSWER] =	{ .type = NLA_U8 },
 	[WL1271_TM_ATTR_DATA] =		{ .type = NLA_BINARY,
-- 
2.47.0

Re: [PATCH] wlcore: testmode: Constify strutc nla_policy

Posted by Jeff Johnson 1 week, 3 days ago

On 11/11/2024 5:40 AM, Christophe JAILLET wrote:
> 'struct nla_policy' is not modified in this driver.
> 
> Constifying this structure moves some data to a read-only section, so
> increase overall security, especially when the structure holds some
> function pointers.
> 
> On a x86_64, with allmodconfig:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>    5062	    528	      0	   5590	   15d6	drivers/net/wireless/ti/wlcore/testmode.o
> 
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>    5178	    404	      0	   5582	   15ce	drivers/net/wireless/ti/wlcore/testmode.o
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>

> ---
> Compile tested only
> ---
>  drivers/net/wireless/ti/wlcore/testmode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ti/wlcore/testmode.c b/drivers/net/wireless/ti/wlcore/testmode.c
> index 3f338b8096c7..fc8ea58bc165 100644
> --- a/drivers/net/wireless/ti/wlcore/testmode.c
> +++ b/drivers/net/wireless/ti/wlcore/testmode.c
> @@ -45,7 +45,7 @@ enum wl1271_tm_attrs {
>  };
>  #define WL1271_TM_ATTR_MAX (__WL1271_TM_ATTR_AFTER_LAST - 1)
>  
> -static struct nla_policy wl1271_tm_policy[WL1271_TM_ATTR_MAX + 1] = {
> +static const struct nla_policy wl1271_tm_policy[WL1271_TM_ATTR_MAX + 1] = {
>  	[WL1271_TM_ATTR_CMD_ID] =	{ .type = NLA_U32 },
>  	[WL1271_TM_ATTR_ANSWER] =	{ .type = NLA_U8 },
>  	[WL1271_TM_ATTR_DATA] =		{ .type = NLA_BINARY,