[PATCH net-next] net: microchip: vcap: Fix initialization of value and mask

[PATCH net-next] net: microchip: vcap: Fix initialization of value and mask

[Horatiu Vultur]

Fix the following smatch warning:

smatch warnings:
drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c:103 vcap_debugfs_show_rule_keyfield() error: uninitialized symbol 'value'.
drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c:106 vcap_debugfs_show_rule_keyfield() error: uninitialized symbol 'mask'.

In case the vcap field was VCAP_FIELD_U128 and the key was different
than IP6_S/DIP then the value and mask were not initialized, therefore
initialize them.

Fixes: 610c32b2ce66 ("net: microchip: vcap: Add vcap_get_rule")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
index 895bfff550d23..1237601ac9dc1 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
@@ -83,6 +83,8 @@ static void vcap_debugfs_show_rule_keyfield(struct vcap_control *vctrl,
 		hex = true;
 		break;
 	case VCAP_FIELD_U128:
+		value = data->u128.value;
+		mask = data->u128.value;
 		if (key == VCAP_KF_L3_IP6_SIP || key == VCAP_KF_L3_IP6_DIP) {
 			u8 nvalue[16], nmask[16];
 
-- 
2.38.0

Re: [PATCH net-next] net: microchip: vcap: Fix initialization of value and mask

[Saeed Mahameed]

On 09 Dec 13:07, Horatiu Vultur wrote:
>Fix the following smatch warning:
>
>smatch warnings:
>drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c:103 vcap_debugfs_show_rule_keyfield() error: uninitialized symbol 'value'.
>drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c:106 vcap_debugfs_show_rule_keyfield() error: uninitialized symbol 'mask'.
>
>In case the vcap field was VCAP_FIELD_U128 and the key was different
>than IP6_S/DIP then the value and mask were not initialized, therefore
>initialize them.
>
>Fixes: 610c32b2ce66 ("net: microchip: vcap: Add vcap_get_rule")
>Reported-by: kernel test robot <lkp@intel.com>
>Reported-by: Dan Carpenter <error27@gmail.com>
>Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>

Reviewed-by: Saeed Mahameed <saeed@kernel.org>

Re: [PATCH net-next] net: microchip: vcap: Fix initialization of value and mask

[Jakub Kicinski]

On Fri, 9 Dec 2022 13:07:01 +0100 Horatiu Vultur wrote:
>  	case VCAP_FIELD_U128:
> +		value = data->u128.value;
> +		mask = data->u128.value;

If setting both to value is intentional - please mention in the commit
message. Otherwise this looks odd.

Re: [PATCH net-next] net: microchip: vcap: Fix initialization of value and mask

[Horatiu Vultur]

The 12/12/2022 13:02, Jakub Kicinski wrote:
> 
> On Fri, 9 Dec 2022 13:07:01 +0100 Horatiu Vultur wrote:
> >       case VCAP_FIELD_U128:
> > +             value = data->u128.value;
> > +             mask = data->u128.value;
> 
> If setting both to value is intentional - please mention in the commit
> message. Otherwise this looks odd.

It should not be both set to value. Will fix this in th next version.

-- 
/Horatiu