linux-kernel - [PATCH net v2] net: microchip: vcap: Fix initialization of value and mask

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Message-ID: <20221219082215.76652-1-horatiu.vultur@microchip.com>
Date:   Mon, 19 Dec 2022 09:22:15 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <lars.povlsen@...rochip.com>,
        <Steen.Hegelund@...rochip.com>, <daniel.machon@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        kernel test robot <lkp@...el.com>,
        "Dan Carpenter" <error27@...il.com>,
        Saeed Mahameed <saeed@...nel.org>
Subject: [PATCH net v2] net: microchip: vcap: Fix initialization of value and mask

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@...el.com>
Reported-by: Dan Carpenter <error27@...il.com>
Reviewed-by: Saeed Mahameed <saeed@...nel.org>
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
v1->v2:
- rebase on net
- both the mask and value were assigned to data->u128.value, which is
  wrong, fix this.
---
 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..e0b206247f2eb 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.mask;
 		if (key == VCAP_KF_L3_IP6_SIP || key == VCAP_KF_L3_IP6_DIP) {
 			u8 nvalue[16], nmask[16];
 
-- 
2.38.0