netdev - [net-next 01/10] devlink: Fix param set handling for string type

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Date:   Wed,  1 Aug 2018 14:52:46 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Jiri Pirko <jiri@...lanox.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Moshe Shemesh <moshe@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 01/10] devlink: Fix param set handling for string type

From: Moshe Shemesh <moshe@...lanox.com>

In case devlink param type is string, it needs to copy the string value
it got from the input to devlink_param_value.

Fixes: e3b7ca18ad7b ("devlink: Add param set command")
Signed-off-by: Moshe Shemesh <moshe@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 include/net/devlink.h | 2 +-
 net/core/devlink.c    | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index b9b89d6604d4..b0e17c025fdc 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -311,7 +311,7 @@ union devlink_param_value {
 	u8 vu8;
 	u16 vu16;
 	u32 vu32;
-	const char *vstr;
+	char vstr[DEVLINK_PARAM_MAX_STRING_VALUE];
 	bool vbool;
 };
 
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 65fc366a78a4..61e126c28526 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3014,7 +3014,8 @@ devlink_param_value_get_from_info(const struct devlink_param *param,
 		if (nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) >
 		    DEVLINK_PARAM_MAX_STRING_VALUE)
 			return -EINVAL;
-		value->vstr = nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
+		strcpy(value->vstr,
+		       nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
 		break;
 	case DEVLINK_PARAM_TYPE_BOOL:
 		value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
-- 
2.17.0