From 6c211809c87f0de939f3bd60ceec05338ae6eba1 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 26 Oct 2020 11:00:59 +0300 Subject: devlink: Fix some error codes These paths don't set the error codes. It's especially important in devlink_nl_region_notify_build() where it leads to a NULL dereference in the caller. Fixes: 544e7c33ec2f ("net: devlink: Add support for port regions") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/20201026080059.GA1628785@mwanda Signed-off-by: Jakub Kicinski --- net/core/devlink.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/net/core/devlink.c b/net/core/devlink.c index a578634052a3..925da7c0fcf3 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -4213,10 +4213,12 @@ static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink, if (err) goto nla_put_failure; - if (region->port) - if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, - region->port->index)) + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) goto nla_put_failure; + } err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name); if (err) @@ -4265,10 +4267,12 @@ devlink_nl_region_notify_build(struct devlink_region *region, if (err) goto out_cancel_msg; - if (region->port) - if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, - region->port->index)) + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) goto out_cancel_msg; + } err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name); @@ -4962,10 +4966,12 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, if (err) goto nla_put_failure; - if (region->port) - if (nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, - region->port->index)) + if (region->port) { + err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) goto nla_put_failure; + } err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name); if (err) -- cgit v1.2.3