Re: [PATCH net] nexthop: fix uninitialized variable in nla_put_nh_group_stats()

[Dan Carpenter]

On Mon, Mar 18, 2024 at 09:02:54AM +0100, Jiri Pirko wrote:
> Sat, Mar 16, 2024 at 10:46:03AM CET, dan.carpenter@xxxxxxxxxx wrote:
> >The nh_grp_hw_stats_update() function doesn't always set "hw_stats_used"
> >so it could be used without being initialized.  Set it to false.
> >
> >Fixes: 5072ae00aea4 ("net: nexthop: Expose nexthop group HW stats to user space")
> >Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> >---
> > net/ipv4/nexthop.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> >diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
> >index 74928a9d1aa4..c25bfdf4e25f 100644
> >--- a/net/ipv4/nexthop.c
> >+++ b/net/ipv4/nexthop.c
> >@@ -824,8 +824,8 @@ static int nla_put_nh_group_stats(struct sk_buff *skb, struct nexthop *nh,
> > 				  u32 op_flags)
> > {
> > 	struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
> >+	bool hw_stats_used = false;
> > 	struct nlattr *nest;
> >-	bool hw_stats_used;
> 
> 
> Probably better to set this in one place and have:
>        if (nexthop_notifiers_is_empty(net)) {
> 	       *hw_stats_used = false;
>                return 0;
>        }
> in nh_grp_hw_stats_update().
> 

Sure.  Will do.

regards,
dan carpenter