Dan Carpenter <dan.carpenter@xxxxxxxxxx> writes:
> There is a dereference before checking for NULL bug here. Generally
> free() functions should accept NULL pointers. For example, fl_create()
> can pass a NULL pointer to fl_free() on the error path.
Thanks.
Applied to user-namespace.git
Eric
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> Only needed on linux-next.
>
> diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
> index c836a6a..90bbefb 100644
> --- a/net/ipv6/ip6_flowlabel.c
> +++ b/net/ipv6/ip6_flowlabel.c
> @@ -91,12 +91,9 @@ static struct ip6_flowlabel *fl_lookup(struct net *net, __be32 label)
>
> static void fl_free(struct ip6_flowlabel *fl)
> {
> - switch (fl->share) {
> - case IPV6_FL_S_PROCESS:
> - put_pid(fl->owner.pid);
> - break;
> - }
> if (fl) {
> + if (fl->share == IPV6_FL_S_PROCESS)
> + put_pid(fl->owner.pid);
> release_net(fl->fl_net);
> kfree(fl->opt);
> }
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