net/sched: avoid double free on matchall reoffload

Avoid freeing cls_mall.rule twice when failing to setup flow_action
offload used in the hardware intermediate representation. This is
achieved by returning 0 when the setup fails but the skip software
flag has not been set.

Fixes: f00cbf196814 ("net/sched: use the hardware intermediate representation for matchall")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 1e98a517fb0b47f59c2cdf0235245e36c08a4222..db42d97a200644835a79ab8bae8fb6a0d7907985 100644 (file)
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -308,6 +308,7 @@ static int mall_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
                        NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
                        return err;
                }
+               return 0;
        }
 
        err = cb(TC_SETUP_CLSMATCHALL, &cls_mall, cb_priv);