[PATCH 4.19 15/42] net/sched: act_pedit: fix memory leak when IDR allocation fails

[Greg Kroah-Hartman]

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Davide Caratti <dcara...@redhat.com>

[ Upstream commit 19ab69107d3ecfb7cd3e38ad262a881be40c01a3 ]

tcf_idr_check_alloc() can return a negative value, on allocation failures
(-ENOMEM) or IDR exhaustion (-ENOSPC): don't leak keys_ex in these cases.

Fixes: 0190c1d452a9 ("net: sched: atomically check-allocate action")
Signed-off-by: Davide Caratti <dcara...@redhat.com>
Acked-by: Cong Wang <xiyou.wangc...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/sched/act_pedit.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -201,7 +201,8 @@ static int tcf_pedit_init(struct net *ne
                        goto out_release;
                }
        } else {
-               return err;
+               ret = err;
+               goto out_free;
        }
 
        p = to_pedit(*a);