[PATCH 4.18 057/135] net/ipv6: stop leaking percpu memory in fib6 info

[Greg Kroah-Hartman]

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

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

From: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>

[ Upstream commit 7abab7b9b498650404800a08765f44929fee8f31 ]

The fib6_info_alloc() function allocates percpu memory to hold per CPU
pointers to rt6_info, but this memory is never freed. Fix it.

Fixes: a64efe142f5e ("net/ipv6: introduce fib6_info struct and helpers")
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv6/ip6_fib.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -196,6 +196,8 @@ void fib6_info_destroy_rcu(struct rcu_he
 				*ppcpu_rt = NULL;
 			}
 		}
+
+		free_percpu(f6i->rt6i_pcpu);
 	}
 
 	lwtstate_put(f6i->fib6_nh.nh_lwtstate);