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Subject[PATCH 5.3 115/140] net/mlx5: Fix rtable reference leak
Date
From: Parav Pandit <parav@mellanox.com>

[ Upstream commit 2347cee83b2bd868bde2d283db0fac89f22be4e0 ]

If the rt entry gateway family is not AF_INET for multipath device,
rtable reference is leaked.
Hence, fix it by releasing the reference.

Fixes: 5fb091e8130b ("net/mlx5e: Use hint to resolve route when in HW multipath mode")
Fixes: e32ee6c78efa ("net/mlx5e: Support tunnel encap over tagged Ethernet")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -90,15 +90,19 @@ static int mlx5e_route_lookup_ipv4(struc
if (ret)
return ret;

- if (mlx5_lag_is_multipath(mdev) && rt->rt_gw_family != AF_INET)
+ if (mlx5_lag_is_multipath(mdev) && rt->rt_gw_family != AF_INET) {
+ ip_rt_put(rt);
return -ENETUNREACH;
+ }
#else
return -EOPNOTSUPP;
#endif

ret = get_route_and_out_devs(priv, rt->dst.dev, route_dev, out_dev);
- if (ret < 0)
+ if (ret < 0) {
+ ip_rt_put(rt);
return ret;
+ }

if (!(*out_ttl))
*out_ttl = ip4_dst_hoplimit(&rt->dst);
@@ -142,8 +146,10 @@ static int mlx5e_route_lookup_ipv6(struc
*out_ttl = ip6_dst_hoplimit(dst);

ret = get_route_and_out_devs(priv, dst->dev, route_dev, out_dev);
- if (ret < 0)
+ if (ret < 0) {
+ dst_release(dst);
return ret;
+ }
#else
return -EOPNOTSUPP;
#endif

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