diff options
| author | Wen Gu <guwen@linux.alibaba.com> | 2024-05-07 20:53:31 +0800 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-05-09 10:03:43 +0200 |
| commit | 2ddc0dd7fec86ee53b8928a5cca5fbddd4fc7c06 (patch) | |
| tree | 745697c986640d886499ac7311922e435b0bc3c6 | |
| parent | 4db783d68b9b39a411a96096c10828ff5dfada7a (diff) | |
| download | linux-2ddc0dd7fec86ee53b8928a5cca5fbddd4fc7c06.tar.gz | |
net/smc: fix neighbour and rtable leak in smc_ib_find_route()
In smc_ib_find_route(), the neighbour found by neigh_lookup() and rtable
resolved by ip_route_output_flow() are not released or put before return.
It may cause the refcount leak, so fix it.
Link: https://lore.kernel.org/r/20240506015439.108739-1-guwen@linux.alibaba.com
Fixes: e5c4744cfb59 ("net/smc: add SMC-Rv2 connection establishment")
Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240507125331.2808-1-guwen@linux.alibaba.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | net/smc/smc_ib.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c index 97704a9e84c701..9297dc20bfe237 100644 --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -209,13 +209,18 @@ int smc_ib_find_route(struct net *net, __be32 saddr, __be32 daddr, if (IS_ERR(rt)) goto out; if (rt->rt_uses_gateway && rt->rt_gw_family != AF_INET) - goto out; - neigh = rt->dst.ops->neigh_lookup(&rt->dst, NULL, &fl4.daddr); - if (neigh) { - memcpy(nexthop_mac, neigh->ha, ETH_ALEN); - *uses_gateway = rt->rt_uses_gateway; - return 0; - } + goto out_rt; + neigh = dst_neigh_lookup(&rt->dst, &fl4.daddr); + if (!neigh) + goto out_rt; + memcpy(nexthop_mac, neigh->ha, ETH_ALEN); + *uses_gateway = rt->rt_uses_gateway; + neigh_release(neigh); + ip_rt_put(rt); + return 0; + +out_rt: + ip_rt_put(rt); out: return -ENOENT; } |