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authorAaron Conole <aconole@redhat.com>2022-12-20 16:27:17 -0500
committerJakub Kicinski <kuba@kernel.org>2022-12-21 17:48:12 -0800
commit95637d91fefdb94d6e7389222ba9ddab0e9f5abe (patch)
tree693a4ce55280a7a1108b518fc68d7d1b4fcad492 /net
parentf2575c8f404911da83f25b688e12afcf4273e640 (diff)
net: openvswitch: release vport resources on failure
A recent commit introducing upcall packet accounting failed to properly release the vport object when the per-cpu stats struct couldn't be allocated. This can cause dangling pointers to dp objects long after they've been released. Cc: wangchuanlei <wangchuanlei@inspur.com> Fixes: 1933ea365aa7 ("net: openvswitch: Add support to count upcall packets") Reported-by: syzbot+8f4e2dcfcb3209ac35f9@syzkaller.appspotmail.com Signed-off-by: Aaron Conole <aconole@redhat.com> Acked-by: Eelco Chaudron <echaudro@redhat.com> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com> Link: https://lore.kernel.org/r/20221220212717.526780-1-aconole@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/openvswitch/datapath.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 9ca721c9fa71..a71795355aec 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1861,7 +1861,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
vport->upcall_stats = netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
if (!vport->upcall_stats) {
err = -ENOMEM;
- goto err_destroy_portids;
+ goto err_destroy_vport;
}
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
@@ -1876,6 +1876,8 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
ovs_notify(&dp_datapath_genl_family, reply, info);
return 0;
+err_destroy_vport:
+ ovs_dp_detach_port(vport);
err_destroy_portids:
kfree(rcu_dereference_raw(dp->upcall_portids));
err_unlock_and_destroy_meters:
@@ -2323,7 +2325,7 @@ restart:
vport->upcall_stats = netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
if (!vport->upcall_stats) {
err = -ENOMEM;
- goto exit_unlock_free;
+ goto exit_unlock_free_vport;
}
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
@@ -2343,6 +2345,8 @@ restart:
ovs_notify(&dp_vport_genl_family, reply, info);
return 0;
+exit_unlock_free_vport:
+ ovs_dp_detach_port(vport);
exit_unlock_free:
ovs_unlock();
kfree_skb(reply);