system-linux: Coverity fixes

Fixes CID 1220430, 1432226, 1432807 and 1433508

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

diff --git a/system-linux.c b/system-linux.c
index f63aeb26af55224ec803f9c52d343524b25c1ebb..c406a3d5085fffdbba99b47b8d30f22bed68e90f 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -139,8 +139,10 @@ create_socket(int protocol, int groups)
        if (groups)
                nl_join_groups(sock, groups);
 
-       if (nl_connect(sock, protocol))
+       if (nl_connect(sock, protocol)) {
+               nl_socket_free(sock);
                return NULL;
+       }
 
        return sock;
 }
@@ -904,7 +906,7 @@ static int cb_clear_event(struct nl_msg *msg, void *arg)
        struct clear_data *clr = arg;
        struct nlmsghdr *hdr = nlmsg_hdr(msg);
        bool (*cb)(struct nlmsghdr *, int ifindex);
-       int type;
+       int type, ret;
 
        switch(clr->type) {
        case RTM_GETADDR:
@@ -941,13 +943,23 @@ static int cb_clear_event(struct nl_msg *msg, void *arg)
                D(SYSTEM, "Remove %s from device %s\n",
                  type == RTM_DELADDR ? "an address" : "a route",
                  clr->dev->ifname);
+
        memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
        hdr = nlmsg_hdr(clr->msg);
        hdr->nlmsg_type = type;
        hdr->nlmsg_flags = NLM_F_REQUEST;
 
        nl_socket_disable_auto_ack(sock_rtnl);
-       nl_send_auto_complete(sock_rtnl, clr->msg);
+       ret = nl_send_auto_complete(sock_rtnl, clr->msg);
+       if (ret < 0) {
+               if (type == RTM_DELRULE)
+                       D(SYSTEM, "Error deleting a rule: %d\n", ret);
+               else
+                       D(SYSTEM, "Error deleting %s from device '%s': %d\n",
+                               type == RTM_DELADDR ? "an address" : "a route",
+                               clr->dev->ifname, ret);
+       }
+
        nl_socket_enable_auto_ack(sock_rtnl);
 
        return NL_SKIP;
@@ -981,6 +993,9 @@ system_if_clear_entries(struct device *dev, int type, int af)
        int flags = NLM_F_DUMP;
        int pending = 1;
 
+       if (!cb)
+               return;
+
        clr.af = af;
        clr.dev = dev;
        clr.type = type;
@@ -996,9 +1011,6 @@ system_if_clear_entries(struct device *dev, int type, int af)
                return;
        }
 
-       if (!cb)
-               return;
-
        clr.msg = nlmsg_alloc_simple(type, flags);
        if (!clr.msg)
                goto out;
@@ -1008,10 +1020,13 @@ system_if_clear_entries(struct device *dev, int type, int af)
        nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
        nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
 
-       nl_send_auto_complete(sock_rtnl, clr.msg);
+       if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
+               goto free;
+
        while (pending > 0)
                nl_recvmsgs(sock_rtnl, cb);
 
+free:
        nlmsg_free(clr.msg);
 out:
        nl_cb_put(cb);
@@ -1656,7 +1671,10 @@ int system_if_check(struct device *dev)
        nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
        nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
 
-       nl_send_auto_complete(sock_rtnl, msg);
+       ret = nl_send_auto_complete(sock_rtnl, msg);
+       if (ret < 0)
+               goto free;
+
        while (chk.pending > 0)
                nl_recvmsgs(sock_rtnl, cb);