lib, ipcpd, irmd: Fix bugs reported by static analysis

This fixes several bugs as reported by the clang static analyzer.

4 files changed, 11 insertions, 9 deletions

diff --git a/src/ipcpd/normal/dht.c b/src/ipcpd/normal/dht.c
index b5d52d93..b5bac913 100644
--- a/src/ipcpd/normal/dht.c
+++ b/src/ipcpd/normal/dht.c
@@ -745,7 +745,8 @@ static void lookup_update(struct dht *    dht,
                 } else {
                         struct contact * d;
                         list_add_tail(&c->next, p);
-                        d = list_last_entry(&lu->contacts, struct contact, next);
+                        d = list_last_entry(&lu->contacts,
+                                            struct contact, next);
                         list_del(&d->next);
                         contact_destroy(d);
                 }
diff --git a/src/ipcpd/normal/pol/graph.c b/src/ipcpd/normal/pol/graph.c
index 3611f0b0..9901fbaa 100644
--- a/src/ipcpd/normal/pol/graph.c
+++ b/src/ipcpd/normal/pol/graph.c
@@ -454,9 +454,10 @@ ssize_t graph_routing_table(struct graph *           graph,
 
         pthread_mutex_lock(&graph->lock);
 
-        if (graph->nr_vertices == 0) {
+        /* We need at least 2 vertices for a table */
+        if (graph->nr_vertices < 2) {
                 pthread_mutex_unlock(&graph->lock);
-                return 0;
+                return -1;
         }
 
         prevs = dijkstra(graph, s_addr);
diff --git a/src/ipcpd/shim-eth-llc/main.c b/src/ipcpd/shim-eth-llc/main.c
index 3d186d7a..e5f0cba8 100644
--- a/src/ipcpd/shim-eth-llc/main.c
+++ b/src/ipcpd/shim-eth-llc/main.c
@@ -166,11 +166,13 @@ static int eth_llc_data_init(void)
         int                ret = -ENOMEM;
         pthread_condattr_t cattr;
 
-        eth_llc_data.fd_to_ef = malloc(sizeof(struct ef) * SYS_MAX_FLOWS);
+        eth_llc_data.fd_to_ef =
+                malloc(sizeof(*eth_llc_data.fd_to_ef) * SYS_MAX_FLOWS);
         if (eth_llc_data.fd_to_ef == NULL)
                 goto fail_fd_to_ef;
 
-        eth_llc_data.ef_to_fd = malloc(sizeof(struct ef) * MAX_SAPS);
+        eth_llc_data.ef_to_fd =
+                malloc(sizeof(*eth_llc_data.ef_to_fd) * MAX_SAPS);
         if (eth_llc_data.ef_to_fd == NULL)
                 goto fail_ef_to_fd;
 
diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c
index 0bf57741..b6f516bd 100644
--- a/src/ipcpd/shim-udp/main.c
+++ b/src/ipcpd/shim-udp/main.c
@@ -693,10 +693,8 @@ static uint32_t ddns_resolve(char *   name,
         char * addr_str = "Address:";
         uint32_t ip_addr = 0;
 
-        if (inet_ntop(AF_INET, &dns_addr, dnsstr, INET_ADDRSTRLEN) == NULL) {
+        if (inet_ntop(AF_INET, &dns_addr, dnsstr, INET_ADDRSTRLEN) == NULL)
                 return 0;
-        }
-
 
         if (pipe(pipe_fd)) {
                 log_err("Failed to create pipe.");
@@ -743,7 +741,7 @@ static uint32_t ddns_resolve(char *   name,
                 substr = strtok(NULL, "\n");
         }
 
-        if (strstr(substr2, addr_str) == NULL) {
+        if (substr2 == NULL || strstr(substr2, addr_str) == NULL) {
                 log_err("Failed to resolve DNS address.");
                 return 0;
         }