Fixing Coverity warnings.

CID 200496
CID 200494
CID 200490
CID 200489
CID 200483
CID 200482
CID 200472
CID 200465

7 files changed, 23 insertions, 10 deletions

diff --git a/src/nxt_list.h b/src/nxt_list.h
index f400a356..ecbb67a9 100644
--- a/src/nxt_list.h
+++ b/src/nxt_list.h
@@ -13,6 +13,7 @@ typedef struct nxt_list_part_s  nxt_list_part_t;
 struct nxt_list_part_s {
     nxt_list_part_t             *next;
     uintptr_t                   nelts;
+    char                        data[];
 };
 
 
@@ -43,12 +44,12 @@ nxt_list_part(list)                                                           \
 
 #define                                                                       \
 nxt_list_data(part)                                                           \
-    nxt_pointer_to(part, sizeof(nxt_list_part_t))
+    ((void *) part->data)
 
 
 #define                                                                       \
 nxt_list_first(list)                                                          \
-    (void *) nxt_list_data(nxt_list_part(list))
+    nxt_list_data(nxt_list_part(list))
 
 
 nxt_inline void *
@@ -80,7 +81,7 @@ nxt_list_elt(nxt_list_t *list, nxt_uint_t n)
             nxt_list_part_t  *_part = nxt_list_part(list);                    \
                                                                               \
             do {                                                              \
-                elt = (void *) nxt_list_data(_part);                          \
+                elt = nxt_list_data(_part);                                   \
                                                                               \
                 for (_end = (elt + _part->nelts); elt != _end; elt++) {       \
 
diff --git a/src/nxt_main_process.c b/src/nxt_main_process.c
index 7d0050c4..767d6063 100644
--- a/src/nxt_main_process.c
+++ b/src/nxt_main_process.c
@@ -808,6 +808,9 @@ nxt_main_cleanup_worker_process(nxt_task_t *task, nxt_pid_t pid)
 
                 buf = nxt_buf_mem_ts_alloc(task, task->thread->engine->mem_pool,
                                            sizeof(pid));
+
+                nxt_assert(buf != NULL);
+
                 buf->mem.free = nxt_cpymem(buf->mem.free, &pid, sizeof(pid));
 
                 nxt_port_socket_write(task, port, NXT_PORT_MSG_REMOVE_PID,
diff --git a/src/nxt_port.c b/src/nxt_port.c
index c63ea01b..4a07657d 100644
--- a/src/nxt_port.c
+++ b/src/nxt_port.c
@@ -311,10 +311,9 @@ nxt_port_process_ready_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
 
     process->ready = 1;
 
+    nxt_assert(nxt_queue_is_empty(&process->ports) == 0);
+
     port = nxt_process_port_first(process);
-    if (nxt_slow_path(port == NULL)) {
-        return;
-    }
 
     nxt_debug(task, "process %PI ready", msg->port_msg.pid);
 
@@ -348,7 +347,7 @@ nxt_port_mmap_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
 
 fail_close:
 
-    close(msg->fd);
+    nxt_fd_close(msg->fd);
 }
 
 
diff --git a/src/nxt_port_memory.c b/src/nxt_port_memory.c
index 71ab1d60..9f27ab09 100644
--- a/src/nxt_port_memory.c
+++ b/src/nxt_port_memory.c
@@ -191,7 +191,6 @@ nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process,
               fd, process->pid);
 
     port_mmap = NULL;
-    hdr = NULL;
 
     if (fstat(fd, &mmap_stat) == -1) {
         nxt_log(task, NXT_LOG_WARN, "fstat(%FD) failed %E", fd, nxt_errno);
@@ -214,6 +213,8 @@ nxt_port_incoming_port_mmap(nxt_task_t *task, nxt_process_t *process,
     if (nxt_slow_path(mmap_handler == NULL)) {
         nxt_log(task, NXT_LOG_WARN, "failed to allocate mmap_handler");
 
+        nxt_mem_munmap(mem, PORT_MMAP_SIZE);
+
         return NULL;
     }
 
diff --git a/src/nxt_process.c b/src/nxt_process.c
index 4d0241ec..f1c00e4e 100644
--- a/src/nxt_process.c
+++ b/src/nxt_process.c
@@ -299,6 +299,8 @@ nxt_process_daemon(nxt_task_t *task)
     nxt_pid_t     pid;
     const char    *msg;
 
+    fd = -1;
+
     /*
      * fork() followed by a parent process's exit() detaches a child process
      * from an init script or terminal shell process which has started the
@@ -372,6 +374,10 @@ fail:
 
     nxt_log(task, NXT_LOG_CRIT, msg, nxt_errno);
 
+    if (fd != -1) {
+        nxt_fd_close(fd);
+    }
+
     return NXT_ERROR;
 }
 
diff --git a/src/nxt_python_wsgi.c b/src/nxt_python_wsgi.c
index 33d9456a..51d9d800 100644
--- a/src/nxt_python_wsgi.c
+++ b/src/nxt_python_wsgi.c
@@ -298,8 +298,8 @@ nxt_python_init(nxt_task_t *task, nxt_common_app_conf_t *conf)
 
 fail:
 
-    Py_DECREF(obj);
-    Py_DECREF(module);
+    Py_XDECREF(obj);
+    Py_XDECREF(module);
 
     return NXT_ERROR;
 }
diff --git a/src/nxt_runtime.c b/src/nxt_runtime.c
index 60ce45f6..d07a1b3b 100644
--- a/src/nxt_runtime.c
+++ b/src/nxt_runtime.c
@@ -1696,6 +1696,9 @@ nxt_runtime_process_get(nxt_runtime_t *rt, nxt_pid_t pid)
 
     process = nxt_runtime_process_new(rt);
     if (nxt_slow_path(process == NULL)) {
+
+        nxt_thread_mutex_unlock(&rt->processes_mutex);
+
         return NULL;
     }