diff --git a/bindings.c b/bindings.c
--- a/bindings.c
+++ b/bindings.c
@@ -4037,7 +4037,7 @@ struct devinfo {
 	struct devinfo *next;
 };
 
-int getns(pid_t pid, char *ns_type)
+int getns(pid_t pid, const char *ns_type)
 {
 	char fpath[100];
 	memset(fpath, 0, sizeof(fpath));
@@ -4145,8 +4145,8 @@ child_out:
 			}
 			end->next = NULL;
 			end->name = must_copy_string(dev_name);
-			end->major = (dev_num & 0xff00) >> 8;
-			end->minor = dev_num & 0x00ff;
+			end->major = ((unsigned int)dev_num & 0xff00) >> 8;
+			end->minor = (unsigned int)dev_num & 0x00ff;
 	}
 err:
 	if (stream[0])
@@ -4185,7 +4185,7 @@ static int proc_diskstats_read(char *buf, size_t size, off_t offset,
 	char tmp_dev_name[72];
 	struct fuse_context *fc = fuse_get_context();
 	struct file_info *d = (struct file_info *)fi->fh;
-	struct devinfo *container_devinfo = NULL, *ptr;
+	struct devinfo *container_devinfo = NULL, *ptr = NULL;
 	char *cg = NULL;
 	char *io_serviced_str = NULL, *io_merged_str = NULL, *io_service_bytes_str = NULL,
 			*io_wait_time_str = NULL, *io_service_time_str = NULL;
@@ -4510,7 +4510,7 @@ static int proc_partitions_read(char *buf, size_t size, off_t offset,
 		char lbuf[256];
 
 		if (lines < 2) {
-			ret = strncpy_s(lbuf, 256, line, 255);
+			ret = strncpy_s(lbuf, sizeof(lbuf), line, sizeof(lbuf)-1);
 			if (ret != 0) {
 				lxcfs_error("%s\n", "Internal error: strncpy line failed");
 				rv = 0;