diff --git a/adb/commandline.cpp b/adb/commandline.cpp
index 58e1ade..c503558 100644
--- a/adb/commandline.cpp
+++ b/adb/commandline.cpp
@@ -312,6 +312,7 @@
 static void copy_to_file(int inFd, int outFd) {
     const size_t BUFSIZE = 32 * 1024;
     char* buf = (char*) malloc(BUFSIZE);
+    if (buf == nullptr) fatal("couldn't allocate buffer for copy_to_file");
     int len;
     long total = 0;
 
@@ -419,6 +420,11 @@
     fdi = 0; //dup(0);
 
     int* fds = reinterpret_cast<int*>(malloc(sizeof(int) * 2));
+    if (fds == nullptr) {
+        fprintf(stderr, "couldn't allocate fds array: %s\n", strerror(errno));
+        return 1;
+    }
+
     fds[0] = fd;
     fds[1] = fdi;
 
diff --git a/adb/services.cpp b/adb/services.cpp
index ff13722..e6c84a4 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -689,6 +689,10 @@
         return create_device_tracker();
     } else if (!strncmp(name, "wait-for-", strlen("wait-for-"))) {
         auto sinfo = reinterpret_cast<state_info*>(malloc(sizeof(state_info)));
+        if (sinfo == nullptr) {
+            fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno));
+            return NULL;
+        }
 
         if (serial)
             sinfo->serial = strdup(serial);
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 37f9d7b..d395a80 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -493,10 +493,8 @@
 asocket*
 create_device_tracker(void)
 {
-    device_tracker* tracker = reinterpret_cast<device_tracker*>(
-        calloc(1, sizeof(*tracker)));
-
-    if(tracker == 0) fatal("cannot allocate device tracker");
+    device_tracker* tracker = reinterpret_cast<device_tracker*>(calloc(1, sizeof(*tracker)));
+    if (tracker == nullptr) fatal("cannot allocate device tracker");
 
     D( "device tracker %p created\n", tracker);
 
@@ -1002,8 +1000,11 @@
 
 int register_socket_transport(int s, const char *serial, int port, int local)
 {
-    atransport *t = reinterpret_cast<atransport*>(
-        calloc(1, sizeof(atransport)));
+    atransport *t = reinterpret_cast<atransport*>(calloc(1, sizeof(atransport)));
+    if (t == nullptr) {
+        return -1;
+    }
+
     atransport *n;
     char buff[32];
 
@@ -1102,8 +1103,8 @@
 
 void register_usb_transport(usb_handle *usb, const char *serial, const char *devpath, unsigned writeable)
 {
-    atransport *t = reinterpret_cast<atransport*>(
-        calloc(1, sizeof(atransport)));
+    atransport *t = reinterpret_cast<atransport*>(calloc(1, sizeof(atransport)));
+    if (t == nullptr) fatal("cannot allocate USB atransport");
     D("transport: %p init'ing for usb_handle %p (sn='%s')\n", t, usb,
       serial ? serial : "");
     init_usb_transport(t, usb, (writeable ? CS_OFFLINE : CS_NOPERM));
diff --git a/adb/usb_linux.cpp b/adb/usb_linux.cpp
index 6fd2b40..9f23511 100644
--- a/adb/usb_linux.cpp
+++ b/adb/usb_linux.cpp
@@ -598,8 +598,8 @@
 
     D("[ usb located new device %s (%d/%d/%d) ]\n",
         dev_name, ep_in, ep_out, interface);
-    usb_handle* usb = reinterpret_cast<usb_handle*>(
-        calloc(1, sizeof(usb_handle)));
+    usb_handle* usb = reinterpret_cast<usb_handle*>(calloc(1, sizeof(usb_handle)));
+    if (usb == nullptr) fatal("couldn't allocate usb_handle");
     strcpy(usb->fname, dev_name);
     usb->ep_in = ep_in;
     usb->ep_out = ep_out;
diff --git a/adb/usb_linux_client.cpp b/adb/usb_linux_client.cpp
index 6d21104..18289e2 100644
--- a/adb/usb_linux_client.cpp
+++ b/adb/usb_linux_client.cpp
@@ -241,6 +241,8 @@
 static void usb_adb_init()
 {
     usb_handle* h = reinterpret_cast<usb_handle*>(calloc(1, sizeof(usb_handle)));
+    if (h == nullptr) fatal("couldn't allocate usb_handle");
+
     h->write = usb_adb_write;
     h->read = usb_adb_read;
     h->kick = usb_adb_kick;
@@ -468,6 +470,8 @@
     D("[ usb_init - using FunctionFS ]\n");
 
     usb_handle* h = reinterpret_cast<usb_handle*>(calloc(1, sizeof(usb_handle)));
+    if (h == nullptr) fatal("couldn't allocate usb_handle");
+
     h->write = usb_ffs_write;
     h->read = usb_ffs_read;
     h->kick = usb_ffs_kick;
diff --git a/adb/usb_osx.cpp b/adb/usb_osx.cpp
index 303ae45..a795ce3 100644
--- a/adb/usb_osx.cpp
+++ b/adb/usb_osx.cpp
@@ -336,6 +336,7 @@
         goto err_bad_adb_interface;
 
     handle = reinterpret_cast<usb_handle*>(calloc(1, sizeof(usb_handle)));
+    if (handle == nullptr) goto err_bad_adb_interface;
 
     //* Iterate over the endpoints for this interface and find the first
     //* bulk in/out pipes available.  These will be our read/write pipes.