malloc/free: some cleaning & checking malloc errors

libnfc/drivers/acr122_pcsc.c

@@ -261,9 +261,15 @@ acr122_pcsc_open(const nfc_context *context, const nfc_connstring connstring)
     if (sscanf(ndd.pcsc_device_name, "%lu", &index) != 1)
       return NULL;
     nfc_connstring *ncs = malloc(sizeof(nfc_connstring) * (index + 1));
-    size_t szDeviceFound = acr122_pcsc_scan(context, ncs, index + 1);
-    if (szDeviceFound < index + 1)
+    if (!ncs) {
+      perror("malloc");
       return NULL;
+    }
+    size_t szDeviceFound = acr122_pcsc_scan(context, ncs, index + 1);
+    if (szDeviceFound < index + 1) {
+      free(ncs);
+      return NULL;
+    }
     strncpy(fullconnstring, ncs[index], sizeof(nfc_connstring));
     free(ncs);
     connstring_decode_level = acr122_pcsc_connstring_decode(fullconnstring, &ndd);
@@ -275,6 +281,10 @@ acr122_pcsc_open(const nfc_context *context, const nfc_connstring connstring)
   char   *pcFirmware;
   nfc_device *pnd = nfc_device_new(context, fullconnstring);
   pnd->driver_data = malloc(sizeof(struct acr122_pcsc_data));
+  if (!pnd->driver_data) {
+    perror("malloc");
+    goto error;
+  }
 
   // Alloc and init chip's data
   pn53x_data_new(pnd, &acr122_pcsc_io);

libnfc/drivers/acr122_usb.c

@@ -351,8 +351,23 @@ acr122_usb_connstring_decode(const nfc_connstring connstring, struct acr122_usb_
 {
   int n = strlen(connstring) + 1;
   char *driver_name = malloc(n);
+  if (!driver_name) {
+    perror("malloc");
+    return 0;
+  }
   char *dirname     = malloc(n);
+  if (!dirname) {
+    perror("malloc");
+    free(driver_name);
+    return 0;
+  }
   char *filename    = malloc(n);
+  if (!filename) {
+    perror("malloc");
+    free(driver_name);
+    free(dirname);
+    return 0;
+  }
 
   driver_name[0] = '\0';
 
@@ -462,6 +477,10 @@ acr122_usb_open(const nfc_context *context, const nfc_connstring connstring)
       acr122_usb_get_usb_device_name(dev, data.pudh, pnd->name, sizeof(pnd->name));
 
       pnd->driver_data = malloc(sizeof(struct acr122_usb_data));
+      if (!pnd->driver_data) {
+        perror("malloc");
+        goto error;
+      }
       *DRIVER_DATA(pnd) = data;
 
       // Alloc and init chip's data

libnfc/drivers/acr122s.c

@@ -473,6 +473,10 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
 
       pnd->driver = &acr122s_driver;
       pnd->driver_data = malloc(sizeof(struct acr122s_data));
+      if (!pnd->driver_data) {
+        perror("malloc");
+        return -1;
+      }
       DRIVER_DATA(pnd)->port = sp;
       DRIVER_DATA(pnd)->seq = 0;
 
@@ -574,6 +578,12 @@ acr122s_open(const nfc_context *context, const nfc_connstring connstring)
   strcpy(pnd->name, ACR122S_DRIVER_NAME);
 
   pnd->driver_data = malloc(sizeof(struct acr122s_data));
+  if (!pnd->driver_data) {
+    perror("malloc");
+    acr122s_close(pnd);
+    return NULL;
+  }
+
   DRIVER_DATA(pnd)->port = sp;
   DRIVER_DATA(pnd)->seq = 0;
 

libnfc/drivers/arygon.c

@@ -117,6 +117,10 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
 
       pnd->driver = &arygon_driver;
       pnd->driver_data = malloc(sizeof(struct arygon_data));
+      if (!pnd->driver_data) {
+        perror("malloc");
+        return 0;
+      }
       DRIVER_DATA(pnd)->port = sp;
 
       // Alloc and init chip's data
@@ -262,6 +266,10 @@ arygon_open(const nfc_context *context, const nfc_connstring connstring)
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", ARYGON_DRIVER_NAME, ndd.port);
 
   pnd->driver_data = malloc(sizeof(struct arygon_data));
+  if (!pnd->driver_data) {
+    perror("malloc");
+    return NULL;
+  }
   DRIVER_DATA(pnd)->port = sp;
 
   // Alloc and init chip's data

libnfc/drivers/pn532_uart.c

@@ -90,6 +90,10 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
       nfc_device *pnd = nfc_device_new(context, connstring);
       pnd->driver = &pn532_uart_driver;
       pnd->driver_data = malloc(sizeof(struct pn532_uart_data));
+      if (!pnd->driver_data) {
+        perror("malloc");
+        return 0;
+      }
       DRIVER_DATA(pnd)->port = sp;
 
       // Alloc and init chip's data
@@ -239,6 +243,10 @@ pn532_uart_open(const nfc_context *context, const nfc_connstring connstring)
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", PN532_UART_DRIVER_NAME, ndd.port);
 
   pnd->driver_data = malloc(sizeof(struct pn532_uart_data));
+  if (!pnd->driver_data) {
+    perror("malloc");
+    return NULL;
+  }
   DRIVER_DATA(pnd)->port = sp;
 
   // Alloc and init chip's data

libnfc/drivers/pn53x_usb.c

@@ -234,8 +234,23 @@ pn53x_usb_connstring_decode(const nfc_connstring connstring, struct pn53x_usb_de
 {
   int n = strlen(connstring) + 1;
   char *driver_name = malloc(n);
+  if (!driver_name) {
+    perror("malloc");
+    return 0;
+  }
   char *dirname     = malloc(n);
+  if (!dirname) {
+    perror("malloc");
+    free(driver_name);
+    return 0;
+  }
   char *filename    = malloc(n);
+  if (!filename) {
+    perror("malloc");
+    free(driver_name);
+    free(dirname);
+    return 0;
+  }
 
   driver_name[0] = '\0';
 
@@ -345,6 +360,10 @@ pn53x_usb_open(const nfc_context *context, const nfc_connstring connstring)
       pn53x_usb_get_usb_device_name(dev, data.pudh, pnd->name, sizeof(pnd->name));
 
       pnd->driver_data = malloc(sizeof(struct pn53x_usb_data));
+      if (!pnd->driver_data) {
+        perror("malloc");
+        goto error;
+      }
       *DRIVER_DATA(pnd) = data;
 
       // Alloc and init chip's data