bluez: extend fuzzing (#8844)

Signed-off-by: David Korczynski <david@adalogics.com>

Signed-off-by: David Korczynski <david@adalogics.com>

projects/bluez/build.sh

@@ -38,3 +38,7 @@ $CC $CFLAGS $LIB_FUZZING_ENGINE $INCLUDES \
 $CC $CFLAGS $LIB_FUZZING_ENGINE $INCLUDES \
  $SRC/fuzz_gobex.c ./gobex/gobex*.o -o $OUT/fuzz_gobex \
  $STATIC_LIBS -ldl -lpthread
+
+$CC $CFLAGS $LIB_FUZZING_ENGINE $INCLUDES \
+ $SRC/fuzz_hci.c ./gobex/gobex*.o -o $OUT/fuzz_hci \
+ $STATIC_LIBS -ldl -lpthread

projects/bluez/fuzz_hci.c

@@ -0,0 +1,63 @@
+/* Copyright 2022 Google LLC
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+      http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#include <config.h>
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+
+#include "bluetooth.h"
+#include "sdp.h"
+#include "sdp_lib.h"
+#include "hci_lib.h"
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  int to_copy = size;
+  uint8_t features[8];
+
+  if (size > 8) {
+    to_copy = 8;
+  }
+
+  char *null_terminated = malloc(to_copy+1);
+  memcpy(null_terminated, data, to_copy);
+  null_terminated[to_copy] = '\0';
+
+  char *tmp = lmp_featurestostr(features, null_terminated, to_copy);
+  if (tmp) {
+    free(tmp);
+  }
+  tmp = NULL;
+
+  size -= to_copy;
+  data += to_copy;
+
+  uint8_t cmds[64];
+  bzero(cmds, 64);
+  for (int i = 0; i < 64 && i < size; i++) {
+    cmds[i] = data[i];
+  }
+  tmp = hci_commandstostr(cmds, NULL, 0);
+  if (tmp) {
+    free(tmp);
+  }
+
+  if (size > 4) {
+    uint16_t id = *(uint16_t*)data;
+    bt_compidtostr(id);
+  }
+
+  free(null_terminated);
+  return 0;
+}