diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index 39d7fff..4cd6193 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -2759,3 +2759,48 @@
   ASSERT_BACKTRACE_FRAME(result, "raise_debugger_signal");
   ASSERT_NOT_MATCH(result, kLogMessage);
 }
+
+// Disable this test since there is a high liklihood that this would
+// be flaky since it requires 500 messages being in the log.
+TEST_F(CrasherTest, DISABLED_max_log_messages) {
+  StartProcess([]() {
+    for (size_t i = 0; i < 600; i++) {
+      LOG(INFO) << "Message number " << i;
+    }
+    abort();
+  });
+
+  unique_fd output_fd;
+  StartIntercept(&output_fd);
+  FinishCrasher();
+  AssertDeath(SIGABRT);
+  int intercept_result;
+  FinishIntercept(&intercept_result);
+  ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";
+
+  std::string result;
+  ConsumeFd(std::move(output_fd), &result);
+  ASSERT_NOT_MATCH(result, "Message number 99");
+  ASSERT_MATCH(result, "Message number 100");
+  ASSERT_MATCH(result, "Message number 599");
+}
+
+TEST_F(CrasherTest, log_with_newline) {
+  StartProcess([]() {
+    LOG(INFO) << "This line has a newline.\nThis is on the next line.";
+    abort();
+  });
+
+  unique_fd output_fd;
+  StartIntercept(&output_fd);
+  FinishCrasher();
+  AssertDeath(SIGABRT);
+  int intercept_result;
+  FinishIntercept(&intercept_result);
+  ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";
+
+  std::string result;
+  ConsumeFd(std::move(output_fd), &result);
+  ASSERT_MATCH(result, ":\\s*This line has a newline.");
+  ASSERT_MATCH(result, ":\\s*This is on the next line.");
+}
diff --git a/debuggerd/libdebuggerd/tombstone_proto.cpp b/debuggerd/libdebuggerd/tombstone_proto.cpp
index acd814e..7b2e068 100644
--- a/debuggerd/libdebuggerd/tombstone_proto.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto.cpp
@@ -70,6 +70,9 @@
 
 using android::base::StringPrintf;
 
+// The maximum number of messages to save in the protobuf per file.
+static constexpr size_t kMaxLogMessages = 500;
+
 // Use the demangler from libc++.
 extern "C" char* __cxa_demangle(const char*, char*, size_t*, int* status);
 
@@ -491,8 +494,8 @@
 }
 
 static void dump_log_file(Tombstone* tombstone, const char* logger, pid_t pid) {
-  logger_list* logger_list =
-      android_logger_list_open(android_name_to_log_id(logger), ANDROID_LOG_NONBLOCK, 0, pid);
+  logger_list* logger_list = android_logger_list_open(android_name_to_log_id(logger),
+                                                      ANDROID_LOG_NONBLOCK, kMaxLogMessages, pid);
 
   LogBuffer buffer;
 
diff --git a/toolbox/modprobe.cpp b/toolbox/modprobe.cpp
index 17f8156..17d4e31 100644
--- a/toolbox/modprobe.cpp
+++ b/toolbox/modprobe.cpp
@@ -85,6 +85,26 @@
     }
 }
 
+// Find directories in format of "/lib/modules/x.y.z-*".
+static int KernelVersionNameFilter(const dirent* de) {
+    unsigned int major, minor;
+    static std::string kernel_version;
+    utsname uts;
+
+    if (kernel_version.empty()) {
+        if ((uname(&uts) != 0) || (sscanf(uts.release, "%u.%u", &major, &minor) != 2)) {
+            LOG(ERROR) << "Could not parse the kernel version from uname";
+            return 0;
+        }
+        kernel_version = android::base::StringPrintf("%u.%u", major, minor);
+    }
+
+    if (android::base::StartsWith(de->d_name, kernel_version)) {
+        return 1;
+    }
+    return 0;
+}
+
 }  // anonymous namespace
 
 extern "C" int modprobe_main(int argc, char** argv) {
@@ -192,9 +212,22 @@
     }
 
     if (mod_dirs.empty()) {
-        utsname uts;
-        uname(&uts);
-        mod_dirs.emplace_back(android::base::StringPrintf("/lib/modules/%s", uts.release));
+        static constexpr auto LIB_MODULES_PREFIX = "/lib/modules/";
+        dirent** kernel_dirs = NULL;
+
+        int n = scandir(LIB_MODULES_PREFIX, &kernel_dirs, KernelVersionNameFilter, NULL);
+        if (n == -1) {
+            PLOG(ERROR) << "Failed to scan dir " << LIB_MODULES_PREFIX;
+            return EXIT_FAILURE;
+        } else if (n > 0) {
+            while (n--) {
+                mod_dirs.emplace_back(LIB_MODULES_PREFIX + std::string(kernel_dirs[n]->d_name));
+            }
+        }
+        free(kernel_dirs);
+
+        // Allow modules to be directly inside /lib/modules
+        mod_dirs.emplace_back(LIB_MODULES_PREFIX);
     }
 
     LOG(DEBUG) << "mode is " << mode;
@@ -212,11 +245,6 @@
             return EXIT_FAILURE;
         }
     }
-    if (mod_dirs.empty()) {
-        LOG(ERROR) << "No module configuration directories given.";
-        print_usage();
-        return EXIT_FAILURE;
-    }
     if (parameter_count && modules.size() > 1) {
         LOG(ERROR) << "Only one module may be loaded when specifying module parameters.";
         print_usage();