--- a/base/threading/platform_thread_linux.cc
+++ b/base/threading/platform_thread_linux.cc
@@ -436,8 +436,13 @@
 
 size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
 #if !defined(THREAD_SANITIZER)
+#if defined(__GLIBC__)
   return 0;
 #else
+  // musl libcs default is too small, use 8mb like glibc
+  return (1 << 23);
+#endif
+#else
   // ThreadSanitizer bloats the stack heavily. Evidence has been that the
   // default stack size isn't enough for some browser tests.
   return 2 * (1 << 23);  // 2 times 8192K (the default stack size on Linux).
--- a/chrome/browser/shutdown_signal_handlers_posix.cc
+++ b/chrome/browser/shutdown_signal_handlers_posix.cc
@@ -188,11 +188,21 @@
   g_shutdown_pipe_read_fd = pipefd[0];
   g_shutdown_pipe_write_fd = pipefd[1];
 #if !defined(ADDRESS_SANITIZER)
+#if defined(__GLIBC__)
   const size_t kShutdownDetectorThreadStackSize = PTHREAD_STACK_MIN * 2;
 #else
+  // match up musls 2k PTHREAD_STACK_MIN with glibcs 16k
+  const size_t kShutdownDetectorThreadStackSize = PTHREAD_STACK_MIN * 2 * 8;
+#endif
+#else
   // ASan instrumentation bloats the stack frames, so we need to increase the
   // stack size to avoid hitting the guard page.
+#if defined(__GLIBC__)
   const size_t kShutdownDetectorThreadStackSize = PTHREAD_STACK_MIN * 4;
+#else
+  const size_t kShutdownDetectorThreadStackSize = PTHREAD_STACK_MIN * 4 * 8;
+  // match up musls 2k PTHREAD_STACK_MIN with glibcs 16k
+#endif
 #endif
   ShutdownDetector* detector = new ShutdownDetector(
       g_shutdown_pipe_read_fd, std::move(shutdown_callback), task_runner);