1 files changed, 4 insertions, 2 deletions
diff --git a/src/core/iomgr/fd_posix.c b/src/core/iomgr/fd_posix.c
index 63615ea25f..b697fcc64a 100644
--- a/src/core/iomgr/fd_posix.c
+++ b/src/core/iomgr/fd_posix.c
@@ -165,7 +165,7 @@ static void maybe_wake_one_watcher(grpc_fd *fd) {
   gpr_mu_unlock(&fd->watcher_mu);
 }
 
-static void wake_all_watchers(grpc_fd *fd) {
+static void wake_all_watchers_locked(grpc_fd *fd) {
   grpc_fd_watcher *watcher;
   for (watcher = fd->inactive_watcher_root.next;
        watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
@@ -184,7 +184,9 @@ void grpc_fd_orphan(grpc_fd *fd, grpc_iomgr_cb_func on_done, void *user_data) {
   fd->on_done_user_data = user_data;
   shutdown(fd->fd, SHUT_RDWR);
   ref_by(fd, 1); /* remove active status, but keep referenced */
-  wake_all_watchers(fd);
+  gpr_mu_lock(&fd->watcher_mu);
+  wake_all_watchers_locked(fd);
+  gpr_mu_unlock(&fd->watcher_mu);
   unref_by(fd, 2); /* drop the reference */
 }