Fix a race where an fd can be deleted during polling
diff --git a/src/core/iomgr/fd_posix.c b/src/core/iomgr/fd_posix.c
index e3571e8..4f52339 100644
--- a/src/core/iomgr/fd_posix.c
+++ b/src/core/iomgr/fd_posix.c
@@ -295,6 +295,8 @@
grpc_fd_watcher *watcher) {
/* keep track of pollers that have requested our events, in case they change
*/
+ grpc_fd_ref(fd);
+
gpr_mu_lock(&fd->watcher_mu);
watcher->next = &fd->watcher_root;
watcher->prev = watcher->next->prev;
@@ -312,6 +314,8 @@
watcher->next->prev = watcher->prev;
watcher->prev->next = watcher->next;
gpr_mu_unlock(&watcher->fd->watcher_mu);
+
+ grpc_fd_unref(watcher->fd);
}
void grpc_fd_become_readable(grpc_fd *fd, int allow_synchronous_callback) {