diff --git a/gdbstub/user.c b/gdbstub/user.c
index 14918d1a21..3ce20b7bbf 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -356,16 +356,27 @@ int gdbserver_start(const char *port_or_path)
     return -1;
 }
 
+static void disable_gdbstub(CPUState *thread_cpu)
+{
+    CPUState *cpu;
+
+    close(gdbserver_user_state.fd);
+    gdbserver_user_state.fd = -1;
+    CPU_FOREACH(cpu) {
+        cpu_breakpoint_remove_all(cpu, BP_GDB);
+        /* no cpu_watchpoint_remove_all for user-mode */
+        cpu_single_step(cpu, 0);
+    }
+    tb_flush(thread_cpu);
+}
+
 /* Disable gdb stub for child processes.  */
 void gdbserver_fork(CPUState *cpu)
 {
     if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
         return;
     }
-    close(gdbserver_user_state.fd);
-    gdbserver_user_state.fd = -1;
-    cpu_breakpoint_remove_all(cpu, BP_GDB);
-    /* no cpu_watchpoint_remove_all for user-mode */
+    disable_gdbstub(cpu);
 }
 
 /*