diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5b3fce3..e387246 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -11875,7 +11875,9 @@
     case TARGET_NR_clock_nanosleep:
     {
         struct timespec ts;
-        target_to_host_timespec(&ts, arg3);
+        if (target_to_host_timespec(&ts, arg3)) {
+            return -TARGET_EFAULT;
+        }
         ret = get_errno(safe_clock_nanosleep(arg1, arg2,
                                              &ts, arg4 ? &ts : NULL));
         /*
@@ -11883,8 +11885,9 @@
          * with error -TARGET_EINTR and if arg4 is not NULL and arg2 is not
          * TIMER_ABSTIME, it returns the remaining unslept time in arg4.
          */
-        if (ret == -TARGET_EINTR && arg4 && arg2 != TIMER_ABSTIME) {
-            host_to_target_timespec(arg4, &ts);
+        if (ret == -TARGET_EINTR && arg4 && arg2 != TIMER_ABSTIME &&
+            host_to_target_timespec(arg4, &ts)) {
+              return -TARGET_EFAULT;
         }
 
         return ret;