diff --git a/fs/io_uring.c b/fs/io_uring.c
index 8a2b73c..c4f2176 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6196,6 +6196,9 @@
 	if (get_timespec64(&data->ts, u64_to_user_ptr(sqe->addr)))
 		return -EFAULT;
 
+	if (data->ts.tv_sec < 0 || data->ts.tv_nsec < 0)
+		return -EINVAL;
+
 	data->mode = io_translate_timeout_mode(flags);
 	hrtimer_init(&data->timer, io_timeout_get_clock(data), data->mode);