io_uring: validate timespec for timeout removals

Like commit f6223ff79966, timeout removal should also validate the
timespec that is being passed in.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Link: https://lore.kernel.org/r/20211129041537.1936270-1-yebin10@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 08b1b3d..8b6bfed 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6111,6 +6111,8 @@ static int io_timeout_remove_prep(struct io_kiocb *req,
                        return -EINVAL;
                if (get_timespec64(&tr->ts, u64_to_user_ptr(sqe->addr2)))
                        return -EFAULT;
+               if (tr->ts.tv_sec < 0 || tr->ts.tv_nsec < 0)
+                       return -EINVAL;
        } else if (tr->flags) {
                /* timeout removal doesn't support flags */
                return -EINVAL;