From: Ye Bin <yebin10@huawei.com>
Date: Mon, 29 Nov 2021 04:15:37 +0000 (+0800)
Subject: io_uring: validate timespec for timeout removals
X-Git-Tag: v6.1-rc5~2254^2~20
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2087009c74d41ab8579f08157bca55b7d0857ee5;p=platform%2Fkernel%2Flinux-starfive.git

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
--- 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;