From: "zhangyi (F)" <yi.zhang@huawei.com>
To: <linux-aio@kvack.org>, <linux-fsdevel@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <bcrl@kvack.org>, <viro@zeniv.linux.org.uk>,
<yi.zhang@huawei.com>, <wangkefeng.wang@huawei.com>
Subject: [PATCH] aio: add timeout validity check for io_[p]getevents
Date: Thu, 25 Jul 2019 15:21:29 +0800 [thread overview]
Message-ID: <1564039289-7672-1-git-send-email-yi.zhang@huawei.com> (raw)
io_[p]getevents syscall should return -EINVAL if if timeout is out of
range, add this validity check.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
---
fs/aio.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index 01e0fb9..dd967a0 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -2031,10 +2031,17 @@ static long do_io_getevents(aio_context_t ctx_id,
struct io_event __user *events,
struct timespec64 *ts)
{
- ktime_t until = ts ? timespec64_to_ktime(*ts) : KTIME_MAX;
- struct kioctx *ioctx = lookup_ioctx(ctx_id);
+ ktime_t until = KTIME_MAX;
+ struct kioctx *ioctx = NULL;
long ret = -EINVAL;
+ if (ts) {
+ if (!timespec64_valid(ts))
+ return ret;
+ until = timespec64_to_ktime(*ts);
+ }
+
+ ioctx = lookup_ioctx(ctx_id);
if (likely(ioctx)) {
if (likely(min_nr <= nr && min_nr >= 0))
ret = read_events(ioctx, min_nr, nr, events, until);
--
2.7.4
next reply other threads:[~2019-07-25 7:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-25 7:21 zhangyi (F) [this message]
2019-07-25 14:43 ` [PATCH] aio: add timeout validity check for io_[p]getevents Jeff Moyer
2019-07-29 14:57 ` Jeff Moyer
2019-07-29 15:47 ` Al Viro
2019-07-29 15:59 ` Jeff Moyer
2019-07-30 1:28 ` zhangyi (F)
2020-03-09 1:39 ` zhangyi (F)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1564039289-7672-1-git-send-email-yi.zhang@huawei.com \
--to=yi.zhang@huawei.com \
--cc=bcrl@kvack.org \
--cc=linux-aio@kvack.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
--cc=wangkefeng.wang@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).