From: Jann Horn <[email protected]>
To: Jens Axboe <[email protected]>
Cc: Jiufei Xue <[email protected]>,
io-uring <[email protected]>,
stable <[email protected]>
Subject: missing backport markings on security fix [was: [PATCH] io_uring: set table->files[i] to NULL when io_sqe_file_register failed]
Date: Wed, 2 Sep 2020 17:07:14 +0200 [thread overview]
Message-ID: <CAG48ez1MLMDPLA28HhRLcp+skk8KBawMq7qLv91kNY_prkZ4uw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
On Wed, Sep 2, 2020 at 4:49 PM Jens Axboe <[email protected]> wrote:
> On 9/2/20 3:59 AM, Jiufei Xue wrote:
> > While io_sqe_file_register() failed in __io_sqe_files_update(),
> > table->files[i] still point to the original file which may freed
> > soon, and that will trigger use-after-free problems.
>
> Applied, thanks.
Shouldn't this have a CC stable tag and a fixes tag on it? AFAICS this
is a fix for a UAF that exists since
f3bd9dae3708a0ff6b067e766073ffeb853301f9 ("io_uring: fix memleak in
__io_sqe_files_update()"), and that commit was marked for stable
backporting back to when c3a31e605620 landed, and that commit was
introduced in Linux 5.5.
You can see at <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/fs/io_uring.c?h=linux-5.8.y#n6933>
that this security vulnerability currently exists in the stable 5.8
branch.
next prev parent reply other threads:[~2020-09-02 15:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-02 9:59 [PATCH] io_uring: set table->files[i] to NULL when io_sqe_file_register failed Jiufei Xue
2020-09-02 14:12 ` Jens Axboe
2020-09-02 15:07 ` Jann Horn [this message]
2020-09-02 15:11 ` missing backport markings on security fix [was: [PATCH] io_uring: set table->files[i] to NULL when io_sqe_file_register failed] Jens Axboe
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=CAG48ez1MLMDPLA28HhRLcp+skk8KBawMq7qLv91kNY_prkZ4uw@mail.gmail.com \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/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