public inbox for [email protected]
 help / color / mirror / Atom feed
From: Eric Biggers <[email protected]>
To: Jens Axboe <[email protected]>
Cc: Pavel Begunkov <[email protected]>,
	[email protected],
	syzbot <[email protected]>,
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected]
Subject: Re: [io_uring] KASAN: use-after-free Read in signalfd_cleanup
Date: Thu, 12 Jan 2023 18:26:04 -0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On Thu, Jan 12, 2023 at 07:17:25PM -0700, Jens Axboe wrote:
> On 1/12/23 7:12 PM, Eric Biggers wrote:
> > Over to the io_uring maintainers and list, based on the reproducer...:
> > 
> >     r0 = signalfd4(0xffffffffffffffff, &(0x7f00000000c0), 0x8, 0x0)
> >     r1 = syz_io_uring_setup(0x87, &(0x7f0000000180), &(0x7f0000ffc000/0x3000)=nil, &(0x7f00006d4000/0x1000)=nil, &(0x7f0000000000)=<r2=>0x0, &(0x7f0000000040)=<r3=>0x0)
> >     pipe(&(0x7f0000000080)={0xffffffffffffffff, <r4=>0xffffffffffffffff})
> >     write$binfmt_misc(r4, &(0x7f0000000000)=ANY=[], 0xfffffecc)
> >     syz_io_uring_submit(r2, r3, &(0x7f0000002240)=@IORING_OP_POLL_ADD={0x6, 0x0, 0x0, @fd=r0}, 0x0)
> >     io_uring_enter(r1, 0x450c, 0x0, 0x0, 0x0, 0x0)
> 
> This was a buggy patch in a branch, already updated and can be discarded.
> 

Then let's do:

#syz invalid

      reply	other threads:[~2023-01-13  2:26 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <[email protected]>
     [not found] ` <[email protected]>
2023-01-13  2:12   ` [io_uring] KASAN: use-after-free Read in signalfd_cleanup Eric Biggers
2023-01-13  2:17     ` Jens Axboe
2023-01-13  2:26       ` Eric Biggers [this message]

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 \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [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