From: Jens Axboe <[email protected]>
To: Eric Biggers <[email protected]>,
Pavel Begunkov <[email protected]>,
[email protected]
Cc: 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 19:17:25 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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.
--
Jens Axboe
next prev parent reply other threads:[~2023-01-13 2:17 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 [this message]
2023-01-13 2:26 ` Eric Biggers
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