From: Christian Brauner <christian.brauner@ubuntu.com>
To: Amanieu d'Antras <amanieu@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Christian Brauner <christian@brauner.io>,
stable@vger.kernel.org
Subject: Re: [PATCH 0/7] Fix CLONE_SETTLS with clone3
Date: Tue, 7 Jan 2020 13:34:35 +0100 [thread overview]
Message-ID: <20200107123434.vxfq57oah34plvjx@wittgenstein> (raw)
In-Reply-To: <20200102172413.654385-1-amanieu@gmail.com>
On Thu, Jan 02, 2020 at 06:24:06PM +0100, Amanieu d'Antras wrote:
> The clone3 syscall is currently broken when used with CLONE_SETTLS on all
> architectures that don't have an implementation of copy_thread_tls. The old
> copy_thread function handles CLONE_SETTLS by reading the new TLS value from
> pt_regs containing the clone syscall parameters. Since clone3 passes the TLS
> value in clone_args, this results in the TLS register being initialized to a
> garbage value.
>
> This patch series implements copy_thread_tls on all architectures that currently
> define __ARCH_WANT_SYS_CLONE3 and adds a compile-time check to ensure that any
> architecture that enables clone3 in the future also implements copy_thread_tls.
>
> I have also included a minor fix for the arm64 uapi headers which caused
> __NR_clone3 to be missing from the exported user headers.
>
> I have only tested this on arm64, but the copy_thread_tls implementations for
> the various architectures are fairly straightforward.
I've picked up this series and moved it into
https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=clone3_tls
If I hear no objections I'll merge into into my fixes tree today or
tomorrow.
Thanks!
Christian
prev parent reply other threads:[~2020-01-07 12:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-02 17:24 [PATCH 0/7] Fix CLONE_SETTLS with clone3 Amanieu d'Antras
2020-01-02 17:24 ` [PATCH 1/7] arm64: Move __ARCH_WANT_SYS_CLONE3 definition to uapi headers Amanieu d'Antras
2020-01-02 17:50 ` Christian Brauner
2020-01-02 19:25 ` Arnd Bergmann
2020-01-02 19:32 ` Amanieu d'Antras
2020-01-02 19:59 ` Arnd Bergmann
2020-01-02 17:24 ` [PATCH 2/7] arm64: Implement copy_thread_tls Amanieu d'Antras
2020-01-02 18:01 ` Christian Brauner
2020-01-06 17:39 ` Will Deacon
2020-01-06 18:03 ` Amanieu d'Antras
2020-01-07 9:02 ` Christian Brauner
2020-01-07 17:45 ` Will Deacon
2020-01-07 18:12 ` Kees Cook
2020-01-07 19:30 ` Christian Brauner
2020-01-07 19:30 ` Christian Brauner
2020-01-02 17:24 ` [PATCH 3/7] arm: " Amanieu d'Antras
2020-01-02 18:02 ` Christian Brauner
2020-01-02 17:24 ` [PATCH 4/7] parisc: " Amanieu d'Antras
2020-01-02 17:24 ` [PATCH 5/7] riscv: " Amanieu d'Antras
2020-01-02 17:24 ` [PATCH 6/7] xtensa: " Amanieu d'Antras
2020-01-02 17:24 ` [PATCH 7/7] clone3: ensure copy_thread_tls is implemented Amanieu d'Antras
2020-01-02 18:09 ` Christian Brauner
2020-01-02 18:19 ` Amanieu d'Antras
2020-01-02 18:24 ` Christian Brauner
2020-01-02 18:11 ` [PATCH 0/7] Fix CLONE_SETTLS with clone3 Christian Brauner
2020-01-04 12:39 ` [PATCH] um: Implement copy_thread_tls Amanieu d'Antras
2020-01-05 15:19 ` Christian Brauner
2020-01-07 12:35 ` Christian Brauner
2020-01-17 0:12 ` Richard Weinberger
2020-01-17 0:14 ` Christian Brauner
2020-01-07 12:34 ` Christian Brauner [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 \
--in-reply-to=20200107123434.vxfq57oah34plvjx@wittgenstein \
--to=christian.brauner@ubuntu.com \
--cc=amanieu@gmail.com \
--cc=christian@brauner.io \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
/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).