From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: stable@vger.kernel.org, Michael Weiser <michael.weiser@gmx.de>,
Martin Vajnar <martin.vajnar@gmail.com>,
musl@lists.openwall.com, Will Deacon <will.deacon@arm.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: [musl] Re: [PATCH] [stable v4.4] arm64: Remove unimplemented syscall log message
Date: Tue, 8 Jun 2021 19:06:53 +0200 [thread overview]
Message-ID: <YL+jrRKPCgoDtQ1r@kroah.com> (raw)
In-Reply-To: <20210602114651.423605-1-arnd@kernel.org>
On Wed, Jun 02, 2021 at 01:46:51PM +0200, Arnd Bergmann wrote:
> From: Michael Weiser <michael.weiser@gmx.de>
>
> commit 1962682d2b2fbe6cfa995a85c53c069fadda473e upstream.
>
> Stop printing a (ratelimited) kernel message for each instance of an
> unimplemented syscall being called. Userland making an unimplemented
> syscall is not necessarily misbehaviour and to be expected with a
> current userland running on an older kernel. Also, the current message
> looks scary to users but does not actually indicate a real problem nor
> help them narrow down the cause. Just rely on sys_ni_syscall() to return
> -ENOSYS.
>
> Cc: <stable@vger.kernel.org>
> Cc: Martin Vajnar <martin.vajnar@gmail.com>
> Cc: musl@lists.openwall.com
> Acked-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> This was backported to v4.14 and later, but is missing in v4.4 and
> before, apparently because of a trivial merge conflict. This is
> a manual backport I did after I saw a report about the issue
> by Martin Vajnar on the musl mailing list.
> ---
> arch/arm64/kernel/traps.c | 8 --------
> 1 file changed, 8 deletions(-)
Now queued up, thanks.
greg k-h
prev parent reply other threads:[~2021-06-08 17:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-02 11:46 [musl] " Arnd Bergmann
2021-06-08 17:06 ` Greg Kroah-Hartman [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=YL+jrRKPCgoDtQ1r@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=martin.vajnar@gmail.com \
--cc=michael.weiser@gmx.de \
--cc=musl@lists.openwall.com \
--cc=stable@vger.kernel.org \
--cc=will.deacon@arm.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.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
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).