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: 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 17:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-02 11:46 [PATCH] [stable v4.4] arm64: Remove unimplemented syscall log message 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.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.