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Date: Wed, 2 Jun 2021 13:52:06 +0200
From: Arnd Bergmann <arnd@...db.de>
To: "# 3.4.x" <stable@...r.kernel.org>
Cc: Michael Weiser <michael.weiser@....de>, Martin Vajnar <martin.vajnar@...il.com>,
musl@...ts.openwall.com, Will Deacon <will.deacon@....com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] [stable v4.1] arm64: Remove unimplemented syscall
log message
On Wed, Jun 2, 2021 at 1:48 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Michael Weiser <michael.weiser@....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.
Nevermind, I forgot the 4.1.y line had ended. The 4.4 version is still needed
though, and also applies to 4.9.
Arnd
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