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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