From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6302715D5D9 for ; Sat, 19 Oct 2024 09:16:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729329389; cv=none; b=k3g+stmHtWgdf0ADuiQ92e7yhZkG/qlWKExL38srGS5RavfV+ZSKuWYutFZdu5ShLfZA+CqbDkl38twAeTstN5nZUsyfZ5rLoBmsudI+Fy5a7KimVYaixRl12eA9aREnbqSa9INd23tHkPxX8LjLZWgnnPk031RsnTGl+3WLIyI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729329389; c=relaxed/simple; bh=qQJYRNBRWARANC/FRWT79sJmBoBlsImvtB5xJdBCNrE=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=Rd9++6/7QSFdW4nUBtm1BQc6BdQx4B6m/UzeHcHaCfeBpkWTP8xK0F6RxkxxWBJSIAKwgA4B+4FVwi0zLAlBPSHPy0DL6R1CC2Kw4hFUyA2xQkRYMSuCJoEgaNuvAGFPAeoqFBqUvLAHuYGvqW8C/bhCPX2MNPGWPx8X1tze5C4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TSiXFP9j; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TSiXFP9j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEF71C4CEC5; Sat, 19 Oct 2024 09:16:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729329389; bh=qQJYRNBRWARANC/FRWT79sJmBoBlsImvtB5xJdBCNrE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=TSiXFP9jyd+mq6Hr1ebmYNmZPZh6htB8UZ6r5pMvd7ehJ7hbkwmdtTA5YhYOce81Z S6fG/n7Iq6LzKhJu4o3RFLkoStKZlP91wvu0g6ZVfR7J14uvbRx4c8swNeGrxWsQN1 AyXXpu34oBgrrgXzwl3QrIGVVPP7Vq7SABqgZV/V7Cp2Y/hlVG9no0jZNUEEKxC5TL MDWRBUwvNsLRlCozZkxmjS4fMP397MccV/2rdJso0oJG/h4ZkcdX1NME4YpOLaV7ro LQaG5TZl35uljEKeZjcP3NWId8R021xm+hifybiSEfdYsxkTfXbrXOZmm3tF/v0wvo oB8nYTQ4jhNuw== Received: from sofa.misterjones.org ([185.219.108.64] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1t25ZS-004zTb-OB; Sat, 19 Oct 2024 10:16:26 +0100 Date: Sat, 19 Oct 2024 10:16:26 +0100 Message-ID: <87y12ktpud.wl-maz@kernel.org> From: Marc Zyngier To: Oliver Upton Cc: kvmarm@lists.linux.dev, Joey Gouly , Suzuki K Poulose , Zenghui Yu Subject: Re: [PATCH 0/2] KVM: arm64: Fix splat/misbehavior for MMIO SEA injection In-Reply-To: <20241018194757.3685856-1-oliver.upton@linux.dev> References: <20241018194757.3685856-1-oliver.upton@linux.dev> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: oliver.upton@linux.dev, kvmarm@lists.linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Fri, 18 Oct 2024 20:47:55 +0100, Oliver Upton wrote: > > syzkaller continues to find more interesting bugs, this time due to a > decently-sized hole in our UAPI. > > Turns out we still go through the motions of completing MMIO emulation > even if userspace has pended a *synchronous* external abort in response > to an unexpected access. Oops! > > In addition to the fix, I felt this warranted a selftest because a > documented UAPI flow has been broken for a while. Indeed. A good indication that nobody is using it. > Marc, I'll probably take this in 6.13 since we've still got quite a bit > outstanding for 6.12 and this isn't *terribly* urgent. Agreed. And the current set of fixes is not going anywhere at the moment. I may have to resort to an alternative routing for that. Thanks, M. -- Without deviation from the norm, progress is not possible.