From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F2C09C02194 for ; Thu, 6 Feb 2025 13:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=4uZIGtb+7KOrX+sckynNBFkeDyesfoZy0qxCDoajkHk=; b=wjYirbMK+kjuqGo5ZqOCtvcWjz WvgrTdq3/NJWTjCsm11W/2BXci4qABa2GMhdW5aw1nWsZX66lKAoGyuNoeG5LKQSROEgwfqvWArWR ilmBNT/iIRnnQrl3p468IzXNeRyv5tNpOaNZcWaO83GqHunZbUkFlDpehKv9WeTX81n9OU2spk5bs p42LogJu4pV5rikA7XMmlbrL1sOLZFDJ5pptwZ+4AV26mXYquvPGOR6Y1S2vy1o9eu0Xhn24fgjPv eJFjiAkcL7A8MHJyl4aTZjYoPApIyEIicO6IuQzZQzytxzzss3o80IMCC2qx5Udd2/GIH8edT2lTI sc33itzg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tg1mD-00000006OL4-0dzl; Thu, 06 Feb 2025 13:18:41 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tg1cR-00000006M4E-2CaR for linux-arm-kernel@lists.infradead.org; Thu, 06 Feb 2025 13:08:36 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id D7B91A44241; Thu, 6 Feb 2025 13:06:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6B1EC4CEE2; Thu, 6 Feb 2025 13:08:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738847314; bh=dB2sXvFCFazjgPHF18eVuHRPrx9FXxAUTOD4xzJxjjY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jwx5N4iUWHTc4s6JspVIkAaCvQTOUAsQAdcmd288qqCgafkBfkUD75H2++2MPWorM ohin+gVLUH7JGtLF3XgaqW/gA1bIItyjRbgT36dq2GT1Ooc4F57TCnxLvm/h1583YQ +Gnt+yQ221CZPGhR4jzQGfzJdSNk8WXEuBg9hYTD+vwqWRH/0uycVCM7x/mRBXtCe0 llo4Y/tfH9/P/yX2mXrxjWEriFmbtV6/jDo3IAxekflsUKxzHXPvWWHmq4ZRIsGd64 LwlwKeJXphNlYbZmwR6tr6VJLXcpwGCeehrI1U9snoFMQDQUwy7YlJNNZn8zjZDE6W 9efLhCnOSk1+Q== Date: Thu, 6 Feb 2025 13:08:30 +0000 From: Will Deacon To: Emanuele Rocca Cc: linux-arm-kernel@lists.infradead.org, Mark Rutland Subject: Re: [BUG] ARM64 regression: NULL pointer dereference in arm_smccc_version_init+0x90/0x1ac Message-ID: <20250206130829.GC3204@willie-the-truck> References: <20250130114332.GA28662@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250206_050835_626225_6C7C8AAE X-CRM114-Status: GOOD ( 16.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Feb 05, 2025 at 11:35:18AM +0100, Emanuele Rocca wrote: > On 2025-01-30 11:43, Will Deacon wrote: > > On Fri, Jan 24, 2025 at 03:52:10PM +0100, Emanuele Rocca wrote: > > > This is with kernel 6.1.123. The last known good kernel I have available right > > > now is 6.1.119. In the 6.1.120 changelog I see the following commit which seems > > > potentially related? > > > > > > https://lore.kernel.org/all/20241106160448.2712997-1-mark.rutland@arm.com/ > > > > > > That's stable commit [1]. > > > > I can't see anything wrong with that patch but if you have reason to > > suspect that it's broken can you try reverting it to see if the problem > > disappears? > > Confirmed: reverting the patch fixes the issue. I guess that's just a happy accident thanks to the clobber list changing on the smc asm with the sve check. Will