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 44130C02194 for ; Wed, 5 Feb 2025 10:37:19 +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=RBcGZMP/PH344JaTxjrnS3tu/upG2EbrbigBh0oEiOY=; b=4NLT6e/cPp4tiKnwkd9mIKht70 Q2Zw580etigZTVv4NLhN/81sDAfAmIiZT10f5XTciPR9uHGvJtoim4TlTea0OFF18LbH5RJClRlkX ygaCdVAvGuXzemDNFQ+ZQXNMW1zjgxS8bdYK50iFQNq0KQB+Bgauk9yUtcgbmigCk/mM6FnF6Cm6R ZrtNGGH2EDAxaWCb0RV6FPKrWO0zFs12Sfp/AYExALoZbMNwUT97dCD5weTn87Kxt3r1iioFBvP2Y K3RWIbpfuGdctzNXo0ms1vbTkB7cJjiCD3dE3B1jSdEFMShSY5QNkqgtI8IIjJOgrZPS55LgleYzU WYWXeqdw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tfcmI-00000002uAa-0oic; Wed, 05 Feb 2025 10:37:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tfckv-00000002u03-1bWb for linux-arm-kernel@lists.infradead.org; Wed, 05 Feb 2025 10:35:42 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BB31F1C01; Wed, 5 Feb 2025 02:35:57 -0800 (PST) Received: from NH27D9T0LF (unknown [10.57.9.241]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 418663F5A1; Wed, 5 Feb 2025 02:35:33 -0800 (PST) Date: Wed, 5 Feb 2025 11:35:18 +0100 From: Emanuele Rocca To: Will Deacon 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: References: <20250130114332.GA28662@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250130114332.GA28662@willie-the-truck> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250205_023541_495058_25C30880 X-CRM114-Status: GOOD ( 13.59 ) 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 Hello Will and Mark, 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.