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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5476C433EF for ; Mon, 6 Jun 2022 06:54:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230183AbiFFGye (ORCPT ); Mon, 6 Jun 2022 02:54:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230178AbiFFGyc (ORCPT ); Mon, 6 Jun 2022 02:54:32 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10DB3DEE81 for ; Sun, 5 Jun 2022 23:54:28 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7A32C61013 for ; Mon, 6 Jun 2022 06:54:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CF46C385A9; Mon, 6 Jun 2022 06:54:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654498466; bh=dhQoQdgKA49X2AKycbhy5EAOmiLDZjuwQaFKCuY/c14=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=x2BRRjFHOBRuoBmu05cHhMxIHCZ+LrSKqeX8t2UqquzaNUWiUIUuqwfAfRNY/35OY okDA2OFFTrJqCZUwhwEbuCkQykZ/4oAJxUDfJ51p20BYipf3V5YiuFWV27y/3bPKm7 kjgyl/kNRStcRSpFaeNgJHcVrNvet1gBJHeZRqgM= Date: Mon, 6 Jun 2022 08:54:23 +0200 From: Greg KH To: "Jason A. Donenfeld" Cc: stable@vger.kernel.org Subject: Re: [PATCH stable 5.10 5.15 5.17 5.18] arm64: Initialize jump labels before setup_machine_fdt() Message-ID: References: <20220604062503.396762-1-Jason@zx2c4.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220604062503.396762-1-Jason@zx2c4.com> Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Sat, Jun 04, 2022 at 08:25:03AM +0200, Jason A. Donenfeld wrote: > From: Stephen Boyd > > commit 73e2d827a501d48dceeb5b9b267a4cd283d6b1ae upstream. > > A static key warning splat appears during early boot on arm64 systems > that credit randomness from devicetrees that contain an "rng-seed" > property. This is because setup_machine_fdt() is called before > jump_label_init() during setup_arch(). Let's swap the order of these two > calls so that jump labels are initialized before the devicetree is > unflattened and the rng seed is credited. > > static_key_enable_cpuslocked(): static key '0xffffffe51c6fcfc0' used before call to jump_label_init() > WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:166 static_key_enable_cpuslocked+0xb0/0xb8 > Modules linked in: > CPU: 0 PID: 0 Comm: swapper Not tainted 5.18.0+ #224 44b43e377bfc84bc99bb5ab885ff694984ee09ff > pstate: 600001c9 (nZCv dAIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : static_key_enable_cpuslocked+0xb0/0xb8 > lr : static_key_enable_cpuslocked+0xb0/0xb8 > sp : ffffffe51c393cf0 > x29: ffffffe51c393cf0 x28: 000000008185054c x27: 00000000f1042f10 > x26: 0000000000000000 x25: 00000000f10302b2 x24: 0000002513200000 > x23: 0000002513200000 x22: ffffffe51c1c9000 x21: fffffffdfdc00000 > x20: ffffffe51c2f0831 x19: ffffffe51c6fcfc0 x18: 00000000ffff1020 > x17: 00000000e1e2ac90 x16: 00000000000000e0 x15: ffffffe51b710708 > x14: 0000000000000066 x13: 0000000000000018 x12: 0000000000000000 > x11: 0000000000000000 x10: 00000000ffffffff x9 : 0000000000000000 > x8 : 0000000000000000 x7 : 61632065726f6665 x6 : 6220646573752027 > x5 : ffffffe51c641d25 x4 : ffffffe51c13142c x3 : ffff0a00ffffff05 > x2 : 40000000ffffe003 x1 : 00000000000001c0 x0 : 0000000000000065 > Call trace: > static_key_enable_cpuslocked+0xb0/0xb8 > static_key_enable+0x2c/0x40 > crng_set_ready+0x24/0x30 > execute_in_process_context+0x80/0x90 > _credit_init_bits+0x100/0x154 > add_bootloader_randomness+0x64/0x78 > early_init_dt_scan_chosen+0x140/0x184 > early_init_dt_scan_nodes+0x28/0x4c > early_init_dt_scan+0x40/0x44 > setup_machine_fdt+0x7c/0x120 > setup_arch+0x74/0x1d8 > start_kernel+0x84/0x44c > __primary_switched+0xc0/0xc8 > ---[ end trace 0000000000000000 ]--- > random: crng init done > Machine model: Google Lazor (rev1 - 2) with LTE > > Cc: Hsin-Yi Wang > Cc: Douglas Anderson > Cc: Ard Biesheuvel > Cc: Steven Rostedt > Cc: Jason A. Donenfeld > Cc: Dominik Brodowski > Fixes: f5bda35fba61 ("random: use static branch for crng_ready()") > Signed-off-by: Stephen Boyd > Reviewed-by: Jason A. Donenfeld > Link: https://lore.kernel.org/r/20220602022109.780348-1-swboyd@chromium.org > Signed-off-by: Catalin Marinas > Signed-off-by: Jason A. Donenfeld > --- > This got a "Fixes:" tag, but didn't have a corresponding Cc to stable. > Presumably AUTOSEL will eventually find this too, but sending it onward > proactively anyway. Now queued up, thanks. greg k-h