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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 72474C48BEB for ; Wed, 21 Feb 2024 19:20:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CD5E66B0075; Wed, 21 Feb 2024 14:20:23 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C86796B007B; Wed, 21 Feb 2024 14:20:23 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B4F066B007E; Wed, 21 Feb 2024 14:20:23 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id A47616B0075 for ; Wed, 21 Feb 2024 14:20:23 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 792011C01CF for ; Wed, 21 Feb 2024 19:20:23 +0000 (UTC) X-FDA: 81816777126.17.F71CCE8 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf05.hostedemail.com (Postfix) with ESMTP id BCDA310000B for ; Wed, 21 Feb 2024 19:20:21 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fM7bxuzf; spf=pass (imf05.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=broonie@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1708543221; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=RkBIvhKoE5A92yW0y/HwydSwX4MVkrST6eOJEZhn7jU=; b=CfnQKhMEl5r2FXdqqW8eEaxjAQOd4MVx4e/AsfAXQTT5C/4lvadYGLD9FM+I31ulABKTXS PUh5EXPb36zLb1G8Afm+ENqCw76MMrqXvNbxZLUyVYx+wVdMYYkw5W4juvTb0VEyfvqwpc pUcpklGVvehg2ZAlq4XMV50zWRebueU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1708543221; a=rsa-sha256; cv=none; b=itWRNziuVUVCT64VjLKtu2PdH8JNjYC8TaF+u9JAZMQ8D65cIBUptxKmvRFffSUAJ2FVLb 30yM2QlDbPC3OyTkdUloL922rijbg5y2lqvDzfl02/wSg5KzxeNVygiPb5Kw67S1WQ04oO Uu/xbAaXnuU7ncy9WGlWAIgQEOYI0Zg= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fM7bxuzf; spf=pass (imf05.hostedemail.com: domain of broonie@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=broonie@kernel.org; dmarc=pass (policy=none) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id BD3CA60C5E; Wed, 21 Feb 2024 19:20:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5294CC433F1; Wed, 21 Feb 2024 19:20:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708543220; bh=LHJE1R6CeCVbz5voxdhxWZEEGGRoTCqvuitIhyGxW/Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fM7bxuzf37U7KgkBjE4t6xl7196zWQ3zUCNoJ+agd+QN1cy+Xyq7yQXJHO1ESLu+m WfRkNjkseH24zdDLgFE1SQHiWbwcIsKTde/kK/nypgvvdaArvLxpMbxTv/DpPdea0Y h/S2n8KTkPnE0y1deFIAUzbMSfmwY+RBO7FMARe9q8Qz3/FxPYnixoXp6/h5t4/vuP uoT778pZQf+ryGuzNashUCuvUxs+4C4xh9U2NIQYurkPfiYpJq05pv7AaQTTfFstDU 3dg2YeZnziQRTHuGFAV/FX2fhdlhfvtEv0Qil9L1OpaX49KYycDzgKOwtGXtT8v3X9 UMMPgrMEFWVIg== Date: Wed, 21 Feb 2024 19:20:11 +0000 From: Mark Brown To: Thiago Jung Bauermann Cc: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v8 33/38] kselftest/arm64: Add a GCS test program built with the system libc Message-ID: <084d97c0-a84c-49e1-a1e2-d864dbfcce0e@sirena.org.uk> References: <20240203-arm64-gcs-v8-0-c9fec77673ef@kernel.org> <20240203-arm64-gcs-v8-33-c9fec77673ef@kernel.org> <87sf1n7uea.fsf@linaro.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="2wtnap7o07IPW6JY" Content-Disposition: inline In-Reply-To: <87sf1n7uea.fsf@linaro.org> X-Cookie: The second best policy is dishonesty. X-Stat-Signature: pnp8snck94rfo6yj1uq5soyri1iybw3p X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: BCDA310000B X-Rspam-User: X-HE-Tag: 1708543221-561172 X-HE-Meta: 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 rSAtaSQ/ gMYQED2ieGpeXkKZIEYp11WkYFWhuF2qLFrKabQCp5iEnD3/hH6pbi9kOshIxOggprgtFfSmUpB1ibNZmN2MpGmRzNjTOM2xe7rSvrVHGWdOgCP/YaXNyW7pNaqo/zgRTAmoPA6lgu2HoJEAuLOJc7jJXfr6mzAeWEkQHeyw9bUDrYDZElrMOqBGvKYoWBn2qcnP5K6kpooqMx2nFe65ccPuGnw2CUgn6w3iiryBrjI6uhUAmDXV5k9R5bTeC8fKFn8auuysCXf0OHtB7aQVqTRTXpD8J69zz3raqZekUM5AlsdIMWQvnnMxMV4ad/R4CeOkn X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --2wtnap7o07IPW6JY Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Feb 19, 2024 at 11:15:57PM -0300, Thiago Jung Bauermann wrote: > The only issue as can be seen above is that the can_call_function test > is failing. The child is getting a GCS Segmentation fault when returning > from fork(). > I tried debugging it with GDB, but I don't see what's wrong since the > address in LR matches the first entry in GCSPR. Here is the > debug session: I'm simply not seeing this in my testing. There's *something* going on somewhere, I had another report of a similarish thing elsewhere, but not in any way that I've ever been able to reproduce. It smells like there might be something missing with the page tables... --2wtnap7o07IPW6JY Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmXWTOoACgkQJNaLcl1U h9BQigf/fQNxlJZgGDgIILMsKObHoXWsq3JdCPlraW9xJegPTEC5/TbR57O6F0Ds /m4Si6b75N7h1+TLJWetmyKnGAMNBss9qHx2swhi78CdwKsefp4GKaivaFWVKxRx srdyCavP5tHvbc4O2WqN4A8HZY2ekXKnaXvmz/1DtfvKpV5hgYKBo99ISPLrMVpC gX/jBaUd5GFOX6ImWBzN30pXfHRJXBr0DiXBrTlxoevDfu7GvQN4qECSqBxM2s1F Q0vvblI/SBO9CX3h1Pnbdr4VleVLI3arjc4YTBiaPY8cVjHyb1RkUeUrRWVXRzU8 pzYSSKqd4kQ61qa9FEiZhZs13o9otQ== =eqM2 -----END PGP SIGNATURE----- --2wtnap7o07IPW6JY--