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 17E9331A7E2; Tue, 19 May 2026 15:23:57 +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=1779204238; cv=none; b=jea6fSBEWqqRp/D6vDJWrS7rjt5OFgM/GgefLvLgxpJmErktd+FmZ1RAhahfkbz1fhAn/sG82/FMafSkK/ui0DQl3CfjQB1jh8PErX2OR5jgEhfzxtlaNJuoBl4ACNYB5A61uMdpEaqJN83pAJGHTvLFwLlv+8KMkxfy5VVlgzA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779204238; c=relaxed/simple; bh=I+IjMYlDv1l4GPKm44lgcCi3BwfRmTlX+eKtPHhhqsw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=d3Dd595XDXzPDjEdSQFZu3aSqdXFyxMR4XxmAUD0t6nLFNt75ZMXbl1fpjx7xC5r7euysmkUiIQN1OzGr+YUIWhqVuzRx86FXZnpQrUmF59gprSUSp/x7fcQOV5U0q5X2F1rO3WLoPsAa3AVkDt/o9+oaGR8juVh4vjdCM5JFsc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KYZnYUNq; 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="KYZnYUNq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39324C2BCB3; Tue, 19 May 2026 15:23:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779204237; bh=I+IjMYlDv1l4GPKm44lgcCi3BwfRmTlX+eKtPHhhqsw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KYZnYUNq9Tu1sJ42jVFYrVmNjc4OMw6j4rHkWc8RCHgSKRCcftXwoeNUIWSz9+OS0 r0c02nrsnqNc6/JQjsTHsaeU37UrpfA8nClHDw5XOtuH5Kvf56lKMLFliBfQlkLWRY rOnOly7/E/NAF2d3srHRek71+aoEYVHDdMQWp6krJsvzXg66vIfvRxx5RA6asbk2CJ cGHQ0O/3wJY3ev9zpJ5G2P4UdLdtdWLML8qCUsnXmR/PIxXpQ740UUg7yaVjVlgxjm OEkCYc8tl/MiNQl1JgFj77G3Ko+KFlK1zIH03Olc8YqjhtuFhozw9FJ7ZutA73ebha sEYUKk1vNmAWQ== From: Will Deacon To: linux-arm-kernel@lists.infradead.org, Kevin Brodsky Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , Andrew Morton , "David Hildenbrand (Arm)" , Joey Gouly , Mark Brown , Shuah Khan , linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 0/5] POE sigreturn fix and extra tests Date: Tue, 19 May 2026 16:23:00 +0100 Message-ID: <177918804505.746149.6023931077901684027.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260427-poe_signal-v2-0-2bd9d6f16ab4@arm.com> References: <20260427-poe_signal-v2-0-2bd9d6f16ab4@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit On Mon, 27 Apr 2026 13:03:32 +0100, Kevin Brodsky wrote: > Commit 2e8a1acea859 ("arm64: signal: Improve POR_EL0 handling to > avoid uaccess failures") introduced special handling for EL0 registers > that impact uaccess. This did not however handle the case where a signal > handler removes the relevant record (poe_context for POE) from the > signal frame; this is clearly not typical behaviour but it is legal. > That commit resulted in arbitrary data from the kernel stack being > written to POR_EL0 in that case. > > [...] Applied selftest updates to arm64 (for-next/selftests), thanks! [2/5] selftests/mm: Fix resv_sz when parsing arm64 signal frame https://git.kernel.org/arm64/c/c364aa56d673 [3/5] kselftest/arm64: Add POE as a feature in the signal tests https://git.kernel.org/arm64/c/42c21954063e [4/5] kselftest/arm64: Move/add POE helpers to test_signals_utils.h https://git.kernel.org/arm64/c/925a082ec2a0 [5/5] kselftest/arm64: Add tests for POR_EL0 save/reset/restore https://git.kernel.org/arm64/c/f2db075234c8 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev