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 02A981D9A5F for ; Tue, 15 Oct 2024 12:39:16 +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=1728995957; cv=none; b=koOKZFvG6fJmxhcKs34xpG+mKQ8iZ93A38HaZ0Yt2BFqUkt8BLyyS6IM6PMnqJPjOioYT9Hz1b+E/rdzUpC1LVJk4f0bcq0aNRychc7cqXVFvnhPMRMN+lldVH7GxZAnIah04x5X1MPSXsZmeRcVvxCP8enO/ewd3bc38hdYlgY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728995957; c=relaxed/simple; bh=e2QA9KcgtrJ8qw+0ksp2Ed9LkFKZ/Fnpb0ZXoxI/s5I=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=JVgQgm1uJTOaDehYhfAfWd431ScI1lfYparu9U4OUc0kMHVgiG1FjJMrMGJka50u2unPecjj7E5TEnO+3XhGERlqUzxo0rBpiZxiPkhvOPtdTDQoD5dVDmhY0fXbU5cTFO8GlsRRoJfL6A34as8JaB3Ke+Xn3Lpju7cvWJyKZ+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JwV3hPt4; 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="JwV3hPt4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 683A1C4CEC6; Tue, 15 Oct 2024 12:39:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728995956; bh=e2QA9KcgtrJ8qw+0ksp2Ed9LkFKZ/Fnpb0ZXoxI/s5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JwV3hPt4bT0YLluSmDGMDvgSXiESq+zgVIOoOZX3xVf7YsVH3vTzXP4F4MlCXiCvQ qdXu089G/hxdFXNpdUNNgPIc+KXWQCCMSx20wDee1i33zURVk5pUluYLPxdRK7uXBw TxAqBVkQfQXCWFQbqw75TA9yNfaV7fYJit//mIhmZ2TKF3Pg5rM1g3UAfB+FT2g5t3 RESvNVZnplAc1Gzu1zGkK+eE+95/VGEywpH/PR+UbKKJ2IIzgmnUU24Cv53mqKIl8D U/MndD9Q7Uzf/9ZYAI/Knw2ckXmfeDnnEcJHOV5kN4ZbZ+vyHiNnRZ9p6SmYKncllX pU90uIFI8olmA== From: Will Deacon To: linux-arm-kernel@lists.infradead.org, Will Deacon Cc: catalin.marinas@arm.com, kernel-team@android.com, linux-kernel@vger.kernel.org, ryabinin.a.a@gmail.com, glider@google.com, kasan-dev@googlegroups.com, Andrey Konovalov , Mark Rutland , syzbot+908886656a02769af987@syzkaller.appspotmail.com Subject: Re: [PATCH] kasan: Disable Software Tag-Based KASAN with GCC Date: Tue, 15 Oct 2024 13:39:08 +0100 Message-Id: <172898869113.658437.16326042568646594201.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20241014161100.18034-1-will@kernel.org> References: <20241014161100.18034-1-will@kernel.org> 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, 14 Oct 2024 17:11:00 +0100, Will Deacon wrote: > Syzbot reports a KASAN failure early during boot on arm64 when building > with GCC 12.2.0 and using the Software Tag-Based KASAN mode: > > | BUG: KASAN: invalid-access in smp_build_mpidr_hash arch/arm64/kernel/setup.c:133 [inline] > | BUG: KASAN: invalid-access in setup_arch+0x984/0xd60 arch/arm64/kernel/setup.c:356 > | Write of size 4 at addr 03ff800086867e00 by task swapper/0 > | Pointer tag: [03], memory tag: [fe] > > [...] Applied to arm64 (for-next/fixes), thanks! [1/1] kasan: Disable Software Tag-Based KASAN with GCC https://git.kernel.org/arm64/c/7aed6a2c51ff Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev