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 306F686359 for ; Tue, 16 Dec 2025 19:03:22 +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=1765911803; cv=none; b=J5xHvVlh3+if948bzTxNwiFMBhzn91uDTIIpcIzPI6A+zktuE8KCX6cekupIj2tkhFeMXsSz3ORWAsY8z+30HdHSS3UO7LpIJ6lIJJi15XXPb8GBS3HMJSDfYCadaeK//2BQwRNIFrUhBjCjIqxehEKyS4egX38lbT2D79OBenk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765911803; c=relaxed/simple; bh=u+rErwwgdGAxYPIn7ahIQM7o8HQfloX64mhwwEQJ/MY=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=tZVPZiStHQxFpm+hHB6gEXz8s4P+pcSIGS3tx5rV5enBYz/tNvfjy3tlNCA5h7MCHOPoB1B1e2K+Pk2Xgyvr/ycLlGh9r5hUZO3eFGQBdVcg4NV7QG1673NlnbrQMootBP5mPjSe8F+xalM5LdJKlWmslWRAKajjNFcZOWqJyv8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F3eCrrgw; 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="F3eCrrgw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A595AC4CEF1; Tue, 16 Dec 2025 19:03:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765911802; bh=u+rErwwgdGAxYPIn7ahIQM7o8HQfloX64mhwwEQJ/MY=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=F3eCrrgwb9Nswrc2WLzVeBYIW6RRTnMN7hoyOFis5Lwxp4SoLjzu2xJSQZaBp3hbE c0/hw7xBszy1urQtzMh1OTV0qwQLLREQFlZNrOPLeoASlxbflsYNYj1vrGofrpKyVp N6f2AFOP9y+EW6AdQlWU3BCKsxrh3am0PzTJkfMnOl+4iHkRSTIK9zz1W61VwmpZ55 qFR/bH7ZoveiyN8HzWLcMZFEOchJz6hRCBy6t0kNWvRExftgTKR/z2RHsj0kwp71YN Mk3MYMbMRgLLMV0lOajMK/zjxph/ZjXCa07tND3JSfkW9DsruJtyzwIVrUaHbJV5pf S3SjgC01DUOgg== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 787CA3808200; Tue, 16 Dec 2025 19:00:14 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v4 0/5] libbpf: move arena variables out of the zero page From: patchwork-bot+netdevbpf@kernel.org Message-Id: <176591161329.1242102.6732390197852635004.git-patchwork-notify@kernel.org> Date: Tue, 16 Dec 2025 19:00:13 +0000 References: <20251216173325.98465-1-emil@etsalapatis.com> In-Reply-To: <20251216173325.98465-1-emil@etsalapatis.com> To: Emil Tsalapatis Cc: bpf@vger.kernel.org, andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, memxor@gmail.com, yonghong.song@linux.dev Hello: This series was applied to bpf/bpf-next.git (master) by Andrii Nakryiko : On Tue, 16 Dec 2025 12:33:20 -0500 you wrote: > Modify libbpf to place arena globals at the end of the arena mapping > instead of the very beginning. This allows programs to leave the > "zero page" of the arena unmapped, so that NULL arena pointer > dereferences trigger a page fault and associated backtrace in BPF streams. > In contrast, the current policy of placing global data in the zero pages > means that NULL dereferences silently corrupt global data, e.g, arena > qspinlock state. This makes arena bugs more difficult to debug. > > [...] Here is the summary with links: - [v4,1/5] selftests/bpf: explicitly account for globals in verifier_arena_large https://git.kernel.org/bpf/bpf-next/c/0355911ac021 - [v4,2/5] bpf/verifier: do not limit maximum direct offset into arena map https://git.kernel.org/bpf/bpf-next/c/12a1fe6e12db - [v4,3/5] libbpf: turn relo_core->sym_off unsigned https://git.kernel.org/bpf/bpf-next/c/0aa721437e4b - [v4,4/5] libbpf: move arena globals to the end of the arena https://git.kernel.org/bpf/bpf-next/c/c1f61171d44b - [v4,5/5] selftests/bpf: add tests for the arena offset of globals https://git.kernel.org/bpf/bpf-next/c/19f12431b6c3 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html