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 858F93624C5 for ; Wed, 15 Apr 2026 19:20:48 +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=1776280848; cv=none; b=oxjtJNyuVa18Xpv+h4WHZd28AKwN+SDYC/s3YQrg/p2z+ccEUj+iVZYeBQwu1Ctz/xVHIrKKGjigC71Cd+xvXai8aMNmURMJv2/twQXUyJkS01HOYBgVCN+Tp4RAU/c7NbrOIGLEoYj9JjIBB9nxSbwoaKHyvYIOOeQun4RL/F4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776280848; c=relaxed/simple; bh=i5bfYUf8ATPfwkWDkGgZcU65NagqeheqqmT79Qvitok=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=B33xfvtsUU2y+yyD8RolrdedGFRQCzao2EWSJgAYxpGPlmpYYhNc3HWtfULAWXaONDhMY7FVwn1dcovkvArdpmeARjRTQ2zZYJ8MWpqTJrvnq1SPFUIUnGpdkYBWac8IKOLGtpX0Riu7ZkulnblrRVZdEwT7qu8pj4IZcWWiqa8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TW4LkGWh; 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="TW4LkGWh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26618C19424; Wed, 15 Apr 2026 19:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776280848; bh=i5bfYUf8ATPfwkWDkGgZcU65NagqeheqqmT79Qvitok=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=TW4LkGWhfoEvuAUeOnC0VlmA0Kso4iWkw1okGq+iTm2oGsxBoFKq8/yIbWLgsquTK VmYAiZQqNCxoWcnnkxoGbZAFHyRoQRnxp+iDqRv/81IJM1I5M2NL7Y6tbbV5uXsqAi Xrd+RkBT7d0MP64BwFtF6QULfy+uJqJXQMkDuSidX9VNCxkQSTZ13aqUpo7Mna9NzK n9zt3/xpNPHeUqss8H35yL+67QMF3RLt6KvZ56t8VIqiIR8ecS3LOdidftK/fvmMt1 NCCvufeRZ8O+urtNJ3wLsA2QByJYgsqIAdsjpXSbJBdgQiBNeRYn4+VIPNR+C5zZh4 PsFQnHCW/VIGg== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id B9E52380A963; Wed, 15 Apr 2026 19:20:18 +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 bpf-next] bpf: Fix use-after-free in arena_vm_close on fork From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177628081756.2402333.11319934110573071839.git-patchwork-notify@kernel.org> Date: Wed, 15 Apr 2026 19:20:17 +0000 References: <20260413194245.21449-1-alexei.starovoitov@gmail.com> In-Reply-To: <20260413194245.21449-1-alexei.starovoitov@gmail.com> To: Alexei Starovoitov Cc: bpf@vger.kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@kernel.org, memxor@gmail.com, eddyz87@gmail.com Hello: This patch was applied to bpf/bpf.git (master) by Alexei Starovoitov : On Mon, 13 Apr 2026 12:42:45 -0700 you wrote: > From: Alexei Starovoitov > > arena_vm_open() only bumps vml->mmap_count but never registers the > child VMA in arena->vma_list. The vml->vma always points at the > parent VMA, so after parent munmap the pointer dangles. If the child > then calls bpf_arena_free_pages(), zap_pages() reads the stale > vml->vma triggering use-after-free. > > [...] Here is the summary with links: - [bpf-next] bpf: Fix use-after-free in arena_vm_close on fork https://git.kernel.org/bpf/bpf/c/4fddde2a732d You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html