From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9505F1386CB for ; Thu, 7 Mar 2024 20:25:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709843120; cv=none; b=AZhisylaB5axe8qOosad5Q9ceBCSSOJBiC8gAB0z9TasK5MFJFYJ04VigPMQNR4lIeCRXJzYbzfA+Yt/5uqxBJqTG4uIoNaFCpWmtClbDiM2chhhCk7mu5AVPTXps0gZSwIiBT77yqtjd46mIRjqYjdlIPLIYnpiwCMtobZj6To= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709843120; c=relaxed/simple; bh=wcksxAH5d0LJpyAK9834DF91YZ/vlDby1Av24OrRNTo=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=hwU50kmh0DZEeJ434irEBaCRN2a52kfWxNhtIZYsHnfvw4FrROci0DtWIRa9NIvMbh4Fq/H5lDWU146Ob6SUprC1Z4tFsxJF5AtJdrkzych76pRpl5Ve8GX9g9N/BgcbB2nYvcejSl5yohNyk0/9TW+kfGzlxXtq9e5qLXApZBo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--rnv.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=I8hIznqe; arc=none smtp.client-ip=209.85.216.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--rnv.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="I8hIznqe" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-29905ac5c21so118619a91.0 for ; Thu, 07 Mar 2024 12:25:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1709843118; x=1710447918; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=wcksxAH5d0LJpyAK9834DF91YZ/vlDby1Av24OrRNTo=; b=I8hIznqe8bNwUc83m62NzKtqkmnGCZdDM/BJgbJwDAYH3C9tEUiQ4ifF7cbgi7klav BovN5hZb7+xhNdEKx1vfiKowafs3HC76/I/x5ZaUtBmpCEL1mGtpPLfMfJKqzNGU+b8Z OmjQNBpUHy5f9cZRbvGILEXmeY/yGSxuszqE7pAiloD+U8XekSG+PUKC07CSqLUEUtXa zAdq794fIBp82vSLTtruVfwXlhWJA7a3MscznB1/Wis9aDsaUcdwKUVCAW3zPm9vN8zo 7wNLp+D+T/IjidscDkOk8aiIn7cKdIBt6Ymuv/+CqcZa87mJpcJ9X0nxcQO9eSJh4B7o vKKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709843118; x=1710447918; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=wcksxAH5d0LJpyAK9834DF91YZ/vlDby1Av24OrRNTo=; b=fjdfiu3FSK0U0ijQ9yW2aM9EeavIBXLoFDVKm+3HJ4h3Ucie1yhm649H1vDEd0NUUI qxvyPko3WgqJPOpNBp0yTJk8ESLN1h57g96pboAReXoVHwzd77+ruAUW17yiiF5O/FOt 2TYS+855aDaxMkM1uDySB0vWY4a/upIHImZ+3xJuX8POBJd4jj5KkePmYBKrV9FA3E0f 1TC0n37OA5aVmL5SSVVUGKV8hyUl4N0DL2vGs3H+uCYvS5S21U4qX4opG6nRqm3yUjei IqZMFarjIrhClkrrfjJhH5At5KfcG6vE3A1oDyW07+lMDSMxaMDfa26NC8cLyEiOEjch 8YWw== X-Forwarded-Encrypted: i=1; AJvYcCV8i2jdfBXOMY8FeiCaIZ5AO1F006E2w5jVvHc0x7E0j1JMIqT2JC8dbrBB6lfuOASex0uEcB+tvviWuLsvVjwfltCXOuAQ X-Gm-Message-State: AOJu0YxMBhRoUFT1kPYrOl0GBmuYBvkgkPgPSRD6MhLP67fImsOYgWZU ZFgom9GFSvRIZ9U51183rK4LvqMhNWbzN6iuk45BKZtAcNZd5aotRSzqKrsIFC+klA== X-Google-Smtp-Source: AGHT+IG5rhxQfiUQ3FbNS7mxcQgFCmb8lQ87KoIdi96NuNNVpEPDAise+9SzpwE/tXgKxUgupveBRao= X-Received: from cos-rnv.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:81d]) (user=rnv job=sendgmr) by 2002:a17:90b:4d8d:b0:29a:c853:6a20 with SMTP id oj13-20020a17090b4d8d00b0029ac8536a20mr51731pjb.0.1709843117685; Thu, 07 Mar 2024 12:25:17 -0800 (PST) Date: Thu, 7 Mar 2024 20:25:15 +0000 In-Reply-To: <2024030739-untidy-progress-3db2@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <2024030739-untidy-progress-3db2@gregkh> X-Mailer: git-send-email 2.44.0.278.ge034bb2e1d-goog Message-ID: <20240307202516.3162736-1-rnv@google.com> Subject: Re: [PATCH 6.1 214/219] mm, kmsan: fix infinite recursion due to RCU critical section From: Arnav Kansal To: gregkh@linuxfoundation.org Cc: akpm@linux-foundation.org, bp@alien8.de, dave.hansen@linux.intel.com, dvyukov@google.com, elver@google.com, glider@google.com, hpa@zytor.com, mingo@redhat.com, ovt@google.com, patches@lists.linux.dev, quic_charante@quicinc.com, rnv@google.com, stable@vger.kernel.org, syzbot+93a9e8a3dea8d6085e12@syzkaller.appspotmail.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" I was initially interested in backporting the commit dc904345e3 ("mm, kmsan: fix infinite recursion due to RCU critical section") to 5.10 and 5.15. However, this commit does not apply cleanly to those versions. Additionally, it seems this commit was intended to fix a bug introduced by commit 5ec8e8ea8b77 ("mm/sparsemem: fix race in accessing memory_section->usage") in 6.1, but that buggy commit may not be problematic in 5.10 or 5.15. Thanks, Arnav