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 950071386CA 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=msCcYbr7ER9xtSf1pevxfljRx43bGtuv5mgjS4thV8u1+d5M9L2WMM61Y+MU5nBVOCq+N0td8yLjCs5KVHwEGB/AaGYSitG2o6nv9AK1EXvgNv6SWOh+pQsf0DTnA/RoFNpkp6snIy1LHnsF9kqJaiaYDoHMnq/kkgOA+QR/Nlk= 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=y6bZzn9r; 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="y6bZzn9r" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-29b4867fc07so106437a91.2 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=lists.linux.dev; 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=y6bZzn9rATizSmUNmIv9UZ8yrf9yQG9hhLj0qtshf04kJix6GApWbltEQJ+C0+Dhck u2a876lY0bi+gCnqauqMrUBux6HdoaFBae6ysOQ2GHizrJrZzb2hGjf//Fekl2ztZgGa A7rF5eterN7G1DIJPaPlg1meY3CJFQSOf21fwb6e6PnZBv2G8lqqyZMWNERTkR73mGMJ BJfh121dhixI0XiXi2g4sUUhlRORb/JPKwPGIUfDqbMDWwBOLL59BJXFFjPg6L6VTJir LN9nLbPuP+7eCleBRdrgRb/fs/TkawKBdnmLl1UWTPV4F9KQVl4Akjj15lEEgHTLN/ku HGpA== 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=ReUWvrTaCPC92xm947syOhBjz6vadzpMdTbaoIEl1Abiuyl941Py55hJLUfLgoyUtH d+Hb2e4bEkCiUJelmEpDLC9+eAv+eRQ/bT1vA3L5lfYiy1fozZbWQ/NCCnhCyyp5PoyR Q3m/PoYnzC5HV05t3K9AWbsG06uIXYdeHLqX9qiYOfYWDNymdrh9n++lGw+q0d0Uxfgr APXTYCGPoxLmrXWLKnbbMo9h+lukOO1AhcHHXcmuaRc4pZYMBSL0WTkgwwMO/kFFSi7J 7gGYuWFkjMZ4hfUTLvUOXB/6xiqLb1NLe1fjfxG+yUcsuWKk2haBFK4GC/NaNkKRaNAA jwwg== X-Forwarded-Encrypted: i=1; AJvYcCUzUAdYly5boZ5lfLEXlrMVnFznCiAwzv4GJJtFN8O3tWzqdwDD1khZHAT6znheT1OM9a45ErQ9DHPiuCSKTSxHNOr8sqbfbw== X-Gm-Message-State: AOJu0YwdiW9pQva7s1kPiv5s8DrSv89fH2QUvtNULlp0qWEuWoHcaC6U O15fe2GS2iP9OoM5mQ+oZq9Bj6zKTuZ4LFexUm7SOpw+PSUkOmyGUozZtreAB1215w== 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: patches@lists.linux.dev 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