From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 260BB14A4C8 for ; Thu, 1 Aug 2024 01:23:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722475429; cv=none; b=Yj4SKEegjSYEJGeev3hc3HeTF3fhFiLuBxi1SJuWqcwfhBeIAmFsqQRiIUw8uU+pJ9x9fqVtgjFdvEQaqEGSLdkDCYD8YcSDY5lG9nveBEU/PKPHTW9buDrhi8mkzKairO6ntZHbF+EYb7yOke7SAT8EVzVtnz6VdELi194p9Sc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722475429; c=relaxed/simple; bh=88R3I3nJMuOBubWcM4qZLeuRhWZLK+c8AwPnq8IWZ5Y=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=o6pow8QzgJ+bruEr7qHVN+6AE3M/TV4tWhjuxbDNpLEwDB8wtuTAfJ3WzeiCJYPGbHWhvBPVSTcx2JRmAQRiZ7lioQAJUzj17D8/Dg202N8F9r5j6vMBCvCxoh2I4Pwa96mcDqbqGClfvEnCnXOl/a66GrMuBz+gv7r+gbmOSGo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-39ae9bc764bso83347855ab.0 for ; Wed, 31 Jul 2024 18:23:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722475427; x=1723080227; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Y7c/7LfuOUosVBv493AWIei1s4Bg5R8/Ms3NQCI0I54=; b=M2OZK8zHKMboAZ7yp3/452K+TIgyQOe+kyU1/FEzBhi/DAtThpHj/ovP67AcAyRtSB vX+QoBWj1itdZ5fpOWSKtO1zECRsJEXxret1jbZTK2JBDsLQOqtc3el1EbEuV/wODeMB /vNYHYwGGBGL+5SBZLVzMqKYX8WtyWW8QtXQvWYxbBATAn8791wEpOPqYEseZfRqWC6T 1F+DiiXgKhkz+HosymZZUVTe6plf4078mWv/MZArP5V3ng9CmZ0wbZSuSbg6oxnO1FVa 4MJwTVHYlySjmmqNaroZD+PPsvLGp2orb6slz1g+V93NIXgKR8451W3HaRmK2OHOAvd5 YAdw== X-Gm-Message-State: AOJu0YztsXFkJGr+3HCDpZhOpGRKurNgN4VFqSW3AnvJfzW5+G4HRSpL IQ7YfnDXXyn69Fe1nip5ACNprSenXBGtDimT+PYYt7l3lWGxeRzNi2PXsX4QIsIjFTjICCNdh55 LIIkX+17CQKoXSQDo5lXnC4Zt4RB6bFftJQCXv3vDHjz6UioFD8HbPKE= X-Google-Smtp-Source: AGHT+IFWcAnRvFj2e5rM7UVq2BmbnU1c+lZcSctXvjsyjFftm4VerLNwP3T2aiqI4q+ngvI1FOz6uT983RZmfduOdJEzqcjjOGcZ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a88:b0:397:ca8e:d377 with SMTP id e9e14a558f8ab-39b182e2272mr516385ab.0.1722475427206; Wed, 31 Jul 2024 18:23:47 -0700 (PDT) Date: Wed, 31 Jul 2024 18:23:47 -0700 In-Reply-To: <000000000000a90e8c061e86a76b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f929b3061e950fce@google.com> Subject: Re: [syzbot] Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick_link From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick_link Author: lizhi.xu@windriver.com if alloc new folio for filemap, init mem to zero #syz test: upstream 2f8c4f506285 diff --git a/mm/filemap.c b/mm/filemap.c index 657bcd887fdb..1b22eab691e8 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3753,6 +3753,11 @@ static struct folio *do_read_cache_folio(struct address_space *mapping, folio = filemap_alloc_folio(gfp, 0); if (!folio) return ERR_PTR(-ENOMEM); + + void *kaddr = kmap_local_folio(folio, 0); + memset(kaddr, 0, folio_size(folio)); + kunmap_local(kaddr); + err = filemap_add_folio(mapping, folio, index, gfp); if (unlikely(err)) { folio_put(folio);