From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 CCB98481DD for ; Thu, 1 Aug 2024 09:07:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722503225; cv=none; b=UBYK20cTnbitRjwEEEfe/vmNmV38j9Dl3yVFD05C58DNI/LOvfYP6/HH+ELbTxUr9WDQTbRkto5JQ3ivDRZF/KCR3xU16/ZcTbN6kHC/YHYgB9OfXEg7yVdBqQt2cIFiM90pEWwc1c1NoIhuMyA8zGaVQXBmk+Nh2z5JKGR1L3U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722503225; c=relaxed/simple; bh=Bka2MgsvDMXEH6a/ihmJ/MI5XdcmHXl1pCEmhX7lFic=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=JHzzc3K4Ke2LLFPC7zFyrj9TZOMOaLjiZAJICgMIcDSvdMOu8E4aQS5/nKThI0+NmEEd1/JVghMlb87mwgmKR5fnbtthvBPWr2cMkmRz2WqpukIJUAeaMSHvN+nIe7NEw9W2D6eORlDu9utXnZoC5x6JMkspfJBBYgoSY7OfuLQ= 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=209.85.166.70 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-io1-f70.google.com with SMTP id ca18e2360f4ac-81f93601444so958551239f.2 for ; Thu, 01 Aug 2024 02:07:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722503223; x=1723108023; 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=iCbOBywQ/beDPX6EfmMM8UkUclL6iPr3Egvn3XiHWKA=; b=BJP3EEc87Aa6S1B633gSVYn4OYsIip86u4OGRkol1SFzOZGeXDAA8CB9EFV1urRETT PrE5F37gWdRwnUTHj7ulejYRWZBUgiRtpsWjTt0LQFbcWuiUgB6TvCcK9ZjvB/WdHNTP vju0kx9fJp8ZqokZQ/k1WLeP+YfnYTiVhYJEsDIiom5y1raktUFViD7bhxKrjfzoH3hY TDCYEIfBQUGbNS0V/HFeE5Vleu7nt1sD9DG7T3FACg3w9kLmH1W5HVqWJYktXhlXYNiW WTYCHrfuq44RtiLRTI8SYWA+FrYmKgO6C+uRXbtR60rMJExLqRfFdeIqHSGAFnGQ2GBv CsWQ== X-Gm-Message-State: AOJu0YwQ0WYtxlmpBDQ0kYOtLPeNUj+XejEFCx+QhKNvrQufzqTVBNbR +nlcz02deLeay0b/OpzmSbOfMonH+qfVj7G+6dA5RIhPlSczA9J922yAoQJb89vIeo9XcG31FHO 5dhXBuypv1r80CEJkLvIFNaRrfD9BSQ8pluSdyftml92dozkvwDSA+YA= X-Google-Smtp-Source: AGHT+IFiuEJDndYVTfdC6gzH2BYR5SZLCMr7S16Sj6+OcO/WQE7P512YF/E7ZVNpSxTP6sqZy4O3JTTkl4WwGVxysYwFdChCGqmW Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:6d19:b0:808:7e26:8454 with SMTP id ca18e2360f4ac-81fcc0ee904mr4446039f.1.1722503222934; Thu, 01 Aug 2024 02:07:02 -0700 (PDT) Date: Thu, 01 Aug 2024 02:07:02 -0700 In-Reply-To: <000000000000a90e8c061e86a76b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ba4cb6061e9b88f8@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..8faa75f6923c 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3754,11 +3754,15 @@ static struct folio *do_read_cache_folio(struct address_space *mapping, if (!folio) return ERR_PTR(-ENOMEM); err = filemap_add_folio(mapping, folio, index, gfp); + printk("err: %d, folio: %p, in: %p, %s\n", err, folio, mapping->host, __func__); if (unlikely(err)) { folio_put(folio); if (err == -EEXIST) goto repeat; /* Presumably ENOMEM for xarray node */ + void *kaddr = kmap_local_folio(folio, 0); + memset(kaddr, 0, folio_size(folio)); + kunmap_local(kaddr); return ERR_PTR(err); }