From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 EAFF4194AFE for ; Thu, 1 Aug 2024 12:08:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722514140; cv=none; b=gNLZEtdkuB66hc/OPJHdLg4QP/dPjDCKylV+r4DxXfMqPg5ScFGpoGmpjcXnJocLg1jz1jIj2yZzKHcaY+KrttATslPdlpjK2xFPheTsgzJSCFY6xbnU2/IzXXRhedAMIPvwFOItEF+xbGvpxWl71CTG7jPpoRXxKwP7UTs5c2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722514140; c=relaxed/simple; bh=SqFmdthhxjhZoN+MbRwDB+pCfp3HdWMh/DwiMuR+0ik=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=qYF9kwoWlRahuk2vAjmATi18y7AAZyhiDkzeJoQ28bbBkdsA6OBOv2kCmAIp6xb/JEGYyfl/3h2R32yZzJcDmLVa90A4q1fQ6JAHhMhG/VPMr/rVdCqBZimFQU+g32XZ+Wf+dxSamEEeJHnoUQff44fGD99Yiur5jLJf5nnseUg= 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=209.85.166.71 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-f71.google.com with SMTP id ca18e2360f4ac-81fa58fbeceso667792839f.2 for ; Thu, 01 Aug 2024 05:08:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722514138; x=1723118938; 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=kghZQjLzdfxbI6zQtAYGeWfZsShZPKK3M+yNsz9Ej2s=; b=bOY0IxSCfqix64WKjvteq4UQNvirm/zJAkd8Y5ctvKVugy6qPlDbpEWrJ6KGOesCwR ngyChuH2BlyNPw20nQxkX6cOCh5X4U1xI2TLNGii0Oiiln5BS6XRo284Ocopu91SCRmW SlzscJXnuVQPSbBKJtHx3IIE+dKr8O8zNwYMxNMqOZq2EV0McSKJk97jky9hBcfWJcax 83vfWSh7W+uW5F9muXQEIIHMouGIVpOu2n0V7NW/e6I/7Ko2c4qyN63IB6s8FMw/uRWr HQixij6hlEN5HLolh+iTysGB34eHbW9tan+Y6PIOAtEBzjo1hsZYLyAvJhcU4bhOes4n NPsA== X-Gm-Message-State: AOJu0Ywr2BSu7mL58D/RLW/Z5hwZdTtwuJwO4wmPvmac4IYJ8kos9zCk OPZkMwcSjpWd+TpGRvAbbRQ+nglusVZHd5b257n9Xvu+/by2u+V5NDRAW//UcUwO+Vdms7FqZeh GV+pDdleW/xRaFTLO8bEO01TYTTcn5mYBdq+XawSA/5wMBT1G4MKz+SI= X-Google-Smtp-Source: AGHT+IHZn7eAkztxmHhviOhky2gK09UVELWBmVJqXWAOVbq6Any2FNxkN5aHXvqrALmyVrl7UtpXLg3isWDIzrF0Cl9ElTTo3wRy Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8510:b0:4b9:ad20:51f7 with SMTP id 8926c6da1cb9f-4c8c9b31021mr98985173.1.1722514137921; Thu, 01 Aug 2024 05:08:57 -0700 (PDT) Date: Thu, 01 Aug 2024 05:08:57 -0700 In-Reply-To: <000000000000a90e8c061e86a76b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004fcb37061e9e13ec@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 why folio not inited? #syz test: upstream 2f8c4f506285 diff --git a/mm/filemap.c b/mm/filemap.c index 657bcd887fdb..a830b22c9708 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3754,6 +3754,7 @@ 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, read_folio: %p %s\n", err, folio, mapping->host, filter, __func__); if (unlikely(err)) { folio_put(folio); if (err == -EEXIST) @@ -3787,6 +3788,7 @@ static struct folio *do_read_cache_folio(struct address_space *mapping, filler: err = filemap_read_folio(file, filler, folio); + printk("err: %d, folio: %p, folio uptod: %d, %s\n", err, folio, folio_test_uptodate(folio), __func__); if (err) { folio_put(folio); if (err == AOP_TRUNCATED_PAGE) diff --git a/fs/namei.c b/fs/namei.c index 3a4c40e12f78..3f72aa8d604d 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -5272,6 +5272,8 @@ const char *page_get_link(struct dentry *dentry, struct inode *inode, page = read_mapping_page(mapping, 0, NULL); if (IS_ERR(page)) return (char*)page; + else if (IS_ERR(page_folio(page))) + return (char*)page_folio(page); } set_delayed_call(callback, page_put_link, page); BUG_ON(mapping_gfp_mask(mapping) & __GFP_HIGHMEM); diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c index a8c1e7f9a609..d581cea14316 100644 --- a/fs/squashfs/file.c +++ b/fs/squashfs/file.c @@ -459,6 +459,8 @@ static int squashfs_read_folio(struct file *file, struct folio *folio) TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n", page->index, squashfs_i(inode)->start); + printk("folio: %p, isize: %d, pidx: %d, idx: %d, fe: %d, %s\n", + folio, i_size_read(inode), page->index, index, file_end, __func__); if (page->index >= ((i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT)) goto out; @@ -478,6 +480,7 @@ static int squashfs_read_folio(struct file *file, struct folio *folio) } else res = squashfs_readpage_fragment(page, expected); + printk("res: %d, %s\n", res, __func__); if (!res) return 0; @@ -489,6 +492,7 @@ static int squashfs_read_folio(struct file *file, struct folio *folio) if (res == 0) SetPageUptodate(page); unlock_page(page); + printk("out, res: %d, %s\n", res, __func__); return res; } diff --git a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c index 6ef735bd841a..7e41196ea8de 100644 --- a/fs/squashfs/symlink.c +++ b/fs/squashfs/symlink.c @@ -49,6 +49,8 @@ static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) /* * Skip index bytes into symlink metadata. */ + printk("folio: %p, isize: %d, idx: %d, %s\n", + folio, i_size_read(inode), index, __func__); if (index) { bytes = squashfs_read_metadata(sb, NULL, &block, &offset, index); @@ -93,6 +95,7 @@ static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) flush_dcache_folio(folio); error = 0; out: + printk("error: %d, %s\n", error, __func__); folio_end_read(folio, error == 0); return error; }