From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8803FC7EE2A for ; Sat, 20 May 2023 00:02:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229890AbjETACf (ORCPT ); Fri, 19 May 2023 20:02:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229627AbjETACb (ORCPT ); Fri, 19 May 2023 20:02:31 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08405E4D for ; Fri, 19 May 2023 17:01:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1684540864; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nJaiYO7hPfGCITlMv/e2fYDm8/jpubbHDQ4RMy5/oPM=; b=gpGYKW2aInraeYqXHiZHAVwLnTsX6le8r+tdfRqVqBH9L3JTi0SofgRbzKYV0+jalJSX5y +2xAa99FKoEUg0+OnvLcUfF9Ipv/dKrM1KACDZnkUhFBT68WN6D1K4IrDXUXK8LxUNaXTy B2MVCbjhGIGP5BCpy4zHiKprYfzx4+g= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-530-gdX8HUEaPSKe1E3KxEDqow-1; Fri, 19 May 2023 20:01:00 -0400 X-MC-Unique: gdX8HUEaPSKe1E3KxEDqow-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C53B1185A78E; Sat, 20 May 2023 00:00:59 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.221]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9B5751121314; Sat, 20 May 2023 00:00:57 +0000 (UTC) From: David Howells To: Jens Axboe , Al Viro , Christoph Hellwig Cc: David Howells , Matthew Wilcox , Jan Kara , Jeff Layton , David Hildenbrand , Jason Gunthorpe , Logan Gunthorpe , Hillf Danton , Christian Brauner , Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Christoph Hellwig , Steve French , John Hubbard Subject: [PATCH v21 02/30] splice: Make filemap_splice_read() check s_maxbytes Date: Sat, 20 May 2023 01:00:21 +0100 Message-Id: <20230520000049.2226926-3-dhowells@redhat.com> In-Reply-To: <20230520000049.2226926-1-dhowells@redhat.com> References: <20230520000049.2226926-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Make filemap_splice_read() check s_maxbytes analogously to filemap_read(). Signed-off-by: David Howells cc: Christoph Hellwig cc: Steve French cc: Jens Axboe cc: Al Viro cc: David Hildenbrand cc: John Hubbard cc: linux-mm@kvack.org cc: linux-block@vger.kernel.org cc: linux-fsdevel@vger.kernel.org --- mm/filemap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index a2006936a6ae..0fcb0b80c2e2 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2887,6 +2887,9 @@ ssize_t filemap_splice_read(struct file *in, loff_t *ppos, bool writably_mapped; int i, error = 0; + if (unlikely(*ppos >= in->f_mapping->host->i_sb->s_maxbytes)) + return 0; + init_sync_kiocb(&iocb, in); iocb.ki_pos = *ppos;