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 2D961C433FE for ; Mon, 17 Oct 2022 00:44:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229904AbiJQAod (ORCPT ); Sun, 16 Oct 2022 20:44:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230026AbiJQAo0 (ORCPT ); Sun, 16 Oct 2022 20:44:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E450FF32 for ; Sun, 16 Oct 2022 17:44:21 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 14F1460E8C for ; Mon, 17 Oct 2022 00:44:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6846BC433D6; Mon, 17 Oct 2022 00:44:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1665967460; bh=iyn+1JfKFr5NQ+ecNKxXi47JZcJYTzMNbt4Qywr+EEI=; h=Date:To:From:Subject:From; b=gLG7jRPpK+fFBdR6bmeRjW3IiYJ0Ysei0SDnsPXWzqgvO6SRQ6UqFohSZK9cucj1Y BdUbdhOOXH97S/kRdZtPY0/6l4n0Vq0e2Sa28OAdc6X5i9OSJFuKGsLQge1OIlE/7B ihNrbdbulR/FfLpfM5QillCUFNOgEk3wovCPwkek= Date: Sun, 16 Oct 2022 17:44:19 -0700 To: mm-commits@vger.kernel.org, mawupeng1@huawei.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-rmap-fix-comment-in-anon_vma_clone.patch added to mm-unstable branch Message-Id: <20221017004420.6846BC433D6@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm/rmap: fix comment in anon_vma_clone() has been added to the -mm mm-unstable branch. Its filename is mm-rmap-fix-comment-in-anon_vma_clone.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-rmap-fix-comment-in-anon_vma_clone.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ma Wupeng Subject: mm/rmap: fix comment in anon_vma_clone() Date: Fri, 14 Oct 2022 09:39:31 +0800 Commit 2555283eb40d ("mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse") use num_children and num_active_vmas to replace the origin degree to fix anon_vma UAF problem. Update the comment in anon_vma_clone to fit this change. Link: https://lkml.kernel.org/r/20221014013931.1565969-1-mawupeng1@huawei.com Signed-off-by: Ma Wupeng Signed-off-by: Andrew Morton --- mm/rmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/rmap.c~mm-rmap-fix-comment-in-anon_vma_clone +++ a/mm/rmap.c @@ -315,8 +315,8 @@ int anon_vma_clone(struct vm_area_struct enomem_failure: /* - * dst->anon_vma is dropped here otherwise its degree can be incorrectly - * decremented in unlink_anon_vmas(). + * dst->anon_vma is dropped here otherwise its num_active_vmas can + * be incorrectly decremented in unlink_anon_vmas(). * We can safely do this because callers of anon_vma_clone() don't care * about dst->anon_vma if anon_vma_clone() failed. */ _ Patches currently in -mm which might be from mawupeng1@huawei.com are mm-rmap-fix-comment-in-anon_vma_clone.patch