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 2B196C27C76 for ; Sun, 22 Jan 2023 01:21:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229763AbjAVBVS (ORCPT ); Sat, 21 Jan 2023 20:21:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229463AbjAVBVR (ORCPT ); Sat, 21 Jan 2023 20:21:17 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0404C24484 for ; Sat, 21 Jan 2023 17:21:17 -0800 (PST) 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 90CF560B42 for ; Sun, 22 Jan 2023 01:21:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA60AC433EF; Sun, 22 Jan 2023 01:21:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1674350476; bh=BeCrb6jgBhnJk0oFQJugdzSyLO/L1q4sqDP0Nyfosg0=; h=Date:To:From:Subject:From; b=DOOWZCb733CKQpjnlJUPgzjCxXXNjvtuhICzj3DzPFVxR0XHDw6vrCjAChYvSZcaS nV1ZhuVNmmaS5BkI9ixf0w1yBvGt5VqJ7FEC7vHCB74JBpXbO4SBRwhqY1eGihsW6E P8K3qTQTymZYT680qbtgUNWuTj9TsV83eXLff/L8= Date: Sat, 21 Jan 2023 17:21:15 -0800 To: mm-commits@vger.kernel.org, vincenzo.frascino@arm.com, urezki@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, andreyknvl@gmail.com, hch@lst.de, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-reject-vmap-with-vm_flush_reset_perms.patch added to mm-unstable branch Message-Id: <20230122012115.EA60AC433EF@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: reject vmap with VM_FLUSH_RESET_PERMS has been added to the -mm mm-unstable branch. Its filename is mm-reject-vmap-with-vm_flush_reset_perms.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-reject-vmap-with-vm_flush_reset_perms.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: Christoph Hellwig Subject: mm: reject vmap with VM_FLUSH_RESET_PERMS Date: Sat, 21 Jan 2023 08:10:42 +0100 Patch series "cleanup vfree and vunmap". This little series untangles the vfree and vunmap code path a bit. This patch (of 10): VM_FLUSH_RESET_PERMS is just for use with vmalloc as it is tied to freeing the underlying pages. Link: https://lkml.kernel.org/r/20230121071051.1143058-1-hch@lst.de Link: https://lkml.kernel.org/r/20230121071051.1143058-2-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Uladzislau Rezki (Sony) Cc: Alexander Potapenko Cc: Andrey Konovalov Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Vincenzo Frascino Signed-off-by: Andrew Morton --- --- a/mm/vmalloc.c~mm-reject-vmap-with-vm_flush_reset_perms +++ a/mm/vmalloc.c @@ -2883,6 +2883,9 @@ void *vmap(struct page **pages, unsigned might_sleep(); + if (WARN_ON_ONCE(flags & VM_FLUSH_RESET_PERMS)) + return NULL; + /* * Your top guard is someone else's bottom guard. Not having a top * guard compromises someone else's mappings too. _ Patches currently in -mm which might be from hch@lst.de are revert-remoteproc-qcom_q6v5_mss-map-unmap-metadata-region-before-after-use.patch mm-reject-vmap-with-vm_flush_reset_perms.patch mm-remove-__vfree.patch mm-remove-__vfree_deferred.patch mm-move-vmalloc_init-and-free_work-down-in-vmallocc.patch mm-call-vfree-instead-of-__vunmap-from-delayed_vfree_work.patch mm-move-__remove_vm_area-out-of-va_remove_mappings.patch mm-use-remove_vm_area-in-__vunmap.patch mm-move-debug-checks-from-__vunmap-to-remove_vm_area.patch mm-split-__vunmap.patch mm-refactor-va_remove_mappings.patch