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 75325C43334 for ; Tue, 19 Jul 2022 12:30:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238629AbiGSMay (ORCPT ); Tue, 19 Jul 2022 08:30:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240590AbiGSM3p (ORCPT ); Tue, 19 Jul 2022 08:29:45 -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 B00E067C90; Tue, 19 Jul 2022 05:11:24 -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 880206177D; Tue, 19 Jul 2022 12:11:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C8F5C341C6; Tue, 19 Jul 2022 12:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658232682; bh=gzhjaOxqShtKsnl0k/dz8F2fpvMZRtxKSgsm9ZB+LV0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=erxXx10kD1i5EMspLEBi/EOEhR7p0O2NavEIT9bHTiQGZvI6cdF0t8VaXlw8HSvqx h4FJsPDjSeyjZQflqCApc8qKVmPYi0zRXSv4ew37ETZ5zj2K7hOscHoLK84jmHY3Y9 85sqNolj6mmZqlrR2YODdUuulIEOh0aWvaE6HGlQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alyssa Rosenzweig , Steven Price , Dmitry Osipenko Subject: [PATCH 5.15 021/167] drm/panfrost: Fix shrinker list corruption by madvise IOCTL Date: Tue, 19 Jul 2022 13:52:33 +0200 Message-Id: <20220719114658.810006825@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220719114656.750574879@linuxfoundation.org> References: <20220719114656.750574879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dmitry Osipenko commit 9fc33eaaa979d112d10fea729edcd2a2e21aa912 upstream. Calling madvise IOCTL twice on BO causes memory shrinker list corruption and crashes kernel because BO is already on the list and it's added to the list again, while BO should be removed from the list before it's re-added. Fix it. Cc: stable@vger.kernel.org Fixes: 013b65101315 ("drm/panfrost: Add madvise and shrinker support") Acked-by: Alyssa Rosenzweig Reviewed-by: Steven Price Signed-off-by: Dmitry Osipenko Signed-off-by: Steven Price Link: https://patchwork.freedesktop.org/patch/msgid/20220630200601.1884120-3-dmitry.osipenko@collabora.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/panfrost/panfrost_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -422,8 +422,8 @@ static int panfrost_ioctl_madvise(struct if (args->retained) { if (args->madv == PANFROST_MADV_DONTNEED) - list_add_tail(&bo->base.madv_list, - &pfdev->shrinker_list); + list_move_tail(&bo->base.madv_list, + &pfdev->shrinker_list); else if (args->madv == PANFROST_MADV_WILLNEED) list_del_init(&bo->base.madv_list); }