From nobody Fri Apr 3 02:23:06 2026 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 5F849C6FA86 for ; Fri, 16 Sep 2022 20:48:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230377AbiIPUsI (ORCPT ); Fri, 16 Sep 2022 16:48:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229861AbiIPUsE (ORCPT ); Fri, 16 Sep 2022 16:48:04 -0400 Received: from mail-oa1-x2a.google.com (mail-oa1-x2a.google.com [IPv6:2001:4860:4864:20::2a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E52D4BA154 for ; Fri, 16 Sep 2022 13:48:02 -0700 (PDT) Received: by mail-oa1-x2a.google.com with SMTP id 586e51a60fabf-12b542cb1d3so44043954fac.13 for ; Fri, 16 Sep 2022 13:48:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=8tndNWWo7lA8zxMWjXo79wFYy7T8DZ1WmSv9NU+Qn00=; b=ZWmfg1lRRT5cNVKTt0jTiHBgVMqzXKAg+mWeUHDA+3U1KWQQ49oYipINIxDFBWou6A OB4YQ8Z+slpnBCt0Ecv5s5cwk0g6/rfOl2/r4ds6cmgk3w8l+x2lTMSOp8Co0lyYwzdG f6XKy/puez2KLA3pbV37FoAKgr2RaXgNNyqPq+FJOxxxhBtbiihCspumLXPWuZm+FHjo awwyHCuyTSbbb+8IW5dBx/kMJgoOvf1kiJcQGwigm8xFAq3Jg6I/OC5CMbQinQTxI9x7 ZQ8arAuZiUjrqVYmYHW3St2FHRGm+ASRqoTvvQ25s9EC7luoiUm9EMn/z8bwG6wP7OU2 azrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=8tndNWWo7lA8zxMWjXo79wFYy7T8DZ1WmSv9NU+Qn00=; b=XjwcudF/BM57GwzGhsXM/PWLjUaROwppT+42RwdrNSC+B3ZL5ZoYS4UgVLxm0axaBh kbpHWMvhTQooZv8oI+u4yH5S9WSrMbwr2Hur/J2TQAd8se9PSKJcVa3UWxrh28LmIuXd /PX/VXads7hTd4vOtTM/N9ijTu0OS0i+6SKN8h/TgiF9lPH7th4BsW0FqLe3E7DJwxvD 7beZM80/Ci8n3zQsOnFpgMlqzrczVcf7AL8Fo+Yz9EZIIYfzi4T57esJ9xyMM3B8mXFc UDQ9ffNTkaVYi5S/rmYObdDIRMAkRMtjSOMAcGSUB68Pho1RVegYS7IaycsC77tly/sl KdaA== X-Gm-Message-State: ACgBeo0K82q1LpPftIhWdS80vYRMneVNI8W2HLLpaBUgPNVNIPsMF2Ur SWmqIwnzg8+X50CXaB1SddCJ7ZBRbcg= X-Google-Smtp-Source: AA6agR5G+ecb3He752RviFLpk7+0KdXJV/JKh/ZKfmg8l+9nkf1YYT8QIY9isMCp9DXbMAlDo2T6rw== X-Received: by 2002:a05:6870:b290:b0:127:4089:227a with SMTP id c16-20020a056870b29000b001274089227amr9788780oao.8.1663361282172; Fri, 16 Sep 2022 13:48:02 -0700 (PDT) Received: from macondo.. ([2804:431:e7cd:8cb3:43e6:f4f3:1b9f:38fe]) by smtp.gmail.com with ESMTPSA id r20-20020a4aea94000000b0044b47bb023fsm1803963ooh.37.2022.09.16.13.47.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Sep 2022 13:48:01 -0700 (PDT) From: Rafael Mendonca To: Zack Rusin , VMware Graphics Reviewers , David Airlie , Daniel Vetter , Martin Krastev Cc: Rafael Mendonca , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/vmwgfx: Fix memory leak in vmw_mksstat_add_ioctl() Date: Fri, 16 Sep 2022 17:47:51 -0300 Message-Id: <20220916204751.720716-1-rafaelmendsr@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" If the copy of the description string from userspace fails, then the page for the instance descriptor doesn't get freed before returning -EFAULT, which leads to a memleak. Fixes: 7a7a933edd6c ("drm/vmwgfx: Introduce VMware mks-guest-stats") Signed-off-by: Rafael Mendonca Reviewed-by: Martin Krastev --- drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c b/drivers/gpu/drm/vmwgfx/v= mwgfx_msg.c index 2aceac7856e2..089046fa21be 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c @@ -1076,6 +1076,7 @@ int vmw_mksstat_add_ioctl(struct drm_device *dev, voi= d *data, =20 if (desc_len < 0) { atomic_set(&dev_priv->mksstat_user_pids[slot], 0); + __free_page(page); return -EFAULT; } =20 --=20 2.34.1