From nobody Sat May 9 10:21:32 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 AD20CC433F5 for ; Mon, 16 May 2022 07:19:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240990AbiEPHTn (ORCPT ); Mon, 16 May 2022 03:19:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240850AbiEPHTi (ORCPT ); Mon, 16 May 2022 03:19:38 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 474E713E2D for ; Mon, 16 May 2022 00:19:37 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id k16so6504861pff.5 for ; Mon, 16 May 2022 00:19:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qyLHbvhHFnCVFcl2COEIHo1ekgk1vr9Xt9RbCWp5UFQ=; b=gWZ/uLYoxu/kOyjLksLZcv+dOHRs0RxWiRMgL/e3NTe/zcuWfZE4OwVyRl82B25GPk 5yxu81Tf/5re2BOnhJ9tM9zb1UjjOUbu8dokeAvyAPhIJ21m4sfR6tPMQEirHKic66IK hR+2onUKYpC4USUs2SUPmp1zU+CayVUEpfoighxjx25a1B1z8uNxUu4xr1YM+z7BK2ql JM8yKK9hWUSfu6d/b5zUL1k8iselDYAynzv6DFpEOL2O7MvKLWPg85+cbAK7GIupAmAL AoEDPl3m4f376euhRP87SKBZ1SFae/y39Jv96okMDaZev7rxI4DHoZAD/W7BE99DmpyO AcjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qyLHbvhHFnCVFcl2COEIHo1ekgk1vr9Xt9RbCWp5UFQ=; b=UFRFeTX52qnAl3tk3U3jOBzRdAu1tDTygUKGyNd8gMWii6U7xzCQHbTvnZvArdpGQI 6iBvYz3bFPBtrbSXKzzxu22oGDXMIIvxluJJdC9feNxeuPZbRZvDcFElaqEAzPli6l+f Q/VgoDkQsgPM2pBE9O+zyqBoxEWNWfcX4eWSzlEfuSHT/iaPn6eq4EVamcV9zJWR31vL ZU9nbm0NFVJEe0BmjE61E2ICpSVANU0iUX1Bi4g5peJF6r0L7sr8dm6Lp0Rc4M1vyzFh nkuFBrjkhIB3XbuFlZ7bvJHZdCR0b6i8XrMNJ8cdgu8Rj160VcdumRZDzwkOQj7dtzlG bPwQ== X-Gm-Message-State: AOAM5313/3Hu6wj79oQagoxjCunY9hO099POeIwty7aq/4A+xnk8bLL3 4VX/1D7fC9bMY0UpqrvLeZHN2MAxX2s0SA== X-Google-Smtp-Source: ABdhPJweiKIlidVaFIASEcdabrwZzHCL4vm7fIHzGiDCKcF8TnRwifNYRCrEeShRqttSrbTd3azeHQ== X-Received: by 2002:a05:6a00:1c53:b0:50d:5860:5b58 with SMTP id s19-20020a056a001c5300b0050d58605b58mr15944850pfw.85.1652685576873; Mon, 16 May 2022 00:19:36 -0700 (PDT) Received: from localhost.localdomain ([103.84.139.165]) by smtp.gmail.com with ESMTPSA id z7-20020a170902d54700b0015e8d4eb2e8sm2527500plf.306.2022.05.16.00.19.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 00:19:36 -0700 (PDT) From: Hangyu Hua To: jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, tvrtko.ursulin@linux.intel.com, airlied@linux.ie, daniel@ffwll.ch, ville.syrjala@linux.intel.com, jose.souza@intel.com, Bhawanpreet.Lakha@amd.com, matthew.d.roper@intel.com, heying24@huawei.com, anshuman.gupta@intel.com, james.ausmus@intel.com Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Hangyu Hua Subject: [PATCH] drm: i915: fix a possible refcount leak in intel_dp_add_mst_connector() Date: Mon, 16 May 2022 15:19:22 +0800 Message-Id: <20220516071922.22955-1-hbh25y@gmail.com> X-Mailer: git-send-email 2.25.1 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 drm_connector_init fails, intel_connector_free will be called to take=20 care of proper free. So it is necessary to drop the refcount of port=20 before intel_connector_free. Fixes: 091a4f91942a ("drm/i915: Handle drm-layer errors in intel_dp_add_mst= _connector") Signed-off-by: Hangyu Hua Reviewed-by: Jos=C3=A9 Roberto de Souza --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/= i915/display/intel_dp_mst.c index e30e698aa684..f7d46ea3afb9 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -841,6 +841,7 @@ static struct drm_connector *intel_dp_add_mst_connector= (struct drm_dp_mst_topolo ret =3D drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); if (ret) { + drm_dp_mst_put_port_malloc(port); intel_connector_free(intel_connector); return NULL; } --=20 2.25.1