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a="28136022" X-IronPort-AV: E=Sophos;i="6.09,168,1716274800"; d="scan'208";a="28136022" X-CSE-ConnectionGUID: IvJqDkC3SaCYGJQcXlxh+Q== X-CSE-MsgGUID: pmD5I61ARPy+l7mXDTbkYg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,168,1716274800"; d="scan'208";a="44677906" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, kraxel@redhat.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH 1/2] vfio/display: Fix potential memleak of edid info Date: Fri, 28 Jun 2024 17:28:14 +0800 Message-Id: <20240628092815.164423-2-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240628092815.164423-1-zhenzhong.duan@intel.com> References: <20240628092815.164423-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.12; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -45 X-Spam_score: -4.6 X-Spam_bar: ---- X-Spam_report: (-4.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.212, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1719567123464100001 Content-Type: text/plain; charset="utf-8" EDID related device region info is leaked in three paths: 1. In vfio_get_dev_region_info(), when edid info isn't find, the last device region info is leaked. 2. In vfio_display_edid_init() error path, edid info is leaked. 3. In VFIODisplay destroying path, edid info is leaked. Fixes: 08479114b0de ("vfio/display: add edid support.") Signed-off-by: Zhenzhong Duan --- hw/vfio/display.c | 2 ++ hw/vfio/helpers.c | 1 + 2 files changed, 3 insertions(+) diff --git a/hw/vfio/display.c b/hw/vfio/display.c index 661e921616..5926bd6628 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -171,6 +171,7 @@ static void vfio_display_edid_init(VFIOPCIDevice *vdev) =20 err: trace_vfio_display_edid_write_error(); + g_free(dpy->edid_info); g_free(dpy->edid_regs); dpy->edid_regs =3D NULL; return; @@ -182,6 +183,7 @@ static void vfio_display_edid_exit(VFIODisplay *dpy) return; } =20 + g_free(dpy->edid_info); g_free(dpy->edid_regs); g_free(dpy->edid_blob); timer_free(dpy->edid_link_timer); diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c index b14edd46ed..3dd32b26a4 100644 --- a/hw/vfio/helpers.c +++ b/hw/vfio/helpers.c @@ -586,6 +586,7 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint= 32_t type, g_free(*info); } =20 + g_free(*info); *info =3D NULL; return -ENODEV; } --=20 2.34.1