lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-Id: <20210923173336.3.If9e74fa9b1d6eaa9e0e5b95b2b957b992740251c@changeid>
Date:   Thu, 23 Sep 2021 17:33:55 -0700
From:   Brian Norris <briannorris@...omium.org>
To:     Sam Ravnborg <sam@...nborg.org>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Heiko Stuebner <heiko@...ech.de>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Brian Norris <briannorris@...omium.org>
Subject: [PATCH 3/3] drm/panel: Delete panel on mipi_dsi_attach() failure

Many DSI panel drivers fail to clean up their panel references on
mipi_dsi_attach() failure, so we're leaving a dangling drm_panel
reference to freed memory. Clean that up on failure.

Noticed by inspection, after seeing similar problems on other drivers.
Therefore, I'm not marking Fixes/stable.

Signed-off-by: Brian Norris <briannorris@...omium.org>
---

 drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c    | 8 +++++++-
 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c           | 8 +++++++-
 drivers/gpu/drm/panel/panel-novatek-nt36672a.c           | 8 +++++++-
 drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c     | 8 +++++++-
 drivers/gpu/drm/panel/panel-ronbo-rb070d30.c             | 8 +++++++-
 drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c | 1 +
 drivers/gpu/drm/panel/panel-samsung-sofef00.c            | 1 +
 drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c          | 8 +++++++-
 8 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
index 581661b506f8..f9c1f7bc8218 100644
--- a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
+++ b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
@@ -227,7 +227,13 @@ static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->lanes = 4;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int feiyang_dsi_remove(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 733010b5e4f5..3c86ad262d5e 100644
--- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -473,7 +473,13 @@ static int jdi_panel_probe(struct mipi_dsi_device *dsi)
 	if (ret < 0)
 		return ret;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		jdi_panel_del(jdi);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int jdi_panel_remove(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
index 533cd3934b8b..839b263fb3c0 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
@@ -656,7 +656,13 @@ static int nt36672a_panel_probe(struct mipi_dsi_device *dsi)
 	if (err < 0)
 		return err;
 
-	return mipi_dsi_attach(dsi);
+	err = mipi_dsi_attach(dsi);
+	if (err < 0) {
+		drm_panel_remove(&pinfo->base);
+		return err;
+	}
+
+	return 0;
 }
 
 static int nt36672a_panel_remove(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
index 3c20beeb1781..3991f5d950af 100644
--- a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
+++ b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
@@ -241,7 +241,13 @@ static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
 	if (ret < 0)
 		return ret;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		wuxga_nt_panel_del(wuxga_nt);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
index a3782830ae3c..1fb579a574d9 100644
--- a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
+++ b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
@@ -199,7 +199,13 @@ static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->lanes = 4;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c
index ea63799ff2a1..29fde3823212 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c
@@ -247,6 +247,7 @@ static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
 	ret = mipi_dsi_attach(dsi);
 	if (ret < 0) {
 		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
+		drm_panel_remove(&ctx->panel);
 		return ret;
 	}
 
diff --git a/drivers/gpu/drm/panel/panel-samsung-sofef00.c b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
index 8cb1853574bb..6d107e14fcc5 100644
--- a/drivers/gpu/drm/panel/panel-samsung-sofef00.c
+++ b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
@@ -302,6 +302,7 @@ static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
 	ret = mipi_dsi_attach(dsi);
 	if (ret < 0) {
 		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
+		drm_panel_remove(&ctx->panel);
 		return ret;
 	}
 
diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
index b937e24dac8e..25829a0a8e80 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -296,7 +296,13 @@ static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
 	if (ret < 0)
 		return ret;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		sharp_nt_panel_del(sharp_nt);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
-- 
2.33.0.685.g46640cef36-goog

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ