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authorHans de Goede <hdegoede@redhat.com>2020-03-14 16:10:47 +0100
committerHans de Goede <hdegoede@redhat.com>2020-03-14 16:10:47 +0100
commit07ae1e1270df69c76c7117b64c38bd7a574444e1 (patch)
tree6d7eeeb8ab4864a314f125c141cbc8138877ef03
parent45f76820a091b444de7b3dfcea2c3f09056c60b9 (diff)
downloadkernel-07ae1e1270df69c76c7117b64c38bd7a574444e1.tar.gz
kernel-07ae1e1270df69c76c7117b64c38bd7a574444e1.tar.xz
kernel-07ae1e1270df69c76c7117b64c38bd7a574444e1.zip
Fix UCSI oopses (rhbz 1785972)
-rw-r--r--kernel.spec8
-rw-r--r--ucsi-oops-fixes.patch264
2 files changed, 271 insertions, 1 deletions
diff --git a/kernel.spec b/kernel.spec
index 6d3aea008..14cf131dc 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -871,9 +871,12 @@ Patch511: v2_20200128_dmoulding_me_com.patch
# Submitted upstream
Patch512: iommu-WARN_TAINT-fixes.patch
-# Fix some HP x360 models not booting (rhbz 1790115)
+# Fix some HP x360 models not booting (rhbz 1790115) (in mainline now)
Patch513: 0001-driver-code-clarify-and-fix-platform-device-DMA-mask.patch
+# Fix UCSI oopses, (rhbz 1785972) (in gkh's usb-linus, heading towards mainline)
+Patch514: ucsi-oops-fixes.patch
+
# END OF PATCH DEFINITIONS
%endif
@@ -2903,6 +2906,9 @@ fi
#
#
%changelog
+* Sat Mar 14 2020 Hans de Goede <hdegoede@redhat.com>
+- Fix UCSI oopses (rhbz 1785972)
+
* Fri Mar 13 2020 Hans de Goede <hdegoede@redhat.com>
- Fix some HP x360 models not booting (rhbz 1790115)
diff --git a/ucsi-oops-fixes.patch b/ucsi-oops-fixes.patch
new file mode 100644
index 000000000..67c1ab4f2
--- /dev/null
+++ b/ucsi-oops-fixes.patch
@@ -0,0 +1,264 @@
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+From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Cc: Hans de Goede <hdegoede@redhat.com>,
+ linux-usb@vger.kernel.org,
+ stable@vger.kernel.org
+Subject: [PATCH 1/2] usb: typec: ucsi: displayport: Fix NULL pointer dereference
+Date: Wed, 11 Mar 2020 16:00:05 +0300
+Message-Id: <20200311130006.41288-2-heikki.krogerus@linux.intel.com>
+In-Reply-To: <20200311130006.41288-1-heikki.krogerus@linux.intel.com>
+References: <20200311130006.41288-1-heikki.krogerus@linux.intel.com>
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+
+If the registration of the DisplayPort was not successful,
+or if the port does not support DisplayPort alt mode in the
+first place, the function ucsi_displayport_remove_partner()
+will fail with NULL pointer dereference when it attempts to
+access the driver data.
+
+Adding a check to the function to make sure there really is
+driver data for the device before modifying it.
+
+Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
+Reported-by: Andrea Gagliardi La Gala <andrea.lagala@gmail.com>
+BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=3D206365
+Cc: stable@vger.kernel.org
+Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+---
+ drivers/usb/typec/ucsi/displayport.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/=
+displayport.c
+index 0f1273ae086c..261131c9e37c 100644
+--- a/drivers/usb/typec/ucsi/displayport.c
++++ b/drivers/usb/typec/ucsi/displayport.c
+@@ -271,6 +271,9 @@ void ucsi_displayport_remove_partner(struct typec_altmo=
+de *alt)
+ =09=09return;
+=20
+ =09dp =3D typec_altmode_get_drvdata(alt);
++=09if (!dp)
++=09=09return;
++
+ =09dp->data.conf =3D 0;
+ =09dp->data.status =3D 0;
+ =09dp->initialized =3D false;
+--=20
+2.25.1
+
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+From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Cc: Hans de Goede <hdegoede@redhat.com>,
+ linux-usb@vger.kernel.org,
+ stable@vger.kernel.org
+Subject: [PATCH 2/2] usb: typec: ucsi: displayport: Fix a potential race during registration
+Date: Wed, 11 Mar 2020 16:00:06 +0300
+Message-Id: <20200311130006.41288-3-heikki.krogerus@linux.intel.com>
+In-Reply-To: <20200311130006.41288-1-heikki.krogerus@linux.intel.com>
+References: <20200311130006.41288-1-heikki.krogerus@linux.intel.com>
+MIME-Version: 1.0
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+
+Locking the connector in ucsi_register_displayport() to make
+sure that nothing can access the displayport alternate mode
+before the function has finished and the alternate mode is
+actually ready.
+
+Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
+Cc: stable@vger.kernel.org
+Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+---
+ drivers/usb/typec/ucsi/displayport.c | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/=
+displayport.c
+index 261131c9e37c..048381c058a5 100644
+--- a/drivers/usb/typec/ucsi/displayport.c
++++ b/drivers/usb/typec/ucsi/displayport.c
+@@ -288,6 +288,8 @@ struct typec_altmode *ucsi_register_displayport(struct =
+ucsi_connector *con,
+ =09struct typec_altmode *alt;
+ =09struct ucsi_dp *dp;
+=20
++=09mutex_lock(&con->lock);
++
+ =09/* We can't rely on the firmware with the capabilities. */
+ =09desc->vdo |=3D DP_CAP_DP_SIGNALING | DP_CAP_RECEPTACLE;
+=20
+@@ -296,12 +298,15 @@ struct typec_altmode *ucsi_register_displayport(struc=
+t ucsi_connector *con,
+ =09desc->vdo |=3D all_assignments << 16;
+=20
+ =09alt =3D typec_port_register_altmode(con->port, desc);
+-=09if (IS_ERR(alt))
++=09if (IS_ERR(alt)) {
++=09=09mutex_unlock(&con->lock);
+ =09=09return alt;
++=09}
+=20
+ =09dp =3D devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL);
+ =09if (!dp) {
+ =09=09typec_unregister_altmode(alt);
++=09=09mutex_unlock(&con->lock);
+ =09=09return ERR_PTR(-ENOMEM);
+ =09}
+=20
+@@ -314,5 +319,7 @@ struct typec_altmode *ucsi_register_displayport(struct =
+ucsi_connector *con,
+ =09alt->ops =3D &ucsi_displayport_ops;
+ =09typec_altmode_set_drvdata(alt, dp);
+=20
++=09mutex_unlock(&con->lock);
++
+ =09return alt;
+ }
+--=20
+2.25.1
+