This is a note to let you know that I've just added the patch titled
media: ipu-bridge: Fix null pointer deref on SSDB/PLD parsing warnings
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-ipu-bridge-fix-null-pointer-deref-on-ssdb-pld-.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5a51daefb49e6d45a9fec470f579dea5a493e2f1
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Wed Jul 5 23:29:53 2023 +0200
media: ipu-bridge: Fix null pointer deref on SSDB/PLD parsing warnings
[ Upstream commit 284be5693163343e1cf17c03917eecd1d6681bcf ]
When ipu_bridge_parse_rotation() and ipu_bridge_parse_orientation() run
sensor->adev is not set yet.
So if either of the dev_warn() calls about unknown values are hit this
will lead to a NULL pointer deref.
Set sensor->adev earlier, with a borrowed ref to avoid making unrolling
on errors harder, to fix this.
Fixes: 485aa3df0dff ("media: ipu3-cio2: Parse sensor orientation and rotation")
Cc: Fabian Wüthrich <me@xxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Daniel Scally <dan.scally@xxxxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c
index 3c2accfe54551..7fba87736b6b8 100644
--- a/drivers/media/pci/intel/ipu3/cio2-bridge.c
+++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c
@@ -308,6 +308,11 @@ static int cio2_bridge_connect_sensor(const struct cio2_sensor_config *cfg,
}
sensor = &bridge->sensors[bridge->n_sensors];
+ /*
+ * Borrow our adev ref to the sensor for now, on success
+ * acpi_dev_get(adev) is done further below.
+ */
+ sensor->adev = adev;
ret = cio2_bridge_read_acpi_buffer(adev, "SSDB",
&sensor->ssdb,
