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Subject: media: intel/ipu6: add csi2 port sanity check in notifier bound
Author: Bingbu Cao <bingbu....@intel.com>
Date: Wed May 29 14:43:21 2024 +0800
Invalid csi2 port will break the isys notifier bound ops as it is
trying to access an invalid csi2 sub-device instance based on the
port. It will trigger a mc warning, and it will cause the sensor
driver to unbound an inexistent isys csi2 and crash. Adding a
csi2 port sanity check, return error to avoid such case.
Fixes: f50c4ca0a820 ("media: intel/ipu6: add the main input system driver")
Signed-off-by: Bingbu Cao <bingbu....@intel.com>
[Sakari Ailus: Fix spelling of "nports" field.]
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/pci/intel/ipu6/ipu6-isys.c | 6 ++++++
1 file changed, 6 insertions(+)
---
diff --git a/drivers/media/pci/intel/ipu6/ipu6-isys.c
b/drivers/media/pci/intel/ipu6/ipu6-isys.c
index 1998b72ac07d..8b9b77719bb1 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-isys.c
+++ b/drivers/media/pci/intel/ipu6/ipu6-isys.c
@@ -678,6 +678,12 @@ static int isys_notifier_bound(struct v4l2_async_notifier
*notifier,
container_of(asc, struct sensor_async_sd, asc);
int ret;
+ if (s_asd->csi2.port >= isys->pdata->ipdata->csi2.nports) {
+ dev_err(&isys->adev->auxdev.dev, "invalid csi2 port %u\n",
+ s_asd->csi2.port);
+ return -EINVAL;
+ }
+
ret = ipu_bridge_instantiate_vcm(sd->dev);
if (ret) {
dev_err(&isys->adev->auxdev.dev, "instantiate vcm failed\n");
