The ub913 and ub953 drivers call fwnode_handle_put(priv->sd.fwnode) as
part of their remove process, and if the driver is removed multiple
times, eventually leads to put "overflow", possibly causing memory
corruption or crash.
The fwnode_handle_put() is a leftover from commit 905f88ccebb1 ("media:
i2c: ds90ub9x3: Fix sub-device matching"), which changed the code
related to the sd.fwnode, but missed removing these fwnode_handle_put()
calls.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 905f88ccebb1 ("media: i2c: ds90ub9x3: Fix sub-device matching")
---
drivers/media/i2c/ds90ub913.c | 1 -
drivers/media/i2c/ds90ub953.c | 1 -
2 files changed, 2 deletions(-)
diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
index 8eed4a200fd8..b5375d736629 100644
--- a/drivers/media/i2c/ds90ub913.c
+++ b/drivers/media/i2c/ds90ub913.c
@@ -793,7 +793,6 @@ static void ub913_subdev_uninit(struct ub913_data *priv)
v4l2_async_unregister_subdev(&priv->sd);
ub913_v4l2_nf_unregister(priv);
v4l2_subdev_cleanup(&priv->sd);
- fwnode_handle_put(priv->sd.fwnode);
media_entity_cleanup(&priv->sd.entity);
}
diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c
index 16f88db14981..10daecf6f457 100644
--- a/drivers/media/i2c/ds90ub953.c
+++ b/drivers/media/i2c/ds90ub953.c
@@ -1291,7 +1291,6 @@ static void ub953_subdev_uninit(struct ub953_data *priv)
v4l2_async_unregister_subdev(&priv->sd);
ub953_v4l2_notifier_unregister(priv);
v4l2_subdev_cleanup(&priv->sd);
- fwnode_handle_put(priv->sd.fwnode);
media_entity_cleanup(&priv->sd.entity);
}
--
2.43.0
