[PATCH 5.15 20/57] Input: synaptics-rmi4 - fail probing if memory allocation for "phys" fails

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kunwu Chan <chentao@kylinos.cn>

[ Upstream commit bc4996184d56cfaf56d3811ac2680c8a0e2af56e ]

While input core can work with input->phys set to NULL userspace might
depend on it, so better fail probing if allocation fails. The system must
be in a pretty bad shape for it to happen anyway.

Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240117073124.143636-1-chentao@kylinos.cn
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/input/rmi4/rmi_driver.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index 258d5fe3d395c..aa32371f04af6 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -1196,7 +1196,11 @@ static int rmi_driver_probe(struct device *dev)
 		}
 		rmi_driver_set_input_params(rmi_dev, data->input);
 		data->input->phys = devm_kasprintf(dev, GFP_KERNEL,
-						"%s/input0", dev_name(dev));
+						   "%s/input0", dev_name(dev));
+		if (!data->input->phys) {
+			retval = -ENOMEM;
+			goto err;
+		}
 	}
 
 	retval = rmi_init_functions(data);
-- 
2.43.0