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[HID,3/3] HID: nvidia-shield: Reference hid_device devm allocation of input_dev name

Message ID 20230824061308.222021-4-sergeantsagara@protonmail.com (mailing list archive)
State New
Delegated to: Jiri Kosina
Headers show
Series Fix devm references used in HID drivers when allocating input_dev name | expand

Commit Message

Rahul Rameshbabu Aug. 24, 2023, 6:14 a.m. UTC 
From: Rahul Rameshbabu <rrameshbabu@nvidia.com>

Use hid_device for devm allocation of the input_dev name to avoid a
use-after-free. input_unregister_device would trigger devres cleanup of all
resources associated with the input_dev, free-ing the name. The name would
subsequently be used in a uevent fired at the end of unregistering the
input_dev.

Reported-by: Maxime Ripard <mripard@kernel.org>
Closes: https://lore.kernel.org/linux-input/ZOZIZCND+L0P1wJc@penguin/T/#m443f3dce92520f74b6cf6ffa8653f9c92643d4ae
Fixes: 09308562d4af ("HID: nvidia-shield: Initial driver implementation with Thunderstrike support")
Suggested-by: Maxime Ripard <mripard@kernel.org>
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
---
 drivers/hid/hid-nvidia-shield.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/hid/hid-nvidia-shield.c b/drivers/hid/hid-nvidia-shield.c
index a928ad2be62d..084179a6be86 100644
--- a/drivers/hid/hid-nvidia-shield.c
+++ b/drivers/hid/hid-nvidia-shield.c
@@ -164,7 +164,7 @@  static struct input_dev *shield_allocate_input_dev(struct hid_device *hdev,
 	idev->id.product = hdev->product;
 	idev->id.version = hdev->version;
 	idev->uniq = hdev->uniq;
-	idev->name = devm_kasprintf(&idev->dev, GFP_KERNEL, "%s %s", hdev->name,
+	idev->name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s %s", hdev->name,
 				    name_suffix);
 	if (!idev->name)
 		goto err_name;