[PATCH 01/13] Input: adp5589-keys: fix NULL pointer dereference
From: Nuno Sa <nuno.sa@analog.com>
Date: 2024-10-01 13:37:54
Also in:
linux-devicetree
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
We register a devm action to call adp5589_clear_config() and then pass
the i2c client as argument so that we can call i2c_get_clientdata() in
order to get our device object. However, i2c_set_clientdata() is only
being set at the end of the probe function which means that we'll get a
NULL pointer dereference in case the probe function fails early.
Fixes: 30df385e35a4 ("Input: adp5589-keys - use devm_add_action_or_reset() for register clear")
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
---
drivers/input/keyboard/adp5589-keys.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c
index 8996e00cd63a8203ec53d46ccb922c21ddb47355..68a29d67be57fc22088a912694e3e6e16e46d956 100644
--- a/drivers/input/keyboard/adp5589-keys.c
+++ b/drivers/input/keyboard/adp5589-keys.c@@ -936,10 +936,9 @@ static int adp5589_keypad_add(struct adp5589_kpad *kpad, unsigned int revid) static void adp5589_clear_config(void *data) { - struct i2c_client *client = data; - struct adp5589_kpad *kpad = i2c_get_clientdata(client); + struct adp5589_kpad *kpad = data; - adp5589_write(client, kpad->var->reg(ADP5589_GENERAL_CFG), 0); + adp5589_write(kpad->client, kpad->var->reg(ADP5589_GENERAL_CFG), 0); } static int adp5589_probe(struct i2c_client *client)
@@ -983,7 +982,7 @@ static int adp5589_probe(struct i2c_client *client) } error = devm_add_action_or_reset(&client->dev, adp5589_clear_config, - client); + kpad); if (error) return error;
@@ -1010,8 +1009,6 @@ static int adp5589_probe(struct i2c_client *client) if (error) return error; - i2c_set_clientdata(client, kpad); - dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq); return 0; }
--
2.46.1