usb: misc: ljca: Fix double free in error handling path

commit 7c96319692 upstream.

When auxiliary_device_add() returns error and then calls
auxiliary_device_uninit(), callback function ljca_auxdev_release
calls kfree(auxdev->dev.platform_data) to free the parameter data
of the function ljca_new_client_device. The callers of
ljca_new_client_device shouldn't call kfree() again
in the error handling path to free the platform data.

Fix this by cleaning up the redundant kfree() in all callers and
adding kfree() the passed in platform_data on errors which happen
before auxiliary_device_init() succeeds .

Fixes: acd6199f19 ("usb: Add support for Intel LJCA device")
Cc: stable <stable@kernel.org>
Signed-off-by: Yongzhi Liu <hyperlyzcs@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240311125748.28198-1-hyperlyzcs@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yongzhi Liu 2024-03-11 20:57:48 +08:00 committed by Greg Kroah-Hartman
parent 19f955ad94
commit 8a9f653cc8
1 changed files with 9 additions and 13 deletions

View File

@ -518,8 +518,10 @@ static int ljca_new_client_device(struct ljca_adapter *adap, u8 type, u8 id,
int ret;
client = kzalloc(sizeof *client, GFP_KERNEL);
if (!client)
if (!client) {
kfree(data);
return -ENOMEM;
}
client->type = type;
client->id = id;
@ -535,8 +537,10 @@ static int ljca_new_client_device(struct ljca_adapter *adap, u8 type, u8 id,
auxdev->dev.release = ljca_auxdev_release;
ret = auxiliary_device_init(auxdev);
if (ret)
if (ret) {
kfree(data);
goto err_free;
}
ljca_auxdev_acpi_bind(adap, auxdev, adr, id);
@ -590,12 +594,8 @@ static int ljca_enumerate_gpio(struct ljca_adapter *adap)
valid_pin[i] = get_unaligned_le32(&desc->bank_desc[i].valid_pins);
bitmap_from_arr32(gpio_info->valid_pin_map, valid_pin, gpio_num);
ret = ljca_new_client_device(adap, LJCA_CLIENT_GPIO, 0, "ljca-gpio",
return ljca_new_client_device(adap, LJCA_CLIENT_GPIO, 0, "ljca-gpio",
gpio_info, LJCA_GPIO_ACPI_ADR);
if (ret)
kfree(gpio_info);
return ret;
}
static int ljca_enumerate_i2c(struct ljca_adapter *adap)
@ -629,10 +629,8 @@ static int ljca_enumerate_i2c(struct ljca_adapter *adap)
ret = ljca_new_client_device(adap, LJCA_CLIENT_I2C, i,
"ljca-i2c", i2c_info,
LJCA_I2C1_ACPI_ADR + i);
if (ret) {
kfree(i2c_info);
if (ret)
return ret;
}
}
return 0;
@ -669,10 +667,8 @@ static int ljca_enumerate_spi(struct ljca_adapter *adap)
ret = ljca_new_client_device(adap, LJCA_CLIENT_SPI, i,
"ljca-spi", spi_info,
LJCA_SPI1_ACPI_ADR + i);
if (ret) {
kfree(spi_info);
if (ret)
return ret;
}
}
return 0;