usb: misc: ljca: Fix double free in error handling path
authorYongzhi Liu <hyperlyzcs@gmail.com>
Mon, 11 Mar 2024 12:57:48 +0000 (20:57 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 26 Mar 2024 10:01:23 +0000 (11:01 +0100)
commit7c9631969287a5366bc8e39cd5abff154b35fb80
tree47f5a1ef55f2851d88b3460b0b0083134ab40f2a
parentf5e9bda03aa50ffad36eccafe893d004ef213c43
usb: misc: ljca: Fix double free in error handling path

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: acd6199f195d ("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>
drivers/usb/misc/usb-ljca.c