component: fix crash on x86_64 with hda audio drivers
Maarten reports that the addition of releasing match data to the
component helper results in a general protection fault on x86_64.
This is caused by the devm resources being freed in reverse order
to their allocation, which caused a use-after-free of the match
array.
Switch the match array to be a more conventional kmalloc/kfree()
affair, explicitly freeing it along with the parent match data
structure.
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: ce657b1cddf1 ("component: add support for releasing match data")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
1 file changed