FM / attr

/proc/168/task/168/attr

Name	Mode	Actions
current	0666	edit dl rm
exec	0666	edit dl rm
fscreate	0666	edit dl rm
keycreate	0666	edit dl rm
prev	0444	edit dl rm
sockcreate	0666	edit dl rm

Edit: /proc/168/task/168/attr/prev (0B)