tree 86b2e1acc2014eea41ceb006e17459b0878bd764
parent 5496197f9b084f086cb410dd566648b0896fcc74
author Matthew Garrett <matthewgarrett@google.com> 1566260283 -0700
committer James Morris <jmorris@namei.org> 1566276857 -0700

tracefs: Restrict tracefs when the kernel is locked down

Tracefs may release more information about the kernel than desirable, so
restrict it when the kernel is locked down in confidentiality mode by
preventing open().

(Fixed by Ben Hutchings to avoid a null dereference in
default_file_open())

Signed-off-by: Matthew Garrett <mjg59@google.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: James Morris <jmorris@namei.org>