Commit df35c59c authored by Daniel Micay's avatar Daniel Micay Committed by gitbuildkicker
Browse files

add a property for controlling perf_event_paranoid

This adds a system property for controlling unprivileged access to
perf_event_paranoid. It depends on adding kernel support for
perf_event_paranoid=3 based on grsecurity's PERF_HARDEN feature to
completely disable unprivileged access to perf. A minimal port of this
feature is used in the vanilla Debian kernel by default.

It hides the non-hardened value as an implementation detail, since while
it is currently 1, it will probably become 2 in the future.

(Cherry picked from commit 2b22a663)

Bug: 29054680

Change-Id: I6e3ae3cf18d8c76df94f879c34fb6fde519b89a9
(cherry picked from commit d4421f19)
parent e30579f3
......@@ -544,6 +544,11 @@ on property:sys.sysctl.extra_free_kbytes=*
on property:sys.sysctl.tcp_def_init_rwnd=*
write /proc/sys/net/ipv4/tcp_default_init_rwnd ${sys.sysctl.tcp_def_init_rwnd}
on property:security.perf_harden=0
write /proc/sys/kernel/perf_event_paranoid 1
on property:security.perf_harden=1
write /proc/sys/kernel/perf_event_paranoid 3
## Daemon processes to be run by init.
##
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment