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| author | Jeff Vander Stoep <jeffv@google.com> | 2016-05-29 14:22:32 -0700 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-10-29 01:34:03 +0200 |
| commit | 87040c3c6003be08c1e10914ae58c2e814359b05 (patch) | |
| tree | 141cd69932d05dc135ea7058df26247dac21ed23 /security | |
| parent | 7aa76215eb3fae8b93f1d0df80fdc9cb203bbb78 (diff) | |
| download | kernel_samsung_tuna-87040c3c6003be08c1e10914ae58c2e814359b05.zip kernel_samsung_tuna-87040c3c6003be08c1e10914ae58c2e814359b05.tar.gz kernel_samsung_tuna-87040c3c6003be08c1e10914ae58c2e814359b05.tar.bz2 | |
FROMLIST: security,perf: Allow further restriction of perf_event_open
When kernel.perf_event_open is set to 3 (or greater), disallow all
access to performance events by users without CAP_SYS_ADMIN.
Add a Kconfig symbol CONFIG_SECURITY_PERF_EVENTS_RESTRICT that
makes this value the default.
This is based on a similar feature in grsecurity
(CONFIG_GRKERNSEC_PERF_HARDEN). This version doesn't include making
the variable read-only. It also allows enabling further restriction
at run-time regardless of whether the default is changed.
https://lkml.org/lkml/2016/1/11/587
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Bug: 29054680
Change-Id: Iff5bff4fc1042e85866df9faa01bce8d04335ab8
Diffstat (limited to 'security')
| -rw-r--r-- | security/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/security/Kconfig b/security/Kconfig index f76afcc..f24d69e 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -82,6 +82,15 @@ config SECURITY_DMESG_RESTRICT If you are unsure how to answer this question, answer N. +config SECURITY_PERF_EVENTS_RESTRICT + bool "Restrict unprivileged use of performance events" + depends on PERF_EVENTS + help + If you say Y here, the kernel.perf_event_paranoid sysctl + will be set to 3 by default, and no unprivileged use of the + perf_event_open syscall will be permitted unless it is + changed. + config SECURITY bool "Enable different security models" depends on SYSFS |