diff options
| author | David Howells <dhowells@redhat.com> | 2019-08-20 03:18:00 +0300 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2019-08-20 07:54:16 +0300 |
| commit | b0c8fdc7fdb77586c3d1937050925b960743306e (patch) | |
| tree | bdd70cb78f6630c2e98a06aaae45600fcbb03f89 /security/lockdown | |
| parent | 9d1f8be5cf42b497a3bddf1d523f2bb142e9318c (diff) | |
| download | linux-b0c8fdc7fdb77586c3d1937050925b960743306e.tar.xz | |
lockdown: Lock down perf when in confidentiality mode
Disallow the use of certain perf facilities that might allow userspace to
access kernel data.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Garrett <mjg59@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/lockdown')
| -rw-r--r-- | security/lockdown/lockdown.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c index 2397772c56bd..3d7b1039457b 100644 --- a/security/lockdown/lockdown.c +++ b/security/lockdown/lockdown.c @@ -34,6 +34,7 @@ static char *lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = { [LOCKDOWN_KCORE] = "/proc/kcore access", [LOCKDOWN_KPROBES] = "use of kprobes", [LOCKDOWN_BPF_READ] = "use of bpf to read kernel RAM", + [LOCKDOWN_PERF] = "unsafe use of perf", [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality", }; |