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authorDavid Howells <dhowells@redhat.com>2019-08-20 02:17:57 +0200
committerJames Morris <jmorris@namei.org>2019-08-20 06:54:16 +0200
commit02e935bf5b34edcc4cb0dc532dd0e1a1bfb33b51 (patch)
treed1029d3f5dccd6dbba74b1d0b445fa2b5ee4ffb4 /security
parentx86/mmiotrace: Lock down the testmmiotrace module (diff)
downloadlinux-02e935bf5b34edcc4cb0dc532dd0e1a1bfb33b51.tar.xz
linux-02e935bf5b34edcc4cb0dc532dd0e1a1bfb33b51.zip
lockdown: Lock down /proc/kcore
Disallow access to /proc/kcore when the kernel is locked down to prevent access to cryptographic data. This is limited to lockdown confidentiality mode and is still permitted in integrity mode. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Matthew Garrett <mjg59@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/lockdown/lockdown.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 2eadbe0667e7..403b30357f75 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -31,6 +31,7 @@ static char *lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
[LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
[LOCKDOWN_MMIOTRACE] = "unsafe mmio",
[LOCKDOWN_INTEGRITY_MAX] = "integrity",
+ [LOCKDOWN_KCORE] = "/proc/kcore access",
[LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
};