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authorMimi Zohar <zohar@linux.vnet.ibm.com>2015-11-10 15:00:38 +0100
committerMimi Zohar <zohar@linux.vnet.ibm.com>2015-12-15 16:01:43 +0100
commit501f1bde66525f94403a5b78832a9218ef9b1c14 (patch)
tree545dfefd2c92a70ece125a4a0625190e97972cdf
parentKEYS: prevent keys from being removed from specified keyrings (diff)
downloadlinux-501f1bde66525f94403a5b78832a9218ef9b1c14.tar.xz
linux-501f1bde66525f94403a5b78832a9218ef9b1c14.zip
IMA: prevent keys on the .ima_blacklist from being removed
Set the KEY_FLAGS_KEEP on the .ima_blacklist to prevent userspace from removing keys from the keyring. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
-rw-r--r--security/integrity/ima/ima_mok.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_mok.c b/security/integrity/ima/ima_mok.c
index 18e37f57f512..8dad9a2b8e47 100644
--- a/security/integrity/ima/ima_mok.c
+++ b/security/integrity/ima/ima_mok.c
@@ -47,7 +47,9 @@ __init int ima_mok_init(void)
if (IS_ERR(ima_mok_keyring) || IS_ERR(ima_blacklist_keyring))
panic("Can't allocate IMA MOK or blacklist keyrings.");
set_bit(KEY_FLAG_TRUSTED_ONLY, &ima_mok_keyring->flags);
+
set_bit(KEY_FLAG_TRUSTED_ONLY, &ima_blacklist_keyring->flags);
+ set_bit(KEY_FLAG_KEEP, &ima_blacklist_keyring->flags);
return 0;
}