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-rw-r--r--security/integrity/evm/evm_main.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index c5ee1a7c5e8a..f589c9a05da2 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -162,9 +162,14 @@ static enum integrity_status evm_verify_hmac(struct dentry *dentry,
(const char *)xattr_data, xattr_len,
calc.digest, sizeof(calc.digest));
if (!rc) {
- /* we probably want to replace rsa with hmac here */
- evm_update_evmxattr(dentry, xattr_name, xattr_value,
- xattr_value_len);
+ /* Replace RSA with HMAC if not mounted readonly and
+ * not immutable
+ */
+ if (!IS_RDONLY(dentry->d_inode) &&
+ !IS_IMMUTABLE(dentry->d_inode))
+ evm_update_evmxattr(dentry, xattr_name,
+ xattr_value,
+ xattr_value_len);
}
break;
default:

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