Both the EVM HMAC and signature xattr formats are file system specific and can not be copied from one filesystem to another. EVM differentiates files without any xattrs (INTEGRITY_UNKNOWN) from those having protected xattrs (INTEGRITY_NOLABEL). This patch treats the rootfs filesystem as a special case, returning INTEGRITY_UNKNOWN. Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx> --- security/integrity/evm/evm_main.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index b392fe6..9c71af7 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -128,11 +128,16 @@ static enum integrity_status evm_verify_hmac(struct dentry *dentry, if (rc <= 0) { evm_status = INTEGRITY_FAIL; if (rc == -ENODATA) { + struct super_block *sb = dentry->d_inode->i_sb; + rc = evm_find_protected_xattrs(dentry); - if (rc > 0) - evm_status = INTEGRITY_NOLABEL; - else if (rc == 0) + if (rc == 0) evm_status = INTEGRITY_NOXATTRS; /* new file */ + else if (rc > 0 && sb->s_magic == TMPFS_MAGIC + && strcmp(sb->s_id, "rootfs") == 0) + evm_status = INTEGRITY_UNKNOWN; + else if (rc > 0) + evm_status = INTEGRITY_NOLABEL; } else if (rc == -EOPNOTSUPP) { evm_status = INTEGRITY_UNKNOWN; } -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe initramfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html