evm: Don't update hmacs in user ns mounts
The kernel should not calculate new hmacs for mounts done by non-root users. Update evm_calc_hmac_or_hash() to refuse to calculate new hmacs for mounts for non-init user namespaces. Cc: linux-integrity@vger.kernel.org Cc: linux-security-module@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: James Morris <james.l.morris@oracle.com> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Cc: "Serge E. Hallyn" <serge@hallyn.com> Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Dongsu Park <dongsu@kinvolk.io> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
parent
6da6c0db53
commit
a3a5c966a6
|
@ -200,7 +200,8 @@ static int evm_calc_hmac_or_hash(struct dentry *dentry,
|
|||
int size;
|
||||
bool ima_present = false;
|
||||
|
||||
if (!(inode->i_opflags & IOP_XATTR))
|
||||
if (!(inode->i_opflags & IOP_XATTR) ||
|
||||
inode->i_sb->s_user_ns != &init_user_ns)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
desc = init_desc(type);
|
||||
|
|
Loading…
Reference in New Issue