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| author | Serge E. Hallyn <serue@us.ibm.com> | 2009-02-26 18:27:47 -0600 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-02-27 12:35:09 +1100 |
| commit | 8ff3bc3138a400294ee9e126ac75fc9a9fae4e0b (patch) | |
| tree | f1e2f21f17268cb9a88446da2f1ced9dbccd5138 /security | |
| parent | 1d1e97562e5e2ac60fb7b25437ba619f95f67fab (diff) | |
| download | lwn-8ff3bc3138a400294ee9e126ac75fc9a9fae4e0b.tar.gz lwn-8ff3bc3138a400294ee9e126ac75fc9a9fae4e0b.zip | |
keys: consider user namespace in key_permission
If a key is owned by another user namespace, then treat the
key as though it is owned by both another uid and gid.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/permission.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/keys/permission.c b/security/keys/permission.c index 5d9fc7b93f2e..0ed802c9e698 100644 --- a/security/keys/permission.c +++ b/security/keys/permission.c @@ -35,6 +35,9 @@ int key_task_permission(const key_ref_t key_ref, const struct cred *cred, key = key_ref_to_ptr(key_ref); + if (key->user->user_ns != cred->user->user_ns) + goto use_other_perms; + /* use the second 8-bits of permissions for keys the caller owns */ if (key->uid == cred->fsuid) { kperm = key->perm >> 16; @@ -56,6 +59,8 @@ int key_task_permission(const key_ref_t key_ref, const struct cred *cred, } } +use_other_perms: + /* otherwise use the least-significant 8-bits */ kperm = key->perm; |