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| author |   David Howells <dhowells@redhat.com> | 2019-06-26 21:02:32 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2019-06-26 21:02:32 +0100 |
| commit | 0f44e4d976f96c6439da0d6717238efa4b91196e (patch) | |
| tree | 3cec4bc4ef3faa4e61058e3aff066a7bec1c9d37 /security/keys/internal.h | |
| parent | keys: Namespace keyring names (diff) | |
| download | linux-dev-0f44e4d976f96c6439da0d6717238efa4b91196e.tar.xz linux-dev-0f44e4d976f96c6439da0d6717238efa4b91196e.zip | |
keys: Move the user and user-session keyrings to the user_namespace
Move the user and user-session keyrings to the user_namespace struct rather
than pinning them from the user_struct struct. This prevents these
keyrings from propagating across user-namespaces boundaries with regard to
the KEY_SPEC_* flags, thereby making them more useful in a containerised
environment.
The issue is that a single user_struct may be represent UIDs in several
different namespaces.
The way the patch does this is by attaching a 'register keyring' in each
user_namespace and then sticking the user and user-session keyrings into
that. It can then be searched to retrieve them.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jann Horn <jannh@google.com>
Diffstat (limited to 'security/keys/internal.h')
| -rw-r--r-- | security/keys/internal.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/security/keys/internal.h b/security/keys/internal.h index aa361299a3ec..d3a9439e2386 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -148,7 +148,8 @@ extern key_ref_t search_process_keyrings_rcu(struct keyring_search_context *ctx) extern struct key *find_keyring_by_name(const char *name, bool uid_keyring); -extern int install_user_keyrings(void); +extern int look_up_user_keyrings(struct key **, struct key **); +extern struct key *get_user_session_keyring_rcu(const struct cred *); extern int install_thread_keyring_to_cred(struct cred *); extern int install_process_keyring_to_cred(struct cred *); extern int install_session_keyring_to_cred(struct cred *, struct key *); |