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| author | David Howells <dhowells@redhat.com> | 2008-04-29 12:01:31 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 19:06:17 +0400 |
| commit | 69664cf16af4f31cd54d77948a4baf9c7e0ca7b9 (patch) | |
| tree | 3ff4ecae21c140a2beed25cfa9e55b788f9814ac /security/keys/internal.h | |
| parent | 6b79ccb5144f9ffb4d4596c23e7570238dd12abc (diff) | |
| download | linux-69664cf16af4f31cd54d77948a4baf9c7e0ca7b9.tar.xz | |
keys: don't generate user and user session keyrings unless they're accessed
Don't generate the per-UID user and user session keyrings unless they're
explicitly accessed. This solves a problem during a login process whereby
set*uid() is called before the SELinux PAM module, resulting in the per-UID
keyrings having the wrong security labels.
This also cures the problem of multiple per-UID keyrings sometimes appearing
due to PAM modules (including pam_keyinit) setuiding and causing user_structs
to come into and go out of existence whilst the session keyring pins the user
keyring. This is achieved by first searching for extant per-UID keyrings
before inventing new ones.
The serial bound argument is also dropped from find_keyring_by_name() as it's
not currently made use of (setting it to 0 disables the feature).
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <kwc@citi.umich.edu>
Cc: <arunsr@cse.iitk.ac.in>
Cc: <dwalsh@redhat.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/keys/internal.h')
| -rw-r--r-- | security/keys/internal.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/security/keys/internal.h b/security/keys/internal.h index 6361d3736dbc..2ab38854c47f 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -77,8 +77,6 @@ extern struct mutex key_construction_mutex; extern wait_queue_head_t request_key_conswq; -extern void keyring_publish_name(struct key *keyring); - extern int __key_link(struct key *keyring, struct key *key); extern key_ref_t __keyring_search_one(key_ref_t keyring_ref, @@ -102,7 +100,7 @@ extern key_ref_t search_process_keyrings(struct key_type *type, key_match_func_t match, struct task_struct *tsk); -extern struct key *find_keyring_by_name(const char *name, key_serial_t bound); +extern struct key *find_keyring_by_name(const char *name, bool skip_perm_check); extern int install_thread_keyring(struct task_struct *tsk); extern int install_process_keyring(struct task_struct *tsk); |