diff options
| author |   David Howells <dhowells@redhat.com> | 2019-05-22 14:09:29 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2019-05-29 22:32:05 +0100 |
| commit | 7936d16df9a56c993c23385ea9c2785127f81711 (patch) | |
| tree | d86542e699dc8b41a70c214369dda8f6bbdd8063 /security/keys/keyctl.c | |
| parent | keys: sparse: Fix key_fs[ug]id_changed() (diff) | |
| download | linux-dev-7936d16df9a56c993c23385ea9c2785127f81711.tar.xz linux-dev-7936d16df9a56c993c23385ea9c2785127f81711.zip | |
keys: sparse: Fix incorrect RCU accesses
Fix a pair of accesses that should be using RCU protection.
rcu_dereference_protected() is needed to access task_struct::real_parent.
current_cred() should be used to access current->cred.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Diffstat (limited to '')
| -rw-r--r-- | security/keys/keyctl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index 3e4053a217c3..0f947bcbad46 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -1524,7 +1524,8 @@ long keyctl_session_to_parent(void) ret = -EPERM; oldwork = NULL; - parent = me->real_parent; + parent = rcu_dereference_protected(me->real_parent, + lockdep_is_held(&tasklist_lock)); /* the parent mustn't be init and mustn't be a kernel thread */ if (parent->pid <= 1 || !parent->mm) |