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Diffstat (limited to 'security/keys/keyctl.c')
-rw-r--r--security/keys/keyctl.c52
1 files changed, 30 insertions, 22 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 6d9d0c74752..4b5c948eb41 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -579,8 +579,8 @@ okay:
ret = snprintf(tmpbuf, PAGE_SIZE - 1,
"%s;%d;%d;%08x;%s",
key->type->name,
- key->uid,
- key->gid,
+ from_kuid_munged(current_user_ns(), key->uid),
+ from_kgid_munged(current_user_ns(), key->gid),
key->perm,
key->description ?: "");
@@ -776,15 +776,25 @@ error:
*
* If successful, 0 will be returned.
*/
-long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
+long keyctl_chown_key(key_serial_t id, uid_t user, gid_t group)
{
struct key_user *newowner, *zapowner = NULL;
struct key *key;
key_ref_t key_ref;
long ret;
+ kuid_t uid;
+ kgid_t gid;
+
+ uid = make_kuid(current_user_ns(), user);
+ gid = make_kgid(current_user_ns(), group);
+ ret = -EINVAL;
+ if ((user != (uid_t) -1) && !uid_valid(uid))
+ goto error;
+ if ((group != (gid_t) -1) && !gid_valid(gid))
+ goto error;
ret = 0;
- if (uid == (uid_t) -1 && gid == (gid_t) -1)
+ if (user == (uid_t) -1 && group == (gid_t) -1)
goto error;
key_ref = lookup_user_key(id, KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL,
@@ -802,27 +812,27 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
if (!capable(CAP_SYS_ADMIN)) {
/* only the sysadmin can chown a key to some other UID */
- if (uid != (uid_t) -1 && key->uid != uid)
+ if (user != (uid_t) -1 && !uid_eq(key->uid, uid))
goto error_put;
/* only the sysadmin can set the key's GID to a group other
* than one of those that the current process subscribes to */
- if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid))
+ if (group != (gid_t) -1 && !gid_eq(gid, key->gid) && !in_group_p(gid))
goto error_put;
}
/* change the UID */
- if (uid != (uid_t) -1 && uid != key->uid) {
+ if (user != (uid_t) -1 && !uid_eq(uid, key->uid)) {
ret = -ENOMEM;
- newowner = key_user_lookup(uid, current_user_ns());
+ newowner = key_user_lookup(uid);
if (!newowner)
goto error_put;
/* transfer the quota burden to the new user */
if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) {
- unsigned maxkeys = (uid == 0) ?
+ unsigned maxkeys = uid_eq(uid, GLOBAL_ROOT_UID) ?
key_quota_root_maxkeys : key_quota_maxkeys;
- unsigned maxbytes = (uid == 0) ?
+ unsigned maxbytes = uid_eq(uid, GLOBAL_ROOT_UID) ?
key_quota_root_maxbytes : key_quota_maxbytes;
spin_lock(&newowner->lock);
@@ -856,7 +866,7 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
}
/* change the GID */
- if (gid != (gid_t) -1)
+ if (group != (gid_t) -1)
key->gid = gid;
ret = 0;
@@ -907,7 +917,7 @@ long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
down_write(&key->sem);
/* if we're not the sysadmin, we can only change a key that we own */
- if (capable(CAP_SYS_ADMIN) || key->uid == current_fsuid()) {
+ if (capable(CAP_SYS_ADMIN) || uid_eq(key->uid, current_fsuid())) {
key->perm = perm;
ret = 0;
}
@@ -1497,7 +1507,6 @@ long keyctl_session_to_parent(void)
oldwork = NULL;
parent = me->real_parent;
- task_lock(parent);
/* the parent mustn't be init and mustn't be a kernel thread */
if (parent->pid <= 1 || !parent->mm)
goto unlock;
@@ -1518,18 +1527,18 @@ long keyctl_session_to_parent(void)
/* the parent must have the same effective ownership and mustn't be
* SUID/SGID */
- if (pcred->uid != mycred->euid ||
- pcred->euid != mycred->euid ||
- pcred->suid != mycred->euid ||
- pcred->gid != mycred->egid ||
- pcred->egid != mycred->egid ||
- pcred->sgid != mycred->egid)
+ if (!uid_eq(pcred->uid, mycred->euid) ||
+ !uid_eq(pcred->euid, mycred->euid) ||
+ !uid_eq(pcred->suid, mycred->euid) ||
+ !gid_eq(pcred->gid, mycred->egid) ||
+ !gid_eq(pcred->egid, mycred->egid) ||
+ !gid_eq(pcred->sgid, mycred->egid))
goto unlock;
/* the keyrings must have the same UID */
if ((pcred->session_keyring &&
- pcred->session_keyring->uid != mycred->euid) ||
- mycred->session_keyring->uid != mycred->euid)
+ !uid_eq(pcred->session_keyring->uid, mycred->euid)) ||
+ !uid_eq(mycred->session_keyring->uid, mycred->euid))
goto unlock;
/* cancel an already pending keyring replacement */
@@ -1541,7 +1550,6 @@ long keyctl_session_to_parent(void)
if (!ret)
newwork = NULL;
unlock:
- task_unlock(parent);
write_unlock_irq(&tasklist_lock);
rcu_read_unlock();
if (oldwork)