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userns: Teach security_path_chown to take kuids and kgids

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Don't make the security modules deal with raw user space uid and
gids instead pass in a kuid_t and a kgid_t so that security modules
only have to deal with internal kernel uids and gids.

Cc: Al Viro <[email protected]>
Cc: James Morris <[email protected]>
Cc: John Johansen <[email protected]>
Cc: Kentaro Takeda <[email protected]>
Cc: Tetsuo Handa <[email protected]>
Acked-by: Serge Hallyn <[email protected]>
Signed-off-by: Eric W. Biederman <[email protected]>
This commit is contained in:
Eric W. Biederman 2012-06-01 16:14:19 -06:00
commit d2b31ca644
6 changed files with 14 additions and 12 deletions
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12
security/tomoyo/tomoyo.c
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@ -373,13 +373,15 @@ static int tomoyo_path_chmod(struct path *path, umode_t mode)
*
* Returns 0 on success, negative value otherwise.
*/
static int tomoyo_path_chown(struct path *path, uid_t uid, gid_t gid)
static int tomoyo_path_chown(struct path *path, kuid_t uid, kgid_t gid)
{
int error = 0;
if (uid != (uid_t) -1)
error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path, uid);
if (!error && gid != (gid_t) -1)
error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path, gid);
if (uid_valid(uid))
error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path,
from_kuid(&init_user_ns, uid));
if (!error && gid_valid(gid))
error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path,
from_kgid(&init_user_ns, gid));
return error;
}