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userns: Convert audit to work with user namespaces enabled

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- Explicitly format uids gids in audit messges in the initial user
  namespace. This is safe because auditd is restrected to be in
  the initial user namespace.

- Convert audit_sig_uid into a kuid_t.

- Enable building the audit code and user namespaces at the same time.

The net result is that the audit subsystem now uses kuid_t and kgid_t whenever
possible making it almost impossible to confuse a raw uid_t with a kuid_t
preventing bugs.

Cc: Al Viro <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Eric W. Biederman <[email protected]>
This commit is contained in:
Eric W. Biederman 2012-02-07 16:53:48 -08:00
commit cca080d9b6
5 changed files with 37 additions and 27 deletions
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5
drivers/tty/tty_audit.c
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@ -69,11 +69,12 @@ static void tty_audit_log(const char *description, struct task_struct *tsk,
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
if (ab) {
char name[sizeof(tsk->comm)];
uid_t uid = task_uid(tsk);
kuid_t uid = task_uid(tsk);
audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u "
"major=%d minor=%d comm=", description,
tsk->pid, uid,
tsk->pid,
from_kuid(&init_user_ns, uid),
from_kuid(&init_user_ns, loginuid),
sessionid,
major, minor);