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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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2
kernel/audit.h
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@ -146,7 +146,7 @@ extern void audit_kill_trees(struct list_head *);
extern char *audit_unpack_string(void **, size_t *, size_t);
extern pid_t audit_sig_pid;
extern uid_t audit_sig_uid;
extern kuid_t audit_sig_uid;
extern u32 audit_sig_sid;
#ifdef CONFIG_AUDITSYSCALL