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sched: move no_new_privs into new atomic flags

Browse source 
Since seccomp transitions between threads requires updates to the
no_new_privs flag to be atomic, the flag must be part of an atomic flag
set. This moves the nnp flag into a separate task field, and introduces
accessors.

Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Oleg Nesterov <[email protected]>
Reviewed-by: Andy Lutomirski <[email protected]>
This commit is contained in:
Kees Cook 2014-05-21 15:23:46 -07:00
commit 1d4457f999
5 changed files with 22 additions and 10 deletions
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4
security/apparmor/domain.c
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@ -621,7 +621,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
* There is no exception for unconfined as change_hat is not
* available.
*/
if (current->no_new_privs)
if (task_no_new_privs(current))
return -EPERM;
/* released below */
@ -776,7 +776,7 @@ int aa_change_profile(const char *ns_name, const char *hname, bool onexec,
* no_new_privs is set because this aways results in a reduction
* of permissions.
*/
if (current->no_new_privs && !unconfined(profile)) {
if (task_no_new_privs(current) && !unconfined(profile)) {
put_cred(cred);
return -EPERM;
}