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CRED: Separate task security context from task_struct

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Separate the task security context from task_struct.  At this point, the
security data is temporarily embedded in the task_struct with two pointers
pointing to it.

Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in
entry.S via asm-offsets.

With comment fixes Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
David Howells 2008-11-14 10:39:16 +11:00 • committed by James Morris
parent 15a2460ed0
commit b6dff3ec5e
63 changed files with 830 additions and 675 deletions
Download patch file Download diff file Expand all files Collapse all files

16
kernel/signal.c
View file

@ -187,7 +187,7 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
* In order to avoid problems with "switch_user()", we want to make
* sure that the compiler doesn't re-load "t->user"
*/
user = t->user;
user = t->cred->user;
barrier();
atomic_inc(&user->sigpending);
if (override_rlimit ||
@ -582,8 +582,8 @@ static int check_kill_permission(int sig, struct siginfo *info,
uid = current_uid();
euid = current_euid();
if ((euid ^ t->suid) && (euid ^ t->uid) &&
(uid ^ t->suid) && (uid ^ t->uid) &&
if ((euid ^ t->cred->suid) && (euid ^ t->cred->uid) &&
(uid ^ t->cred->suid) && (uid ^ t->cred->uid) &&
!capable(CAP_KILL)) {
switch (sig) {
case SIGCONT:
@ -1100,8 +1100,8 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
goto out_unlock;
}
if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
&& (euid != p->suid) && (euid != p->uid)
&& (uid != p->suid) && (uid != p->uid)) {
&& (euid != p->cred->suid) && (euid != p->cred->uid)
&& (uid != p->cred->suid) && (uid != p->cred->uid)) {
ret = -EPERM;
goto out_unlock;
}
@ -1374,7 +1374,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
rcu_read_unlock();
info.si_uid = tsk->uid;
info.si_uid = tsk->cred->uid;
thread_group_cputime(tsk, &cputime);
info.si_utime = cputime_to_jiffies(cputime.utime);
@ -1445,7 +1445,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
rcu_read_unlock();
info.si_uid = tsk->uid;
info.si_uid = tsk->cred->uid;
info.si_utime = cputime_to_clock_t(tsk->utime);
info.si_stime = cputime_to_clock_t(tsk->stime);
@ -1713,7 +1713,7 @@ static int ptrace_signal(int signr, siginfo_t *info,
info->si_errno = 0;
info->si_code = SI_USER;
info->si_pid = task_pid_vnr(current->parent);
info->si_uid = current->parent->uid;
info->si_uid = current->parent->cred->uid;
}
/* If the (new) signal is now blocked, requeue it. */