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um: Remove SKAS3/4 support

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Before we had SKAS0 UML had two modes of operation
TT (tracing thread) and SKAS3/4 (separated kernel address space).
TT was known to be insecure and got removed a long time ago.
SKAS3/4 required a few (3 or 4) patches on the host side which never went
mainline. The last host patch is 10 years old.

With SKAS0 mode (separated kernel address space using 0 host patches),
default since 2005, SKAS3/4 is obsolete and can be removed.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger
2015-03-18 21:31:27 +01:00
parent aaeac66b1a
commit d0b5e15f0c
18 changed files with 145 additions and 811 deletions
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31
arch/um/kernel/reboot.c
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@@ -15,28 +15,21 @@ void (*pm_power_off)(void);
static void kill_off_processes(void)
{
if (proc_mm)
/*
* FIXME: need to loop over userspace_pids
*/
os_kill_ptraced_process(userspace_pid[0], 1);
else {
struct task_struct *p;
int pid;
struct task_struct *p;
int pid;
read_lock(&tasklist_lock);
for_each_process(p) {
struct task_struct *t;
read_lock(&tasklist_lock);
for_each_process(p) {
struct task_struct *t;
t = find_lock_task_mm(p);
if (!t)
continue;
pid = t->mm->context.id.u.pid;
task_unlock(t);
os_kill_ptraced_process(pid, 1);
}
read_unlock(&tasklist_lock);
t = find_lock_task_mm(p);
if (!t)
continue;
pid = t->mm->context.id.u.pid;
task_unlock(t);
os_kill_ptraced_process(pid, 1);
}
read_unlock(&tasklist_lock);
}
void uml_cleanup(void)