The scheduler is controlled by pid, so fix up the guts of it's system
calls to pass the appropriate pspace when looking up tasks by pid.
Signed-off-by: Eric W. Biederman <[email protected]>
---
kernel/sched.c | 2 +-
kernel/sys.c | 14 ++++++++------
2 files changed, 9 insertions(+), 7 deletions(-)
e37379b11b63503c1146cc17cec75c358154a1ec
diff --git a/kernel/sched.c b/kernel/sched.c
index 6579d49..449cc6e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3701,7 +3701,7 @@ task_t *idle_task(int cpu)
*/
static inline task_t *find_process_by_pid(pid_t pid)
{
- return pid ? find_task_by_pid(pid) : current;
+ return pid ? find_task_by_pid(current->pspace, pid) : current;
}
/* Actually do priority change: must hold rq lock. */
diff --git a/kernel/sys.c b/kernel/sys.c
index dc8cb58..bd594c3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -264,6 +264,7 @@ out:
asmlinkage long sys_setpriority(int which, int who, int niceval)
{
+ struct pspace *pspace = current->pspace;
struct task_struct *g, *p;
struct user_struct *user;
int error = -EINVAL;
@@ -283,16 +284,16 @@ asmlinkage long sys_setpriority(int whic
case PRIO_PROCESS:
if (!who)
who = current->pid;
- p = find_task_by_pid(who);
+ p = find_task_by_pid(pspace, who);
if (p)
error = set_one_prio(p, niceval, error);
break;
case PRIO_PGRP:
if (!who)
who = process_group(current);
- do_each_task_pid(who, PIDTYPE_PGID, p) {
+ do_each_task_pid(pspace, who, PIDTYPE_PGID, p) {
error = set_one_prio(p, niceval, error);
- } while_each_task_pid(who, PIDTYPE_PGID, p);
+ } while_each_task_pid(pspace, who, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->user;
@@ -324,6 +325,7 @@ out:
*/
asmlinkage long sys_getpriority(int which, int who)
{
+ struct pspace *pspace = current->pspace;
struct task_struct *g, *p;
struct user_struct *user;
long niceval, retval = -ESRCH;
@@ -336,7 +338,7 @@ asmlinkage long sys_getpriority(int whic
case PRIO_PROCESS:
if (!who)
who = current->pid;
- p = find_task_by_pid(who);
+ p = find_task_by_pid(pspace, who);
if (p) {
niceval = 20 - task_nice(p);
if (niceval > retval)
@@ -346,11 +348,11 @@ asmlinkage long sys_getpriority(int whic
case PRIO_PGRP:
if (!who)
who = process_group(current);
- do_each_task_pid(who, PIDTYPE_PGID, p) {
+ do_each_task_pid(pspace, who, PIDTYPE_PGID, p) {
niceval = 20 - task_nice(p);
if (niceval > retval)
retval = niceval;
- } while_each_task_pid(who, PIDTYPE_PGID, p);
+ } while_each_task_pid(pspace, who, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->user;
--
1.1.5.g3480
-
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