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Subject[PATCH 02/11] rlimits: add task_struct to update_rlimit_cpu
Date
From: Jiri Slaby <jirislaby@gmail.com>

Add task_struct as a parameter to update_rlimit_cpu to be able to set
rlimit_cpu of different task than current.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
---
include/linux/posix-timers.h | 2 +-
kernel/posix-cpu-timers.c | 8 ++++----
kernel/sys.c | 2 +-
security/selinux/hooks.c | 3 ++-
4 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 4f71bf4..3e23844 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -117,6 +117,6 @@ void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,

long clock_nanosleep_restart(struct restart_block *restart_block);

-void update_rlimit_cpu(unsigned long rlim_new);
+void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new);

#endif
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 9829646..0513900 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -16,13 +16,13 @@
* siglock protection since other code may update expiration cache as
* well.
*/
-void update_rlimit_cpu(unsigned long rlim_new)
+void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new)
{
cputime_t cputime = secs_to_cputime(rlim_new);

- spin_lock_irq(&current->sighand->siglock);
- set_process_cpu_timer(current, CPUCLOCK_PROF, &cputime, NULL);
- spin_unlock_irq(&current->sighand->siglock);
+ spin_lock_irq(&task->sighand->siglock);
+ set_process_cpu_timer(task, CPUCLOCK_PROF, &cputime, NULL);
+ spin_unlock_irq(&task->sighand->siglock);
}

static int check_clock(const clockid_t which_clock)
diff --git a/kernel/sys.c b/kernel/sys.c
index 1ba4522..f5183b0 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1320,7 +1320,7 @@ SYSCALL_DEFINE2(setrlimit, unsigned int, resource, struct rlimit __user *, rlim)
if (new_rlim.rlim_cur == RLIM_INFINITY)
goto out;

- update_rlimit_cpu(new_rlim.rlim_cur);
+ update_rlimit_cpu(current, new_rlim.rlim_cur);
out:
return 0;
}
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 674992f..740a71f 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2360,7 +2360,8 @@ static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
initrlim = init_task.signal->rlim + i;
rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
}
- update_rlimit_cpu(current->signal->rlim[RLIMIT_CPU].rlim_cur);
+ update_rlimit_cpu(current,
+ current->signal->rlim[RLIMIT_CPU].rlim_cur);
}
}

--
1.7.1



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