1 files changed, 20 insertions, 14 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3b792ab3c0dc..248f008d46b8 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2280,16 +2280,19 @@ static ssize_t timerslack_ns_write(struct file *file, const char __user *buf,
         if (!p)
                 return -ESRCH;
 
-        if (ptrace_may_access(p, PTRACE_MODE_ATTACH_FSCREDS)) {
-                task_lock(p);
-                if (slack_ns == 0)
-                        p->timer_slack_ns = p->default_timer_slack_ns;
-                else
-                        p->timer_slack_ns = slack_ns;
-                task_unlock(p);
-        } else
+        if (!capable(CAP_SYS_NICE)) {
                 count = -EPERM;
+                goto out;
+        }
 
+        task_lock(p);
+        if (slack_ns == 0)
+                p->timer_slack_ns = p->default_timer_slack_ns;
+        else
+                p->timer_slack_ns = slack_ns;
+        task_unlock(p);
+
+out:
         put_task_struct(p);
 
         return count;
@@ -2299,19 +2302,22 @@ static int timerslack_ns_show(struct seq_file *m, void *v)
 {
         struct inode *inode = m->private;
         struct task_struct *p;
-        int err =  0;
+        int err = 0;
 
         p = get_proc_task(inode);
         if (!p)
                 return -ESRCH;
 
-        if (ptrace_may_access(p, PTRACE_MODE_ATTACH_FSCREDS)) {
-                task_lock(p);
-                seq_printf(m, "%llu\n", p->timer_slack_ns);
-                task_unlock(p);
-        } else
+        if (!capable(CAP_SYS_NICE)) {
                 err = -EPERM;
+                goto out;
+        }
 
+        task_lock(p);
+        seq_printf(m, "%llu\n", p->timer_slack_ns);
+        task_unlock(p);
+
+out:
         put_task_struct(p);
 
         return err;