1 files changed, 6 insertions, 3 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index f71559784bfb..fb45615943c2 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -322,7 +322,10 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
         wchan = get_wchan(task);
 
         if (lookup_symbol_name(wchan, symname) < 0)
-                return sprintf(buffer, "%lu", wchan);
+                if (!ptrace_may_access(task, PTRACE_MODE_READ))
+                        return 0;
+                else
+                        return sprintf(buffer, "%lu", wchan);
         else
                 return sprintf(buffer, "%s", symname);
 }
@@ -648,14 +651,14 @@ static unsigned mounts_poll(struct file *file, poll_table *wait)
 {
         struct proc_mounts *p = file->private_data;
         struct mnt_namespace *ns = p->ns;
-        unsigned res = 0;
+        unsigned res = POLLIN | POLLRDNORM;
 
         poll_wait(file, &ns->poll, wait);
 
         spin_lock(&vfsmount_lock);
         if (p->event != ns->event) {
                 p->event = ns->event;
-                res = POLLERR;
+                res |= POLLERR | POLLPRI;
         }
         spin_unlock(&vfsmount_lock);