Merge branch 'master' into next

1 files changed, 7 insertions, 3 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index e0afd326b68..fb45615943c 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -80,6 +80,7 @@
 #include <linux/oom.h>
 #include <linux/elf.h>
 #include <linux/pid_namespace.h>
+#include <linux/fs_struct.h>
 #include "internal.h"
 
 /* NOTE:
@@ -321,7 +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);
 }
@@ -647,14 +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);