From: Eric W. Biederman <ebiederm@xmission.com>
Date: Sat, 11 Aug 2012 19:38:26 +0000 (-0700)
Subject: procfs: Print task uids and gids in the userns that opened the proc file
X-Git-Tag: firefly_0821_release~3680^2~1404^2~9
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e9f238c3041e2582a710e75910c8cbf2a98e51b2;p=firefly-linux-kernel-4.4.55.git

procfs: Print task uids and gids in the userns that opened the proc file

Instead of using current_userns() use the userns of the opener
of the file so that if the file is passed between processes
the contents of the file do not change.

Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---

diff --git a/fs/proc/array.c b/fs/proc/array.c
index c1c207c36cae..554434265613 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -162,7 +162,7 @@ static inline const char *get_task_state(struct task_struct *tsk)
 static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
 				struct pid *pid, struct task_struct *p)
 {
-	struct user_namespace *user_ns = current_user_ns();
+	struct user_namespace *user_ns = seq_user_ns(m);
 	struct group_info *group_info;
 	int g;
 	struct fdtable *fdt = NULL;