From: Andrei Vagin <avagin@openvz.org>
To: David Howells <dhowells@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, Andrei Vagin <avagin@openvz.org>,
Andrei Vagin <avagin@gmail.com>
Subject: [PATCH dhowells/mount-api] proc: set a proper user namespace for fs_context
Date: Thu, 16 Aug 2018 00:34:07 -0700 [thread overview]
Message-ID: <20180816073407.12567-1-avagin@openvz.org> (raw)
A user namespace should be taken from a pidns for which a procfs is created.
Signed-off-by: Andrei Vagin <avagin@gmail.com>
---
fs/proc/root.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 1d6e5bfa30cc..1419b48a89ab 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -315,6 +315,11 @@ int pid_ns_prepare_proc(struct pid_namespace *ns)
if (IS_ERR(fc))
return PTR_ERR(fc);
+ if (fc->user_ns != ns->user_ns) {
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ns->user_ns);
+ }
+
ctx = fc->fs_private;
if (ctx->pid_ns != ns) {
put_pid_ns(ctx->pid_ns);
--
2.17.1
next reply other threads:[~2018-08-16 10:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 7:34 Andrei Vagin [this message]
2018-08-16 22:16 ` [PATCH dhowells/mount-api] proc: set a proper user namespace for fs_context Andrei Vagin
2018-08-21 7:33 ` David Howells
2018-08-21 7:39 ` David Howells
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180816073407.12567-1-avagin@openvz.org \
--to=avagin@openvz.org \
--cc=avagin@gmail.com \
--cc=dhowells@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).