From: Christian Brauner <christian.brauner@ubuntu.com> To: Alexander Viro <viro@zeniv.linux.org.uk>, Christoph Hellwig <hch@infradead.org>, linux-fsdevel@vger.kernel.org Cc: Andy Lutomirski <luto@kernel.org>, Mimi Zohar <zohar@linux.ibm.com>, James Bottomley <James.Bottomley@hansenpartnership.com>, Andreas Dilger <adilger.kernel@dilger.ca>, containers@lists.linux-foundation.org, Christoph Hellwig <hch@lst.de>, Tycho Andersen <tycho@tycho.ws>, Paul Moore <paul@paul-moore.com>, Jonathan Corbet <corbet@lwn.net>, smbarber@chromium.org, linux-ext4@vger.kernel.org, Mrunal Patel <mpatel@redhat.com>, Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>, selinux@vger.kernel.org, Josh Triplett <josh@joshtriplett.org>, Seth Forshee <seth.forshee@canonical.com>, Aleksa Sarai <cyphar@cyphar.com>, Lennart Poettering <lennart@poettering.net>, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>, Geoffrey Thomas <geofft@ldpreload.com>, David Howells <dhowells@redhat.com>, John Johansen <john.johansen@canonical.com>, Theodore Tso <tytso@mit.edu>, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>, Stephen Smalley <stephen.smalley.work@gmail.com>, linux-security-module@vger.kernel.org, "Eric W. Biederman" <ebiederm@xmission.com>, linux-api@vger.kernel.org, Casey Schaufler <casey@schaufler-ca.com>, Alban Crequy <alban@kinvolk.io>, linux-integrity@vger.kernel.org, Todd Kjos <tkjos@google.com> Subject: [PATCH v4 23/40] af_unix: handle idmapped mounts Date: Fri, 4 Dec 2020 00:57:19 +0100 [thread overview] Message-ID: <20201203235736.3528991-24-christian.brauner@ubuntu.com> (raw) In-Reply-To: <20201203235736.3528991-1-christian.brauner@ubuntu.com> When binding a non-abstract AF_UNIX socket it will gain a representation in the filesystem. Enable the socket infrastructure to handle idmapped mounts by passing down the user namespace of the mount the socket will be created from. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> --- /* v2 */ unchanged /* v3 */ unchanged /* v4 */ unchanged --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index b4987805e5e5..4be33240e9cc 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -996,7 +996,7 @@ static int unix_mknod(const char *sun_path, umode_t mode, struct path *res) */ err = security_path_mknod(&path, dentry, mode, 0); if (!err) { - err = vfs_mknod(&init_user_ns, d_inode(path.dentry), dentry, mode, 0); + err = vfs_mknod(mnt_user_ns(path.mnt), d_inode(path.dentry), dentry, mode, 0); if (!err) { res->mnt = mntget(path.mnt); res->dentry = dget(dentry); -- 2.29.2 _______________________________________________ Containers mailing list Containers@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/containers
WARNING: multiple messages have this Message-ID (diff)
From: Christian Brauner <christian.brauner@ubuntu.com> To: Alexander Viro <viro@zeniv.linux.org.uk>, Christoph Hellwig <hch@infradead.org>, linux-fsdevel@vger.kernel.org Cc: "John Johansen" <john.johansen@canonical.com>, "James Morris" <jmorris@namei.org>, "Mimi Zohar" <zohar@linux.ibm.com>, "Dmitry Kasatkin" <dmitry.kasatkin@gmail.com>, "Stephen Smalley" <stephen.smalley.work@gmail.com>, "Casey Schaufler" <casey@schaufler-ca.com>, "Arnd Bergmann" <arnd@arndb.de>, "Andreas Dilger" <adilger.kernel@dilger.ca>, "OGAWA Hirofumi" <hirofumi@mail.parknet.co.jp>, "Geoffrey Thomas" <geofft@ldpreload.com>, "Mrunal Patel" <mpatel@redhat.com>, "Josh Triplett" <josh@joshtriplett.org>, "Andy Lutomirski" <luto@kernel.org>, "Theodore Tso" <tytso@mit.edu>, "Alban Crequy" <alban@kinvolk.io>, "Tycho Andersen" <tycho@tycho.ws>, "David Howells" <dhowells@redhat.com>, "James Bottomley" <James.Bottomley@hansenpartnership.com>, "Seth Forshee" <seth.forshee@canonical.com>, "Stéphane Graber" <stgraber@ubuntu.com>, "Aleksa Sarai" <cyphar@cyphar.com>, "Lennart Poettering" <lennart@poettering.net>, "Eric W. Biederman" <ebiederm@xmission.com>, smbarber@chromium.org, "Phil Estes" <estesp@gmail.com>, "Serge Hallyn" <serge@hallyn.com>, "Kees Cook" <keescook@chromium.org>, "Todd Kjos" <tkjos@google.com>, "Paul Moore" <paul@paul-moore.com>, "Jonathan Corbet" <corbet@lwn.net>, containers@lists.linux-foundation.org, linux-security-module@vger.kernel.org, linux-api@vger.kernel.org, linux-ext4@vger.kernel.org, linux-integrity@vger.kernel.org, selinux@vger.kernel.org, "Christian Brauner" <christian.brauner@ubuntu.com>, "Christoph Hellwig" <hch@lst.de> Subject: [PATCH v4 23/40] af_unix: handle idmapped mounts Date: Fri, 4 Dec 2020 00:57:19 +0100 [thread overview] Message-ID: <20201203235736.3528991-24-christian.brauner@ubuntu.com> (raw) In-Reply-To: <20201203235736.3528991-1-christian.brauner@ubuntu.com> When binding a non-abstract AF_UNIX socket it will gain a representation in the filesystem. Enable the socket infrastructure to handle idmapped mounts by passing down the user namespace of the mount the socket will be created from. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> --- /* v2 */ unchanged /* v3 */ unchanged /* v4 */ unchanged --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index b4987805e5e5..4be33240e9cc 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -996,7 +996,7 @@ static int unix_mknod(const char *sun_path, umode_t mode, struct path *res) */ err = security_path_mknod(&path, dentry, mode, 0); if (!err) { - err = vfs_mknod(&init_user_ns, d_inode(path.dentry), dentry, mode, 0); + err = vfs_mknod(mnt_user_ns(path.mnt), d_inode(path.dentry), dentry, mode, 0); if (!err) { res->mnt = mntget(path.mnt); res->dentry = dget(dentry); -- 2.29.2
next prev parent reply other threads:[~2020-12-04 0:07 UTC|newest] Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-12-03 23:56 [PATCH v4 00/40] idmapped mounts Christian Brauner 2020-12-03 23:56 ` Christian Brauner 2020-12-03 23:56 ` [PATCH v4 01/40] namespace: take lock_mount_hash() directly when changing flags Christian Brauner 2020-12-03 23:56 ` Christian Brauner 2020-12-03 23:56 ` [PATCH v4 02/40] mount: make {lock,unlock}_mount_hash() static Christian Brauner 2020-12-03 23:56 ` Christian Brauner 2020-12-03 23:56 ` [PATCH v4 03/40] namespace: only take read lock in do_reconfigure_mnt() Christian Brauner 2020-12-03 23:56 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 04/40] fs: split out functions to hold writers Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-07 17:08 ` Christoph Hellwig 2020-12-07 17:08 ` Christoph Hellwig 2020-12-03 23:57 ` [PATCH v4 05/40] fs: add attr_flags_to_mnt_flags helper Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-07 17:10 ` Christoph Hellwig 2020-12-07 17:10 ` Christoph Hellwig 2020-12-08 10:07 ` Christian Brauner 2020-12-08 10:07 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 06/40] fs: add mount_setattr() Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-07 17:14 ` Christoph Hellwig 2020-12-07 17:14 ` Christoph Hellwig 2020-12-08 10:37 ` Christian Brauner 2020-12-08 10:37 ` Christian Brauner 2020-12-08 15:05 ` Christoph Hellwig 2020-12-08 15:05 ` Christoph Hellwig 2020-12-08 15:22 ` Christian Brauner 2020-12-08 15:22 ` Christian Brauner 2020-12-08 15:26 ` Christian Brauner 2020-12-08 15:26 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 07/40] tests: add mount_setattr() selftests Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 08/40] fs: add id translation helpers Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 09/40] mount: attach mappings to mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 10/40] capability: handle idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 11/40] namei: make permission helpers idmapped mount aware Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 12/40] inode: make init and " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 13/40] attr: handle idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 14/40] acl: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 15/40] xattr: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 16/40] commoncap: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 17/40] stat: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 18/40] namei: handle idmapped mounts in may_*() helpers Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 19/40] namei: introduce struct renamedata Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 20/40] namei: prepare for idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 21/40] open: handle idmapped mounts in do_truncate() Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 22/40] open: handle idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` Christian Brauner [this message] 2020-12-03 23:57 ` [PATCH v4 23/40] af_unix: " Christian Brauner 2020-12-03 23:57 ` [PATCH v4 24/40] utimes: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 25/40] fcntl: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 26/40] notify: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 27/40] init: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 28/40] ioctl: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 29/40] would_dump: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 30/40] exec: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 31/40] fs: make helpers idmap mount aware Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 32/40] apparmor: handle idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 33/40] ima: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 34/40] fat: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 35/40] ext4: support " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 36/40] ecryptfs: do not mount on top of " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 37/40] overlayfs: " Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 38/40] fs: introduce MOUNT_ATTR_IDMAP Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 39/40] tests: extend mount_setattr tests Christian Brauner 2020-12-03 23:57 ` Christian Brauner 2020-12-03 23:57 ` [PATCH v4 40/40] generic/618: add fstests for idmapped mounts Christian Brauner 2020-12-03 23:57 ` Christian Brauner
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