diff options
author | 2021-05-11 16:30:15 +0200 | |
---|---|---|
committer | 2021-05-12 14:13:16 +0200 | |
commit | 2ca4dcc4909d787ee153272f7efc2bff3b498720 (patch) | |
tree | 730c43aa2706393f338200da6eb1ba333487d244 /arch | |
parent | Linux 5.13-rc1 (diff) | |
download | linux-2ca4dcc4909d787ee153272f7efc2bff3b498720.tar.gz linux-2ca4dcc4909d787ee153272f7efc2bff3b498720.tar.bz2 linux-2ca4dcc4909d787ee153272f7efc2bff3b498720.zip |
fs/mount_setattr: tighten permission checks
We currently don't have any filesystems that support idmapped mounts
which are mountable inside a user namespace. That was a deliberate
decision for now as a userns root can just mount the filesystem
themselves. So enforce this restriction explicitly until there's a real
use-case for this. This way we can notice it and will have a chance to
adapt and audit our translation helpers and fstests appropriately if we
need to support such filesystems.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
CC: linux-fsdevel@vger.kernel.org
Suggested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions