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vfs: Allow userns root to call mknod on owned filesystems.
authorEric W. Biederman <ebiederm@xmission.com>
Wed, 23 May 2018 20:24:18 +0000 (15:24 -0500)
committerEric W. Biederman <ebiederm@xmission.com>
Thu, 24 May 2018 16:56:43 +0000 (11:56 -0500)
commit55956b59df336f6738da916dbb520b6e37df9fbd
tree092af72e9a7cb4ac14ddd1941cf82b6c269e0a1b
parent593d1ce854dff93b3c9066e897192eb676b09c46
vfs: Allow userns root to call mknod on owned filesystems.

These filesystems already always set SB_I_NODEV so mknod will not be
useful for gaining control of any devices no matter their permissions.
This will allow overlayfs and applications like to fakeroot to use
device nodes to represent things on disk.

Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
fs/namei.c