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UBUNTU: SAUCE: shiftfs: lock down certain superblock flags
authorChristian Brauner <christian@brauner.io>
Wed, 8 May 2019 12:13:14 +0000 (14:13 +0200)
committerAndrea Righi <andrea.righi@canonical.com>
Mon, 15 Feb 2021 07:25:44 +0000 (08:25 +0100)
commite36a1be6aace325c9a9b6fdede7956c3ebb3f619
tree42906c3fc76c759f295f6953902dd7363557877ctree
parentf3365a7263a0bcc5e06f01d8d336c145baacf9efcommit | diff
UBUNTU: SAUCE: shiftfs: lock down certain superblock flags

BugLink: https://bugs.launchpad.net/bugs/1827122
This locks down various superblock flags to prevent userns-root from
remounting a superblock with less restrictive options than the original
mark or underlay mount.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
fs/shiftfs.c diff | blob | blame | history
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