[PATCH review 13/16] userns: Allow unprivilged mounts of proc and sysfs

Eric W. Biederman
2012-11-19T15:17:57Z

- The context in which proc and sysfs are mounted have no
effect on the the uid/gid of their files so no conversion is
needed except allowing the mount.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
fs/proc/root.c | 1 +
fs/sysfs/mount.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/proc/root.c b/fs/proc/root.c
index f2f2511..c6e9fac 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -145,6 +145,7 @@ static struct file_system_type proc_fs_type = {
.name = "proc",
.mount = proc_mount,
.kill_sb = proc_kill_sb,
+ .fs_flags = FS_USERNS_MOUNT,
};

void __init proc_root_init(void)
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 71eb7e2..db940a9 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -149,6 +149,7 @@ static struct file_system_type sysfs_fs_type = {
.name = "sysfs",
.mount = sysfs_mount,
.kill_sb = sysfs_kill_sb,
+ .fs_flags = FS_USERNS_MOUNT,
};

int __init sysfs_init(void)
--
1.7.5.4