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| author |   Eric W. Biederman <ebiederm@xmission.com> | 2015-12-08 00:36:51 -0600 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2016-09-22 13:32:26 -0500 |
| commit | 93f0a88bd4ad99a515f500a09f4a489ff03073eb (patch) | |
| tree | 4c43e23b8188f560c5e5573d054e29b837095b54 /kernel/utsname.c | |
| parent | devpts: Remove sync_filesystems (diff) | |
| download | wireguard-linux-93f0a88bd4ad99a515f500a09f4a489ff03073eb.tar.xz wireguard-linux-93f0a88bd4ad99a515f500a09f4a489ff03073eb.zip | |
devpts: Change the owner of /dev/pts/ptmx to the mounter of /dev/pts
In 99.99% of the cases only root in a user namespace can mount /dev/pts
and in those cases the owner of /dev/pts/ptmx will remain root.root
In the oddball case where someone else has CAP_SYS_ADMIN this code
modifies the /dev/pts mount code to use current_fsuid and current_fsgid
as the values to use when creating the /dev/ptmx inode. As is done
when any other file is created.
This is a code simplification, and it allows running without a root
user entirely.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/utsname.c')
0 files changed, 0 insertions, 0 deletions