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authorEric W. Biederman <ebiederm@xmission.com>2015-12-08 00:36:51 -0600
committerEric W. Biederman <ebiederm@xmission.com>2016-09-22 13:32:26 -0500
commit93f0a88bd4ad99a515f500a09f4a489ff03073eb (patch)
tree4c43e23b8188f560c5e5573d054e29b837095b54 /kernel/user_namespace.c
parent985e5d856cbcfc17a6646740f2200eb625c76e89 (diff)
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/user_namespace.c')
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