diff options
| -rw-r--r-- | sys/kern/vfs_mount.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c index b3870e46c5e9..59000728efcc 100644 --- a/sys/kern/vfs_mount.c +++ b/sys/kern/vfs_mount.c @@ -918,10 +918,10 @@ vfs_domount_first( /* * If the jail of the calling thread lacks permission for this type of - * file system, deny immediately. + * file system, or is trying to cover its own root, deny immediately. */ - if (jailed(td->td_ucred) && !prison_allow(td->td_ucred, - vfsp->vfc_prison_flag)) { + if (jailed(td->td_ucred) && (!prison_allow(td->td_ucred, + vfsp->vfc_prison_flag) || vp == td->td_ucred->cr_prison->pr_root)) { vput(vp); return (EPERM); } |