diff options
Diffstat (limited to 'sys/kern/vfs_syscalls.c')
| -rw-r--r-- | sys/kern/vfs_syscalls.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 2516155cc1a3..ef3f7b3e8184 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -3823,6 +3823,15 @@ again: } tdvp = tond.ni_dvp; tvp = tond.ni_vp; + if (tdvp == vp_crossmp) { + /* + * Rename of the root vnode of the mounted + * filesystem. It is possible to get there with the + * nullfs mount over the regular file. + */ + error = EBUSY; + goto out; + } if (tvp != NULL && (flags & AT_RENAME_NOREPLACE) != 0) { /* * Often filesystems need to relock the vnodes in |