diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2026-06-04 19:56:36 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2026-06-06 03:28:28 +0000 |
| commit | d53633bfcf24a3eb3711e24b597aa8301f92b958 (patch) | |
| tree | 5a9627bce146c006d3e7e6676e20204ede4a48a2 /sys/kern | |
| parent | 5d0ebfe1d97801518755c7025f57ba7d5bf1c8db (diff) | |
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/vfs_lookup.c | 2 | ||||
| -rw-r--r-- | sys/kern/vfs_syscalls.c | 9 |
2 files changed, 10 insertions, 1 deletions
diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c index c1363c0104d3..5d66070ca142 100644 --- a/sys/kern/vfs_lookup.c +++ b/sys/kern/vfs_lookup.c @@ -113,7 +113,7 @@ SDT_PROBE_DEFINE4(vfs, namei, lookup, return, "int", "struct vnode *", "bool", uma_zone_t namei_zone; /* Placeholder vnode for mp traversal. */ -static struct vnode *vp_crossmp; +struct vnode *vp_crossmp; static int crossmp_vop_islocked(struct vop_islocked_args *ap) diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 71d37e08c65b..7ca7ccd582e1 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 |