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Index: sys/kern/vfs_lookup.c
===================================================================
--- sys/kern/vfs_lookup.c
+++ sys/kern/vfs_lookup.c
@@ -1235,23 +1235,22 @@
MPASS(cnp->cn_nameptr[0] != '\0');
/*
- * Handle "..": five special cases.
- * 0. If doing a capability lookup and lookup_cap_dotdot is
- * disabled, return ENOTCAPABLE.
- * 1. Return an error if this is the last component of
- * the name and the operation is DELETE or RENAME.
- * 2. If at root directory (e.g. after chroot)
- * or at absolute root directory
- * then ignore it so can't get out.
- * 3. If this vnode is the root of a mounted
- * filesystem, then replace it with the
- * vnode which was mounted on so we take the
- * .. in the other filesystem.
- * 4. If the vnode is the top directory of
- * the jail or chroot, don't let them out.
- * 5. If doing a capability lookup and lookup_cap_dotdot is
- * enabled, return ENOTCAPABLE if the lookup would escape
- * from the initial file descriptor directory.
+ * Handle "..": six special cases.
+ * 1. If doing a capability lookup and lookup_cap_dotdot is disabled,
+ * or NI_LCF_STRICTRELATIVE and not NI_LCF_CAP_DOTDOT is set, return
+ * ENOTCAPABLE.
+ * 2. Return an error if this is the last component of the name and the
+ * operation is DELETE or RENAME.
+ * 3. If at root directory (e.g. after chroot) or at absolute root
+ * directory then ignore it so can't get out.
+ * 4. If this vnode is the root of a mounted filesystem, then replace
+ * it with the vnode which was mounted on so we take the .. in the
+ * other filesystem.
+ * 5. If the vnode is the top directory of the jail or chroot, don't
+ * let them out.
+ * 6. If doing a capability lookup and lookup_cap_dotdot is enabled,
+ * return ENOTCAPABLE if the lookup would escape from the initial
+ * file descriptor directory.
*/
if (cnp->cn_flags & ISDOTDOT) {
if (__predict_false((ndp->ni_lcf & (NI_LCF_STRICTREL_KTR |

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