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-rw-r--r--sys/kern/vfs_mount.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
index 1f66a07..a494401 100644
--- a/sys/kern/vfs_mount.c
+++ b/sys/kern/vfs_mount.c
@@ -327,6 +327,13 @@ bad:
/*
* Merge the old mount options with the new ones passed
* in the MNT_UPDATE case.
+ *
+ * XXX This function will keep a "nofoo" option in the
+ * new options if there is no matching "foo" option
+ * to be cancelled in the old options. This is a bug
+ * if the option's canonical name is "foo". E.g., "noro"
+ * shouldn't end up in the mount point's active options,
+ * but it can.
*/
static void
vfs_mergeopts(struct vfsoptlist *toopts, struct vfsoptlist *opts)
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