hostfs' __dentry_name() relies on the fact that dentry_path_raw() will place
the path name at the end of the provided buffer.
While this is okay, add a BUG_ON() to detect behavior changes as soon
as possible.
Signed-off-by: Richard Weinberger <rich...@nod.at>
---
fs/hostfs/hostfs_kern.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 67e556c..3082a7e 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -93,6 +93,13 @@ static char *__dentry_name(struct dentry *dentry, char *name)
__putname(name);
return NULL;
}
+
+ /*
+ * This function relies on the fact that dentry_path_raw() will place
+ * the path name at the end of the provided buffer.
+ */
+ BUG_ON(p + strlen(p) + 1 != name + PATH_MAX);
+
strlcpy(name, root, PATH_MAX);
if (len > p - name) {
__putname(name);
--
2.3.2
------------------------------------------------------------------------------
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