>+++ b/fs/unionfs/dirhelper.c
>+/* This filldir function makes sure only whiteouts exist within a directory. */
>+static int readdir_util_callback(void *dirent, const char *name, int namelen,
>+ loff_t offset, u64 ino, unsigned int d_type)
>+{
>+ int err = 0;
>+ struct unionfs_rdutil_callback *buf = dirent;
>+ int whiteout = 0;
>+ struct filldir_node *found;
>+
>+ buf->filldir_called = 1;
>+
>+ if (name[0] == '.'
>+ && (namelen == 1 || (name[1] == '.' && namelen == 2)))
>+ goto out;
>+
>+ if (namelen > UNIONFS_WHLEN && !strncmp(name, UNIONFS_WHPFX, UNIONFS_WHLEN)) {
When I see this if, I feel like asking (unrelated to dirhelper.c):
what do we do when
* strlen(UNIONFS_WHPFX filename) is greater than the maximum file
name length supported by a filesystem?
* strlen(absolute_path(UNIONFS_WHPFX filename)) is greater than PATH_MAX?
-`J'
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