Re: [PATCH 1/2] ntfs: fix NULL dereference in ntfs_index_walk_down()

[DaeMyung Kang]

On Sat, Apr 25, 2026, Namjae Jeon wrote:
> Is there any reason why you use IS_ERR_OR_NULL(), not IS_ERR() ?

No good reason -- that was over-defensive on my part. Inside the loop,
entry is only set to one of:

  - ie, the caller's argument (both call sites pass a pointer
    arithmetic result that cannot be NULL),
  - ntfs_ie_get_first(&ictx->ib->index), which is also pointer
    arithmetic on ictx->ib that we just checked non-NULL above,
  - ERR_PTR(-EIO) on ntfs_ib_read() failure.

So entry is never NULL inside the loop body. I'll switch to plain
IS_ERR() in v2.

Thanks,
DaeMyung