[merged mm-stable] userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch removed from -mm tree

[merged mm-stable] userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: userfaultfd: fix return error if mmap_changing is non-zero in MOVE ioctl
has been removed from the -mm tree.  Its filename was
     userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Lokesh Gidra <lokeshgidra@google.com>
Subject: userfaultfd: fix return error if mmap_changing is non-zero in MOVE ioctl
Date: Wed, 17 Jan 2024 14:39:21 -0800

To be consistent with other uffd ioctl's returning EAGAIN when
mmap_changing is detected, we should change UFFDIO_MOVE to do the same.

Link: https://lkml.kernel.org/r/20240117223922.1445327-1-lokeshgidra@google.com
Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Nicolas Geoffray <ngeoffray@google.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/userfaultfd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/userfaultfd.c~userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl
+++ a/fs/userfaultfd.c
@@ -2047,7 +2047,7 @@ static int userfaultfd_move(struct userf
 			ret = move_pages(ctx, mm, uffdio_move.dst, uffdio_move.src,
 					 uffdio_move.len, uffdio_move.mode);
 		else
-			ret = -EINVAL;
+			ret = -EAGAIN;
 
 		mmap_read_unlock(mm);
 		mmput(mm);
_

Patches currently in -mm which might be from lokeshgidra@google.com are

userfaultfd-move-userfaultfd_ctx-struct-to-header-file.patch
userfaultfd-protect-mmap_changing-with-rw_sem-in-userfaulfd_ctx.patch
mm-add-vma_assert_locked-for-config_per_vma_lock.patch
userfaultfd-use-per-vma-locks-in-userfaultfd-operations.patch