The patch titled
Subject: userfaultfd: fix return error if mmap_changing is non-zero in MOVE ioctl
has been added to the -mm mm-unstable branch. Its filename is
userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Acked-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Brian Geffon <bgeffon@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Nicolas Geoffray <ngeoffray@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch
