+ ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents.patch added to mm-nonmm-unstable branch

+ ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: ocfs2: add extra flags check in ocfs2_ioctl_move_extents()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents.patch

This patch will later appear in the mm-nonmm-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: Dmitry Antipov <dmantipov@yandex.ru>
Subject: ocfs2: add extra flags check in ocfs2_ioctl_move_extents()
Date: Thu, 9 Oct 2025 13:23:48 +0300

In 'ocfs2_ioctl_move_extents()', add extra check whether only actually
supported flags are passed via 'ioctl(..., OCFS2_IOC_MOVE_EXT, ...)',
and reject anything beyond OCFS2_MOVE_EXT_FL_AUTO_DEFRAG and
OCFS2_MOVE_EXT_FL_PART_DEFRAG with -EINVAL. In particular,
OCFS2_MOVE_EXT_FL_COMPLETE may be set by the kernel only and
should never be passed from userspace.

Link: https://lkml.kernel.org/r/20251009102349.181126-1-dmantipov@yandex.ru
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ocfs2/move_extents.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/fs/ocfs2/move_extents.c~ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents
+++ a/fs/ocfs2/move_extents.c
@@ -1031,6 +1031,12 @@ int ocfs2_ioctl_move_extents(struct file
 	if (range.me_threshold > i_size_read(inode))
 		range.me_threshold = i_size_read(inode);
 
+	if (range.me_flags & ~(OCFS2_MOVE_EXT_FL_AUTO_DEFRAG |
+			       OCFS2_MOVE_EXT_FL_PART_DEFRAG)) {
+		status = -EINVAL;
+		goto out_free;
+	}
+
 	if (range.me_flags & OCFS2_MOVE_EXT_FL_AUTO_DEFRAG) {
 		context->auto_defrag = 1;
 
_

Patches currently in -mm which might be from dmantipov@yandex.ru are

ocfs2-add-extra-flags-check-in-ocfs2_ioctl_move_extents.patch
ocfs2-relax-bug-to-ocfs2_error-in-__ocfs2_move_extent.patch