From 1b4db09b7f10895dc1a0bc32704c7de05188fb1d Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 23 Jun 2026 20:48:23 +0800 Subject: [PATCH] f2fs: fix to avoid move_range and defragment on device_alias file It's forbidden to migrate blocks of device alias file. Cc: stable@kernel.org Fixes: 128d333f0dff ("f2fs: introduce device aliasing file") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index f0b74984b658..b99d9cdf9ba7 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3092,6 +3092,9 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) if (f2fs_readonly(sbi->sb)) return -EROFS; + if (IS_DEVICE_ALIASING(inode)) + return -EOPNOTSUPP; + if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, sizeof(range))) return -EFAULT; @@ -3145,7 +3148,8 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode)) return -EINVAL; - if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst)) + if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst) || + IS_DEVICE_ALIASING(src) || IS_DEVICE_ALIASING(dst)) return -EOPNOTSUPP; if (pos_out < 0 || pos_in < 0)