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    Subject[PATCH AUTOSEL 4.14 04/25] Fixed https://bugzilla.kernel.org/show_bug.cgi?id=202935 allow write on the same file
    Date
    From: Kovtunenko Oleksandr <alexander198961@gmail.com>

    [ Upstream commit 9ab70ca653307771589e1414102c552d8dbdbbef ]

    Copychunk allows source and target to be on the same file.
    For details on restrictions see MS-SMB2 3.3.5.15.6

    Signed-off-by: Kovtunenko Oleksandr <alexander198961@gmail.com>
    Signed-off-by: Steve French <stfrench@microsoft.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    fs/cifs/cifsfs.c | 5 -----
    1 file changed, 5 deletions(-)

    diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
    index c5fd5abf72069..262048e6073f3 100644
    --- a/fs/cifs/cifsfs.c
    +++ b/fs/cifs/cifsfs.c
    @@ -998,11 +998,6 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,

    cifs_dbg(FYI, "copychunk range\n");

    - if (src_inode == target_inode) {
    - rc = -EINVAL;
    - goto out;
    - }
    -
    if (!src_file->private_data || !dst_file->private_data) {
    rc = -EBADF;
    cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
    --
    2.20.1
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