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ksmbd: contain default data stream even if xattr is empty

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commit 1ec72153ff upstream.

If xattr is not supported like exfat or fat, ksmbd server doesn't
contain default data stream in FILE_STREAM_INFORMATION response. It will
cause ppt or doc file update issue if local filesystem is such as ones.
This patch move goto statement to contain it.

Fixes: 9f6323311c ("ksmbd: add default data stream name in FILE_STREAM_INFORMATION")
Cc: stable@vger.kernel.org # v5.15
Acked-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namjae Jeon
2021-11-21 11:32:39 +09:00
committed by Greg Kroah-Hartman
parent b05576526e
commit 522cd5c655
1 changed files with 9 additions and 9 deletions
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18
fs/ksmbd/smb2pdu.c
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@@ -4450,6 +4450,12 @@ static void get_file_stream_info(struct ksmbd_work *work,
&stat);
file_info = (struct smb2_file_stream_info *)rsp->Buffer;
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
goto out;
xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (xattr_list_len < 0) {
goto out;
@@ -4458,12 +4464,6 @@ static void get_file_stream_info(struct ksmbd_work *work,
goto out;
}
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
goto out;
while (idx < xattr_list_len) {
stream_name = xattr_list + idx;
streamlen = strlen(stream_name);
@@ -4507,6 +4507,7 @@ static void get_file_stream_info(struct ksmbd_work *work,
file_info->NextEntryOffset = cpu_to_le32(next);
}
out:
if (!S_ISDIR(stat.mode) &&
buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
file_info = (struct smb2_file_stream_info *)
@@ -4515,14 +4516,13 @@ static void get_file_stream_info(struct ksmbd_work *work,
"::$DATA", 7, conn->local_nls, 0);
streamlen *= 2;
file_info->StreamNameLength = cpu_to_le32(streamlen);
file_info->StreamSize = 0;
file_info->StreamAllocationSize = 0;
file_info->StreamSize = cpu_to_le64(stat.size);
file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
}
/* last entry offset should be 0 */
file_info->NextEntryOffset = 0;
out:
kvfree(xattr_list);
rsp->OutputBufferLength = cpu_to_le32(nbytes);