ksmbd: fix partial file information responses

Variable-length file information handlers use the client output length
while constructing the response. FILE_ALL_INFORMATION can consequently
return -EINVAL before the common buffer check, while stream information
can stop building the complete result too early.

Build the complete response within the available server response buffer
and apply the client output length only when selecting the final status
and transmitted length. Use the protocol-defined fixed sizes for all,
alternate-name, and stream information to distinguish
STATUS_INFO_LENGTH_MISMATCH from STATUS_BUFFER_OVERFLOW.

This fixes smb2.getinfo.qfile_buffercheck.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions