ksmbd: return buffer overflow for partial filesystem info

The query-info buffer check returns STATUS_INFO_LENGTH_MISMATCH for
every output buffer smaller than the complete response. Variable-length
filesystem information instead requires STATUS_BUFFER_OVERFLOW when the
fixed portion fits but the complete data does not.

Pass the fixed size for each filesystem information class to the buffer
checker. Keep INFO_LENGTH_MISMATCH for buffers below that size, and
return BUFFER_OVERFLOW with a response truncated to the requested length
for larger partial buffers.

This fixes smb2.getinfo.qfs_buffercheck.

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

0 files changed, 0 insertions, 0 deletions