HI Yanghh,

It looks like your patch has broken dsread.

commit a3fd7cbd98d911aa754442afe06499ea4f1c9e21
Author: Haihua Yang <yanghh@gmail.com>
Date:   Tue Aug 26 16:59:17 2025 +0000

    Add RDMA support in dsread

    Change-Id: I435368449e048fc82cc27079a3e295dd4618f425
    Signed-off-by: Haihua Yang <yanghh@gmail.com>

The code in get_buffer_for_io_response() is under #ifdef _USE_NFS_RDMA and returns NULL if it is not set.

The call from op_dsread() is not under _USE_NFS_RDMA.

There is no error checking for returning NULL.

Marc.