rpc: switch to MT-safe block RPC routines

blockResponse *
block_delete_1(blockDelete *argp, CLIENT *clnt)
{
        static blockResponse clnt_res; <<<<<<-------- Same memory is used by everyone

        memset((char *)&clnt_res, 0, sizeof(clnt_res)); <<<<<---- Here memset is happening
        if (clnt_call (clnt, BLOCK_DELETE,
                (xdrproc_t) xdr_blockDelete, (caddr_t) argp,
                (xdrproc_t) xdr_blockResponse, (caddr_t) &clnt_res,
                TIMEOUT) != RPC_SUCCESS) {
                return (NULL);
        }
        return (&clnt_res); <<<<<---- ptr to this memory is returned.
}

So while Thread-1 is returned "return (&clnt_res);" another thread could be
doing "memset((char *)&clnt_res, 0, sizeof(clnt_res));"

This seem to be a day-1 gluster-blockd bug from the looks of it.

Change-Id: I3fc76d7814c4fe5b286577586ec44d752dcc73f0
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>

0 files changed, 0 insertions, 0 deletions