On 2/22/2018 1:40 PM, Sowmini Varadhan wrote:
if either or both of MSG_ZEROCOPY and SOCK_ZEROCOPY have not been
specified, the rm->data.op_mmp_znotifier allocation will be skipped.
In this case, it is invalid ot pass down a cmsghdr with
RDS_CMSG_ZCOPY_COOKIE, so return EINVAL from rds_msg_zcopy for this

Reported-by: syzbot+f893ae7bb2f6456df...@syzkaller.appspotmail.com
Fixes: 0cebaccef3ac ("rds: zerocopy Tx support.")
Signed-off-by: Sowmini Varadhan <sowmini.varad...@oracle.com>

Acked-by: Santosh Shilimkar <santosh.shilim...@oracle.com>

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