Re: BUG: NULL pointer dereference at ib_uverbs_comp_handler+0x20

From: Jason Gunthorpe
Date: Tue Aug 01 2017 - 15:29:29 EST

On Tue, Aug 01, 2017 at 12:32:57PM -0600, Logan Gunthorpe wrote:
> Couldn't create rdma QP - Invalid argument
> Unable to create QP.
> Failed to create QP.

Failing to create a QP makes me wonder if you have have this patch?

Subject: [PATCH v2 1/2] RDMA/uverbs: Fix the check for port number

The port number is only valid if IB_QP_PORT is set in the mask.
So only check port number if it is valid to prevent modify_qp from
failing due to an invalid port number.

Fixes: 5ecce4c9b17b("Check port number supplied by user verbs cmds")
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.14+
Reviewed-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>