Re: [PATCH for-next] RDMA/rxe: Fix packet length checks

[Jason Gunthorpe <jgg@nvidia.com>]

On Wed, May 17, 2023 at 12:22:42PM -0500, Bob Pearson wrote:
> In rxe_net.c a received packet, from udp or loopback, is passed
> to rxe_rcv() in rxe_recv.c as a udp packet. I.e. skb->data is
> pointing at the udp header. But rxe_rcv() makes length checks
> to verify the packet is long enough to hold the roce headers as
> if it were a roce packet. I.e. skb->data pointing at the bth
> header. A runt packet would appear to have 8 more bytes than it
> actually does which may lead to incorrect behavior.
> 
> This patch calls skb_pull() to adjust the skb to point at the
> bth header before calling rxe_rcv() which fixes this error.
> 
> Fixes: 8700e3e7c485 ("Soft RoCE driver")
> Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
> ---
>  drivers/infiniband/sw/rxe/rxe_net.c | 6 ++++++
>  1 file changed, 6 insertions(+)

Applied to for-rc, thanks

Jason