Commit 6323a3ec authored Sep 08, 2021 by Sukadev Bhattiprolu Committed by Greg Kroah-Hartman Sep 22, 2021

ibmvnic: check failover_pending in login response



commit 273c29e944bda9a20a30c26cfc34c9a3f363280b upstream.

If a failover occurs before a login response is received, the login
response buffer maybe undefined. Check that there was no failover
before accessing the login response buffer.

Fixes: 032c5e82 ("Driver for IBM System i/p VNIC protocol")
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 533ef996

drivers/net/ethernet/ibm/ibmvnic.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -4038,6 +4038,14 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
		return 0;
		}

		if (adapter->failover_pending) {
		adapter->init_done_rc = -EAGAIN;
		netdev_dbg(netdev, "Failover pending, ignoring login response\n");
		complete(&adapter->init_done);
		/* login response buffer will be released on reset */
		return 0;
		}

		netdev->mtu = adapter->req_mtu - ETH_HLEN;

		netdev_dbg(adapter->netdev, "Login Response Buffer:\n");