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ibmvnic: check failover_pending in login response

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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: 032c5e8284 ("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>
This commit is contained in:
Sukadev Bhattiprolu 2021-09-08 09:58:20 -07:00 committed by Greg Kroah-Hartman
parent d3939844eb
commit 235f782d5e
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ethernet/ibm/ibmvnic.c
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@ -4277,6 +4277,14 @@ 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");