From: Sukadev Bhattiprolu sukadev@linux.ibm.com
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: 032c5e82847a ("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 --- drivers/net/ethernet/ibm/ibmvnic.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2527,6 +2527,14 @@ static int handle_login_rsp(union ibmvni 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_dbg(adapter->netdev, "Login Response Buffer:\n"); for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { netdev_dbg(adapter->netdev, "%016lx\n",