[ovs-git] Open vSwitch: datapath: supply a dummy err_handler of gre_cisco_protocol to prevent kernel crash (branch-2.1)

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- Log -----------------------------------------------------------------
commit 14e89a8d277e2d02762a087938443fda50418ecb
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=14e89a8d277e2d02762a087938443fda50418ecb
Author: Wei Zhang <asuka.com at 163.com>
		
datapath: supply a dummy err_handler of gre_cisco_protocol to prevent kernel crash
		
When use gre vport, openvswitch register a gre_cisco_protocol but
does not supply a err_handler with it. The gre_cisco_err() in
net/ipv4/gre_demux.c expect err_handler be provided with the
gre_cisco_protocol implementation, and call ->err_handler() without
existence check, cause the kernel crash.

This patch provide a err_handler to fix this bug.

Signed-off-by: Wei Zhang <asuka.com at 163.com>
Signed-off-by: Jesse Gross <jesse at nicira.com>


-----------------------------------------------------------------------

Summary of changes:
 datapath/linux/compat/include/net/gre.h |    2 ++
 datapath/vport-gre.c                    |   20 ++++++++++++++++++++
 2 files changed, 22 insertions(+)


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