[ovs-git] Open vSwitch: ofproto-dpif: Disable miss handling in rule_get_stats(). (branch-1.10)

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commit 8fb7eddbcd1a487a883d6c3d96525a944b5a43f0
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=8fb7eddbcd1a487a883d6c3d96525a944b5a43f0
Author: Ethan Jackson <ethan at nicira.com>
		
ofproto-dpif: Disable miss handling in rule_get_stats().
		
rule_get_stats() is often called when iterating over every rule in
the flow table.  To ensure up-to-date statistics, rule_get_stats()
calls push_all_stats() which can cause flow misses to be handled.
When using the learn action, this can cause rules to be added (and
potentially removed) from the OpenFlow table.  This could corrupt
the caller's data structures, leading to a segmentation fault.
This patch fixes the issue by disabling flow miss handling from
within rule_get_stats().

Bug #15999.
Signed-off-by: Ethan Jackson <ethan at nicira.com>


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Summary of changes:
 ofproto/ofproto-dpif.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)


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