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openvswitch: Fix kernel panic on ovs_flow_free

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Both mega flow mask's reference counter and per flow table mask list
should only be accessed when holding ovs_mutex() lock. However
this is not true with ovs_flow_table_flush(). The patch fixes this bug.

Reported-by: Joe Stringer <joestringer@nicira.com>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Andy Zhou 2014-01-21 09:31:04 -08:00 • committed by Jesse Gross
parent aea0bb4f8e
commit e80857cce8
3 changed files with 48 additions and 49 deletions
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2
net/openvswitch/flow_table.h
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@ -60,7 +60,7 @@ void ovs_flow_free(struct sw_flow *, bool deferred);
int ovs_flow_tbl_init(struct flow_table *);
int ovs_flow_tbl_count(struct flow_table *table);
void ovs_flow_tbl_destroy(struct flow_table *table);
void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred);
int ovs_flow_tbl_flush(struct flow_table *flow_table);
int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,