From: Chris J Arges <chris.j.ar...@canonical.com>
Upstream commit:
openvswitch: allocate nr_node_ids flow_stats instead of num_possible_nodes
Some architectures like POWER can have a NUMA node_possible_map that
contains sparse entries. This causes memory corruption with openvswitch
since it allocates flow_cache with a multiple of num_possible_nodes() and
assumes the node variable returned by for_each_node will index into
flow->stats[node].
Use nr_node_ids to allocate a maximal sparse array instead of
num_possible_nodes().
The crash was noticed after 3af229f2 was applied as it changed the
node_possible_map to match node_online_map on boot.
Fixes: 3af229f2071f5b5cb31664be6109561fbe19c861
Signed-off-by: Chris J Arges <chris.j.ar...@canonical.com>
Acked-by: Pravin B Shelar <pshe...@nicira.com>
Acked-by: Nishanth Aravamudan <n...@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Upstream: bac541e4631(""openvswitch: allocate nr_node_ids flow_stats
instead of num_possible_nodes")
Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
---
datapath/flow_table.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/datapath/flow_table.c b/datapath/flow_table.c
index 409f9dd..c76f2a1 100644
--- a/datapath/flow_table.c
+++ b/datapath/flow_table.c
@@ -988,7 +988,7 @@ int ovs_flow_init(void)
BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow)
- + (num_possible_nodes()
+ + (nr_node_ids
* sizeof(struct flow_stats *)),
0, 0, NULL);
if (flow_cache == NULL)
--
1.7.1
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