[PATCH v3 2/2] app/testpmd: fix aged flow destroy

[Danylo Vodopianov <dvo-plv@napatech.com>]

port_flow_destroy() function never assumed that rule array can be freed
when it's executing, and port_flow_aged() just violated that assumption.

In case of flow async create failure, it tries to do a cleanup, but it
wrongly removes a 1st flow (with id 0). pf->id is not set at this
moment and it always is 0, thus 1st flow is removed. A local copy of
flow->id must be used to call of port_flow_destroy() to avoid access
and processing of flow->id after the flow is removed.

Fixes: de956d5ecf08 ("app/testpmd: support age shared action context")
Cc: stable@dpdk.org

Signed-off-by: Danylo Vodopianov <dvo-plv@napatech.com>
---
 app/test-pmd/config.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index c831166431..28d45568ac 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -4160,8 +4160,10 @@ port_flow_aged(portid_t port_id, uint8_t destroy)
 		}
 		type = (enum age_action_context_type *)contexts[idx];
 		switch (*type) {
-		case ACTION_AGE_CONTEXT_TYPE_FLOW:
+		case ACTION_AGE_CONTEXT_TYPE_FLOW: {
+			uint64_t flow_id;
 			ctx.pf = container_of(type, struct port_flow, age_type);
+			flow_id = ctx.pf->id;
 			printf("%-20s\t%" PRIu64 "\t%" PRIu32 "\t%" PRIu32
 								 "\t%c%c%c\t\n",
 			       "Flow",
@@ -4172,9 +4174,10 @@ port_flow_aged(portid_t port_id, uint8_t destroy)
 			       ctx.pf->rule.attr->egress ? 'e' : '-',
 			       ctx.pf->rule.attr->transfer ? 't' : '-');
 			if (destroy && !port_flow_destroy(port_id, 1,
-							  &ctx.pf->id, false))
+							  &flow_id, false))
 				total++;
 			break;
+		}
 		case ACTION_AGE_CONTEXT_TYPE_INDIRECT_ACTION:
 			ctx.pia = container_of(type,
 					struct port_indirect_action, age_type);
-- 
2.43.5