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resolv: Serialize processing in resolv/tst-resolv-txnid-collision

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When switching name servers, response processing by two server
threads clobbers the global test state.  (There is still some
risk that this test is negatively impact by packet drops and
packet reordering, but this applies to many of the resolver tests
and is difficult to avoid.)

Fixes commit f1f00c0721 ("resolv:
Handle transaction ID collisions in parallel queries (bug 26600)").
This commit is contained in:
Florian Weimer
2020-10-15 12:33:13 +02:00
parent d3a5ae6ad1
commit b8b53b338f
1 changed files with 5 additions and 0 deletions
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5
resolv/tst-resolv-txnid-collision.c
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@ -309,6 +309,11 @@ do_test (void)
((struct resolv_redirect_config) ((struct resolv_redirect_config)
{ {
.response_callback = response, .response_callback = response,
/* The response callback use global state (the previous_*
variables), and query processing must therefore be
serialized. */
.single_thread_udp = true,
}); });
for (int rcode = 0; rcode <= 5; ++rcode) for (int rcode = 0; rcode <= 5; ++rcode)