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Add rcu_barrier() to isc__log_shutdown()

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There is a data race when QP is reclaiming chunks on the call_rcu
threads and it tries to log the number of reclaimed chunks while the
server is shuttingdown.  Workaround this by adding rcu_barrier() before
shuttingdown the global log context.
This commit is contained in:
Ondřej Surý 2025-07-24 11:02:15 +02:00
parent f7e5c1db38
commit f2e107508a
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1 changed files with 8 additions and 0 deletions
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8
lib/isc/log.c
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@ -1573,6 +1573,14 @@ isc__log_initialize(void) {
void
isc__log_shutdown(void) {
/*
* There is a data race when the QP database reclaims chunks on the
* call_rcu threads and tries to log the number of reclaimed chunks
* while the server is shutting down. Work around this by adding
* an rcu_barrier() before shutting down the global logging context.
*/
rcu_barrier();
REQUIRE(VALID_CONTEXT(isc__lctx));
isc_mem_t *mctx = isc__lctx->mctx;