git: 70439285ad9d - main - crypto: hide crypto_destroyreq behind a tunable

The branch main has been updated by mjg:

URL: https://cgit.FreeBSD.org/src/commit/?id=70439285ad9d5ec8ebdb1cf8617e8f30ea31b2e2

commit 70439285ad9d5ec8ebdb1cf8617e8f30ea31b2e2
Author:     Mateusz Guzik <mjg@FreeBSD.org>
AuthorDate: 2022-02-16 07:45:12 +0000
Commit:     Mateusz Guzik <mjg@FreeBSD.org>
CommitDate: 2022-02-16 07:45:12 +0000

    crypto: hide crypto_destroyreq behind a tunable
    
    Reviewed by:    jhb, markj
    Sponsored by:   Rubicon Communications, LLC ("Netgate")
    Differential Revision:  https://reviews.freebsd.org/D32084
---
 sys/opencrypto/crypto.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sys/opencrypto/crypto.c b/sys/opencrypto/crypto.c
index 0b2c250a7af2..fde1316595e5 100644
--- a/sys/opencrypto/crypto.c
+++ b/sys/opencrypto/crypto.c
@@ -202,6 +202,13 @@ SYSCTL_INT(_kern, OID_AUTO, cryptodevallowsoft, CTLFLAG_RWTUN,
 	   "Enable/disable use of software crypto by /dev/crypto");
 #endif
 
+#ifdef DIAGNOSTIC
+bool crypto_destroyreq_check;
+SYSCTL_BOOL(_kern_crypto, OID_AUTO, destroyreq_check, CTLFLAG_RWTUN,
+	   &crypto_destroyreq_check, 0,
+	   "Enable checks when destroying a request");
+#endif
+
 MALLOC_DEFINE(M_CRYPTO_DATA, "crypto", "crypto session records");
 
 static	void crypto_dispatch_thread(void *arg);
@@ -1580,6 +1587,9 @@ crypto_destroyreq(struct cryptop *crp)
 		struct cryptop *crp2;
 		struct crypto_ret_worker *ret_worker;
 
+		if (!crypto_destroyreq_check)
+			return;
+
 		CRYPTO_Q_LOCK();
 		TAILQ_FOREACH(crp2, &crp_q, crp_next) {
 			KASSERT(crp2 != crp,