From: "Stephan Müller" <smueller@chronox.de>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: davem@davemloft.net, herbert@gondor.apana.org.au,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com,
syzbot <syzbot+2e635807decef724a1fa@syzkaller.appspotmail.com>
Subject: [PATCH v2] crypto: DRBG - always try to free Jitter RNG instance
Date: Thu, 04 Jun 2020 08:41:00 +0200 [thread overview]
Message-ID: <2551009.mvXUDI8C0e@positron.chronox.de> (raw)
In-Reply-To: <20200603110919.GK30374@kadam>
The Jitter RNG is unconditionally allocated as a seed source follwoing
the patch 97f2650e5040. Thus, the instance must always be deallocated.
Reported-by: syzbot+2e635807decef724a1fa@syzkaller.appspotmail.com
Fixes: 97f2650e5040 ("crypto: drbg - always seeded with SP800-90B ...")
Signed-off-by: Stephan Mueller <smueller@chronox.de>
---
crypto/drbg.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/crypto/drbg.c b/crypto/drbg.c
index 37526eb8c5d5..8a0f16950144 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1631,6 +1631,9 @@ static int drbg_uninstantiate(struct drbg_state *drbg)
if (drbg->random_ready.func) {
del_random_ready_callback(&drbg->random_ready);
cancel_work_sync(&drbg->seed_work);
+ }
+
+ if (!IS_ERR_OR_NULL(drbg->jent)) {
crypto_free_rng(drbg->jent);
drbg->jent = NULL;
}
--
2.26.2
next prev parent reply other threads:[~2020-06-04 6:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 3:41 memory leak in crypto_create_tfm syzbot
2020-06-03 3:55 ` Eric Biggers
2020-06-03 8:08 ` [PATCH] crypto: DRBG - always try to free Jitter RNG instance Stephan Müller
2020-06-03 11:09 ` Dan Carpenter
2020-06-03 11:40 ` Stephan Mueller
2020-06-04 6:41 ` Stephan Müller [this message]
2020-06-05 0:43 ` [PATCH v2] " Eric Biggers
2020-06-05 5:58 ` Stephan Mueller
2020-06-05 6:16 ` Eric Biggers
2020-06-05 6:52 ` Stephan Mueller
2020-06-05 16:21 ` Eric Biggers
2020-06-07 13:07 ` Stephan Müller
2020-06-07 13:20 ` [PATCH v3] " Stephan Müller
2020-06-12 6:49 ` Herbert Xu
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