Merge tag 'irqchip-fixes-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip fixes from Marc Zyngier:

 - Fix atomicity of affinity update in the GIC driver
 - Don't sleep in atomic when waiting for a GICv4.1 RD to respond
 - Fix a couple of typos in user-visible messages

1 files changed, 22 insertions, 8 deletions

diff --git a/crypto/drbg.c b/crypto/drbg.c
index b6929eb5..37526eb8 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1087,10 +1087,6 @@ static void drbg_async_seed(struct work_struct *work)
 	if (ret)
 		goto unlock;
 
-	/* If nonblocking pool is initialized, deactivate Jitter RNG */
-	crypto_free_rng(drbg->jent);
-	drbg->jent = NULL;
-
 	/* Set seeded to false so that if __drbg_seed fails the
 	 * next generate call will trigger a reseed.
 	 */
@@ -1168,7 +1164,23 @@ static int drbg_seed(struct drbg_state *drbg, struct drbg_string *pers,
 						   entropylen);
 			if (ret) {
 				pr_devel("DRBG: jent failed with %d\n", ret);
-				goto out;
+
+				/*
+				 * Do not treat the transient failure of the
+				 * Jitter RNG as an error that needs to be
+				 * reported. The combined number of the
+				 * maximum reseed threshold times the maximum
+				 * number of Jitter RNG transient errors is
+				 * less than the reseed threshold required by
+				 * SP800-90A allowing us to treat the
+				 * transient errors as such.
+				 *
+				 * However, we mandate that at least the first
+				 * seeding operation must succeed with the
+				 * Jitter RNG.
+				 */
+				if (!reseed || ret != -EAGAIN)
+					goto out;
 			}
 
 			drbg_string_fill(&data1, entropy, entropylen * 2);
@@ -1294,8 +1306,10 @@ static inline int drbg_alloc_state(struct drbg_state *drbg)
 	if (IS_ENABLED(CONFIG_CRYPTO_FIPS)) {
 		drbg->prev = kzalloc(drbg_sec_strength(drbg->core->flags),
 				     GFP_KERNEL);
-		if (!drbg->prev)
+		if (!drbg->prev) {
+			ret = -ENOMEM;
 			goto fini;
+		}
 		drbg->fips_primed = false;
 	}
 
@@ -1492,6 +1506,8 @@ static int drbg_prepare_hrng(struct drbg_state *drbg)
 	if (list_empty(&drbg->test_data.list))
 		return 0;
 
+	drbg->jent = crypto_alloc_rng("jitterentropy_rng", 0, 0);
+
 	INIT_WORK(&drbg->seed_work, drbg_async_seed);
 
 	drbg->random_ready.owner = THIS_MODULE;
@@ -1512,8 +1528,6 @@ static int drbg_prepare_hrng(struct drbg_state *drbg)
 		return err;
 	}
 
-	drbg->jent = crypto_alloc_rng("jitterentropy_rng", 0, 0);
-
 	/*
 	 * Require frequent reseeds until the seed source is fully
 	 * initialized.