linux-kernel - [PATCH 1/2] random: access primary_pool directly rather than through pointer

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 30 Jan 2022 22:03:19 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     tytso@....edu, Jason@...c4.com
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        Dominik Brodowski <linux@...inikbrodowski.net>
Subject: [PATCH 1/2] random: access primary_pool directly rather than through pointer

Both crng_initialize_primary() and crng_init_try_arch_early() are
only called for the primary_pool. Accessing it directly instead of
through a function parameter simplifies the code.

Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>
---
 drivers/char/random.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 68613f0b6887..d332054bbbb6 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -762,7 +762,7 @@ static bool crng_init_try_arch(struct crng_state *crng)
 	return arch_init;
 }
 
-static bool __init crng_init_try_arch_early(struct crng_state *crng)
+static bool __init crng_init_try_arch_early(void)
 {
 	int i;
 	bool arch_init = true;
@@ -774,7 +774,7 @@ static bool __init crng_init_try_arch_early(struct crng_state *crng)
 			rv = random_get_entropy();
 			arch_init = false;
 		}
-		crng->state[i] ^= rv;
+		primary_crng.state[i] ^= rv;
 	}
 
 	return arch_init;
@@ -788,16 +788,16 @@ static void crng_initialize_secondary(struct crng_state *crng)
 	crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
 }
 
-static void __init crng_initialize_primary(struct crng_state *crng)
+static void __init crng_initialize_primary(void)
 {
-	_extract_entropy(&crng->state[4], sizeof(u32) * 12);
-	if (crng_init_try_arch_early(crng) && trust_cpu && crng_init < 2) {
+	_extract_entropy(&primary_crng.state[4], sizeof(u32) * 12);
+	if (crng_init_try_arch_early() && trust_cpu && crng_init < 2) {
 		invalidate_batched_entropy();
 		numa_crng_init();
 		crng_init = 2;
 		pr_notice("crng init done (trusting CPU's manufacturer)\n");
 	}
-	crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
+	primary_crng.init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
 }
 
 static void crng_finalize_init(struct crng_state *crng)
@@ -1698,7 +1698,7 @@ int __init rand_initialize(void)
 	init_std_data();
 	if (crng_need_final_init)
 		crng_finalize_init(&primary_crng);
-	crng_initialize_primary(&primary_crng);
+	crng_initialize_primary();
 	crng_global_init_time = jiffies;
 	if (ratelimit_disable) {
 		urandom_warning.interval = 0;
-- 
2.35.1