linux-kernel - [PATCH v1 2/2] certs: Remove panic() calls from system_trusted_keyring

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Date:   Fri, 11 Mar 2022 18:47:41 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Jarkko Sakkinen <jarkko@...nel.org>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Snowberg <eric.snowberg@...cle.com>,
        Mickaël Salaün <mic@...ux.microsoft.com>,
        Paul Moore <paul@...l-moore.com>, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/2] certs: Remove panic() calls from system_trusted_keyring_init()

From: Mickaël Salaün <mic@...ux.microsoft.com>

Replace panic() calls from device_initcall(system_trusted_keyring_init)
with proper error handling using -ENODEV.

Suggested-by: Jarkko Sakkinen <jarkko@...nel.org> [1]
Link: https://lore.kernel.org/r/Yik0C2t7G272YZ73@iki.fi [1]
Signed-off-by: Mickaël Salaün <mic@...ux.microsoft.com>
Link: https://lore.kernel.org/r/20220311174741.250424-3-mic@digikod.net
---
 certs/system_keyring.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index 05b66ce9d1c9..428046a7aa7f 100644
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -148,8 +148,10 @@ static __init int system_trusted_keyring_init(void)
 			      KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
 			      KEY_ALLOC_NOT_IN_QUOTA,
 			      NULL, NULL);
-	if (IS_ERR(builtin_trusted_keys))
-		panic("Can't allocate builtin trusted keyring\n");
+	if (IS_ERR(builtin_trusted_keys)) {
+		pr_err("Can't allocate builtin trusted keyring\n");
+		return -ENODEV;
+	}
 
 #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
 	secondary_trusted_keys =
@@ -161,14 +163,26 @@ static __init int system_trusted_keyring_init(void)
 			      KEY_ALLOC_NOT_IN_QUOTA,
 			      get_builtin_and_secondary_restriction(),
 			      NULL);
-	if (IS_ERR(secondary_trusted_keys))
-		panic("Can't allocate secondary trusted keyring\n");
+	if (IS_ERR(secondary_trusted_keys)) {
+		pr_err("Can't allocate secondary trusted keyring\n");
+		goto err_secondary;
+	}
 
-	if (key_link(secondary_trusted_keys, builtin_trusted_keys) < 0)
-		panic("Can't link trusted keyrings\n");
+	if (key_link(secondary_trusted_keys, builtin_trusted_keys) < 0) {
+		pr_err("Can't link trusted keyrings\n");
+		goto err_link;
+	}
 #endif
 
 	return 0;
+
+err_link:
+	key_put(secondary_trusted_keys);
+
+err_secondary:
+	key_put(builtin_trusted_keys);
+
+	return -ENODEV;
 }
 
 /*
-- 
2.35.1