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From: David Howells <dhowells@redhat.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: Denis Efremov <efremov@linux.com>,
	dhowells@redhat.com, keyrings@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 04/18] security/keys: use kvfree_sensitive()
Date: Wed, 09 Dec 2020 12:14:57 +0000	[thread overview]
Message-ID: <160751609699.1238376.10901466590541653794.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <160751606428.1238376.14935502103503420781.stgit@warthog.procyon.org.uk>

From: Denis Efremov <efremov@linux.com>

Use kvfree_sensitive() instead of open-coding it.

Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---

 security/keys/big_key.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/security/keys/big_key.c b/security/keys/big_key.c
index 691347dea3c1..d17e5f09eeb8 100644
--- a/security/keys/big_key.c
+++ b/security/keys/big_key.c
@@ -121,8 +121,7 @@ int big_key_preparse(struct key_preparsed_payload *prep)
 		*path = file->f_path;
 		path_get(path);
 		fput(file);
-		memzero_explicit(buf, enclen);
-		kvfree(buf);
+		kvfree_sensitive(buf, enclen);
 	} else {
 		/* Just store the data in a buffer */
 		void *data = kmalloc(datalen, GFP_KERNEL);
@@ -140,8 +139,7 @@ int big_key_preparse(struct key_preparsed_payload *prep)
 err_enckey:
 	kfree_sensitive(enckey);
 error:
-	memzero_explicit(buf, enclen);
-	kvfree(buf);
+	kvfree_sensitive(buf, enclen);
 	return ret;
 }
 
@@ -273,8 +271,7 @@ long big_key_read(const struct key *key, char *buffer, size_t buflen)
 err_fput:
 		fput(file);
 error:
-		memzero_explicit(buf, enclen);
-		kvfree(buf);
+		kvfree_sensitive(buf, enclen);
 	} else {
 		ret = datalen;
 		memcpy(buffer, key->payload.data[big_key_data], datalen);



  parent reply	other threads:[~2020-12-09 12:21 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-09 12:14 [PATCH 00/18] keys: Miscellaneous fixes David Howells
2020-12-09 12:14 ` [PATCH 01/18] security: keys: Fix fall-through warnings for Clang David Howells
2020-12-09 12:14 ` [PATCH 02/18] keys: Remove outdated __user annotations David Howells
2020-12-09 12:14 ` [PATCH 03/18] watch_queue: Drop references to /dev/watch_queue David Howells
2020-12-09 12:14 ` David Howells [this message]
2020-12-09 12:15 ` [PATCH 05/18] KEYS: asymmetric: Fix kerneldoc David Howells
2020-12-09 12:15 ` [PATCH 06/18] security: keys: delete repeated words in comments David Howells
2020-12-09 12:15 ` [PATCH 07/18] KEYS: remove redundant memset David Howells
2020-12-09 19:07   ` Ben Boeckel
2020-12-10  9:21   ` David Howells
2020-12-09 12:15 ` [PATCH 08/18] crypto: asymmetric_keys: fix some comments in pkcs7_parser.h David Howells
2020-12-09 12:15 ` [PATCH 09/18] encrypted-keys: Replace HTTP links with HTTPS ones David Howells
2020-12-09 12:15 ` [PATCH 10/18] PKCS#7: drop function from kernel-doc pkcs7_validate_trust_one David Howells
2020-12-09 12:15 ` [PATCH 11/18] crypto: pkcs7: Use match_string() helper to simplify the code David Howells
2020-12-09 12:15 ` [PATCH 12/18] keys: remove trailing semicolon in macro definition David Howells
2020-12-09 12:16 ` [PATCH 13/18] crypto: public_key: Remove redundant header file from public_key.h David Howells
2020-12-09 12:16 ` [PATCH 14/18] certs/blacklist: fix kernel doc interface issue David Howells
2020-12-09 12:16 ` [PATCH 15/18] certs: Fix blacklisted hexadecimal hash string check David Howells
2020-12-09 12:16 ` [PATCH 16/18] PKCS#7: Fix missing include David Howells
2020-12-09 12:16 ` [PATCH 17/18] certs: Fix blacklist flag type confusion David Howells
2020-12-09 12:16 ` [PATCH 18/18] certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID David Howells
2020-12-09 19:12 ` [PATCH 00/18] keys: Miscellaneous fixes Ben Boeckel
2020-12-10  9:30 ` David Howells
2020-12-11  8:17 ` Jarkko Sakkinen
2020-12-11 10:51 ` Jarkko Sakkinen
2020-12-11 10:56   ` Jarkko Sakkinen
2021-02-18 16:24 ` [PATCH 17/18] certs: Fix blacklist flag type confusion David Howells
2021-02-18 19:30   ` Mickaël Salaün
2021-02-18 22:55   ` David Howells
2021-02-19  9:43     ` Mickaël Salaün
2021-02-19  9:31   ` Jarkko Sakkinen
2021-02-19  9:45   ` David Howells
2021-02-19  9:50     ` Mickaël Salaün

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