linux-kernel - [PATCH 4/6] ima: check result of crypto_shash_update() in ima_calc_field_array_hash

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Date:	Fri, 15 Nov 2013 14:45:42 +0100
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	linux-security-module@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	linux-ima-devel@...ts.sourceforge.net, zohar@...ibm.com,
	d.kasatkin@...sung.com, james.l.morris@...cle.com,
	Roberto Sassu <roberto.sassu@...ito.it>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Subject: [PATCH 4/6] ima: check result of crypto_shash_update() in ima_calc_field_array_hash_tfm

This patch adds a check of the result from the first crypto_shash_update()
in ima_calc_field_array_hash_tfm().

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>
---
 security/integrity/ima/ima_crypto.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index 676e029..e22708b 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -163,6 +163,9 @@ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data,
 		rc = crypto_shash_update(&desc.shash,
 					 (const u8 *) &field_data[i].len,
 					 sizeof(field_data[i].len));
+		if (rc)
+			break;
+
 		rc = crypto_shash_update(&desc.shash, field_data[i].data,
 					 field_data[i].len);
 		if (rc)
-- 
1.8.1.4


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