linux-kernel - [PATCH 5.18 127/231] ima: Fix potential memory leak in ima_init

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Message-Id: <20220719114725.132383911@linuxfoundation.org>
Date:   Tue, 19 Jul 2022 13:53:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jianglei Nie <niejianglei2021@....com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 127/231] ima: Fix potential memory leak in ima_init_crypto()

From: Jianglei Nie <niejianglei2021@....com>

[ Upstream commit 067d2521874135267e681c19d42761c601d503d6 ]

On failure to allocate the SHA1 tfm, IMA fails to initialize and exits
without freeing the ima_algo_array. Add the missing kfree() for
ima_algo_array to avoid the potential memory leak.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
Fixes: 6d94809af6b0 ("ima: Allocate and initialize tfm for each PCR bank")
Signed-off-by: Mimi Zohar <zohar@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 security/integrity/ima/ima_crypto.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index a7206cc1d7d1..64499056648a 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -205,6 +205,7 @@ int __init ima_init_crypto(void)
 
 		crypto_free_shash(ima_algo_array[i].tfm);
 	}
+	kfree(ima_algo_array);
 out:
 	crypto_free_shash(ima_shash_tfm);
 	return rc;
-- 
2.35.1