linux-kernel - [PATCH 5.4 395/434] KEYS: asymmetric: return ENOMEM if akcipher_request

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Date:   Sun, 29 Dec 2019 18:27:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        James Morris <jamorris@...ux.microsoft.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Subject: [PATCH 5.4 395/434] KEYS: asymmetric: return ENOMEM if akcipher_request_alloc() fails

From: Eric Biggers <ebiggers@...gle.com>

commit bea37414453eb08d4ceffeb60a9d490dbc930cea upstream.

No error code was being set on this error path.

Cc: stable@...r.kernel.org
Fixes: ad4b1eb5fb33 ("KEYS: asym_tpm: Implement encryption operation [ver #2]")
Fixes: c08fed737126 ("KEYS: Implement encrypt, decrypt and sign for software asymmetric key [ver #2]")
Reviewed-by: James Morris <jamorris@...ux.microsoft.com>
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/asymmetric_keys/asym_tpm.c   |    1 +
 crypto/asymmetric_keys/public_key.c |    1 +
 2 files changed, 2 insertions(+)

--- a/crypto/asymmetric_keys/asym_tpm.c
+++ b/crypto/asymmetric_keys/asym_tpm.c
@@ -486,6 +486,7 @@ static int tpm_key_encrypt(struct tpm_ke
 	if (ret < 0)
 		goto error_free_tfm;
 
+	ret = -ENOMEM;
 	req = akcipher_request_alloc(tfm, GFP_KERNEL);
 	if (!req)
 		goto error_free_tfm;
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -184,6 +184,7 @@ static int software_key_eds_op(struct ke
 	if (IS_ERR(tfm))
 		return PTR_ERR(tfm);
 
+	ret = -ENOMEM;
 	req = akcipher_request_alloc(tfm, GFP_KERNEL);
 	if (!req)
 		goto error_free_tfm;