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Miller" , Jakub Kicinski , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] mac80211: Check crypto_aead_encrypt for errors Date: Tue, 9 Mar 2021 12:41:36 -0800 Message-Id: <20210309204137.823268-1-daniel.phan36@gmail.com> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: panda crypto_aead_encrypt returns <0 on error, so if these calls are not checked, execution may continue with failed encrypts. It also seems that these two crypto_aead_encrypt calls are the only instances in the codebase that are not checked for errors. Signed-off-by: Daniel Phan --- net/mac80211/aead_api.c | 5 +++-- net/mac80211/aes_gmac.c | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/net/mac80211/aead_api.c b/net/mac80211/aead_api.c index d7b3d905d535..b00d6f5b33f4 100644 --- a/net/mac80211/aead_api.c +++ b/net/mac80211/aead_api.c @@ -23,6 +23,7 @@ int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aa= d, size_t aad_len, struct aead_request *aead_req; int reqsize =3D sizeof(*aead_req) + crypto_aead_reqsize(tfm); u8 *__aad; + int ret; =20 aead_req =3D kzalloc(reqsize + aad_len, GFP_ATOMIC); if (!aead_req) @@ -40,10 +41,10 @@ int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *= aad, size_t aad_len, aead_request_set_crypt(aead_req, sg, sg, data_len, b_0); aead_request_set_ad(aead_req, sg[0].length); =20 - crypto_aead_encrypt(aead_req); + ret =3D crypto_aead_encrypt(aead_req); kfree_sensitive(aead_req); =20 - return 0; + return ret; } =20 int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len, diff --git a/net/mac80211/aes_gmac.c b/net/mac80211/aes_gmac.c index 6f3b3a0cc10a..512cab073f2e 100644 --- a/net/mac80211/aes_gmac.c +++ b/net/mac80211/aes_gmac.c @@ -22,6 +22,7 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 = *aad, u8 *nonce, struct aead_request *aead_req; int reqsize =3D sizeof(*aead_req) + crypto_aead_reqsize(tfm); const __le16 *fc; + int ret; =20 if (data_len < GMAC_MIC_LEN) return -EINVAL; @@ -59,10 +60,10 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u= 8 *aad, u8 *nonce, aead_request_set_crypt(aead_req, sg, sg, 0, iv); aead_request_set_ad(aead_req, GMAC_AAD_LEN + data_len); =20 - crypto_aead_encrypt(aead_req); + ret =3D crypto_aead_encrypt(aead_req); kfree_sensitive(aead_req); =20 - return 0; + return ret; } =20 struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 key[], --=20 2.30.1