From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B9A5F1D6BA for ; Wed, 4 Oct 2023 18:34:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Ays9UR7A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B142C433CA; Wed, 4 Oct 2023 18:34:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1696444453; bh=ZGkzdKJ65adkR+pcci+EKjRxW7o0SS9LPgaMeBSvru4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ays9UR7A9Y3YTnHQ4P58Gi7Lny0HnwJtE16y16bYeN+rEFlsZ+Xiokv06R1amfJBe kzOgszQ77A23GxQ9OW08mj5FPDzqQPi53/xz5JMBZCnhNUUFscDvyu17mXZV8du44N cnTW7X5Btu/JZi6h/RCFZbUY6BZBXCV0WrWo/IFE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tianjia Zhang , Herbert Xu Subject: [PATCH 6.5 256/321] crypto: sm2 - Fix crash caused by uninitialized context Date: Wed, 4 Oct 2023 19:56:41 +0200 Message-ID: <20231004175241.126277021@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231004175229.211487444@linuxfoundation.org> References: <20231004175229.211487444@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tianjia Zhang commit 21155620fbf2edbb071144894ff9d67ba9a1faa0 upstream. In sm2_compute_z_digest() function, the newly allocated structure mpi_ec_ctx is used, but forget to initialize it, which will cause a crash when performing subsequent operations. Fixes: e5221fa6a355 ("KEYS: asymmetric: Move sm2 code into x509_public_key") Cc: stable@vger.kernel.org # v6.5 Signed-off-by: Tianjia Zhang Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- crypto/sm2.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/crypto/sm2.c b/crypto/sm2.c index 285b3cb7c0bc..5ab120d74c59 100644 --- a/crypto/sm2.c +++ b/crypto/sm2.c @@ -278,10 +278,14 @@ int sm2_compute_z_digest(struct shash_desc *desc, if (!ec) return -ENOMEM; - err = __sm2_set_pub_key(ec, key, keylen); + err = sm2_ec_ctx_init(ec); if (err) goto out_free_ec; + err = __sm2_set_pub_key(ec, key, keylen); + if (err) + goto out_deinit_ec; + bits_len = SM2_DEFAULT_USERID_LEN * 8; entl[0] = bits_len >> 8; entl[1] = bits_len & 0xff; -- 2.42.0