From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 5B061343893; Sat, 12 Sep 2026 09:46:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206398; cv=none; b=PiFNHFG/ne2E2epMIKUsssE+9cBFtbVtR7LWXwNONlrwQFPx5hvGKVneFGtoRrqkauvm2Ij7+fnHvmXtrvsLGLthLJGxcbEd/J73bHWGbd8JFH3i1PLMrBB4eiKcIZN8aWlHEGBdBK2aZoqibTIFrA6Ic6cXlHHS3GR6fF4Lvc0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206398; c=relaxed/simple; bh=UwGTS5s9ZmM83947/9pq2xHKMQ6eRZKPw3/ck1d4kGA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Fml4wykXH0s4jODJ7arZoZQNp6Zi11Ny1GF3KP11dtK7BcyiPOcDzKG7Sr31UMMLWbwMBXoEQkc6Qtl6TuO+9ihAhnBa+cpldSDcWl6JynadbvOkAfTLfQHaFFcgjLNINjwnxN5pmTUS6bzRYXdxKH4b3thSGyMeZ0Rk4APWDAI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WVSX3aoK; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WVSX3aoK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAA4C1F000FF; Sat, 12 Sep 2026 09:46:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789206396; bh=xCeDZEQnzwmEYV+8P9QbOIa4JC9Y81XflzyAvfrxipA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WVSX3aoKAhcbNPlWfTbvqqhZi42KKDpj43+kWUmA6WGOZ/shtPRoDgDs9er1zAodY uRcdmFYy2LeDE5XmeEgm7L+7eQ7qXDicORRwCpbBSFjy38BaKrPDtvRKCAe2o1II6d X67iDW7C2Su61jNOPu1JEsPdn+mzQMoCtuCgVvoI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Giovanni Cabiddu , Ahsan Atta , Herbert Xu , Sasha Levin Subject: [PATCH 6.18 0200/1518] crypto: qat - clear AES key schedule from stack Date: Sat, 12 Sep 2026 08:39:29 +0200 Message-ID: <20260912065628.012966333@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@linuxfoundation.org> User-Agent: quilt/0.69 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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Giovanni Cabiddu [ Upstream commit d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9 ] qat_alg_xts_reverse_key() expands the forward XTS AES key on the stack. That schedule contains key material and can remain in the stack frame. Clear the temporary crypto_aes_ctx with memzero_explicit() after the copy. Fixes: 5106dfeaeabe ("crypto: qat - add AES-XTS support for QAT GEN4 devices") Signed-off-by: Giovanni Cabiddu Reviewed-by: Ahsan Atta Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/intel/qat/qat_common/qat_algs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/crypto/intel/qat/qat_common/qat_algs.c b/drivers/crypto/intel/qat/qat_common/qat_algs.c index 7f638a62e3ade..91663805d9e60 100644 --- a/drivers/crypto/intel/qat/qat_common/qat_algs.c +++ b/drivers/crypto/intel/qat/qat_common/qat_algs.c @@ -405,6 +405,7 @@ static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen, memcpy(key_reverse + AES_BLOCK_SIZE, key - AES_BLOCK_SIZE, AES_BLOCK_SIZE); } + memzero_explicit(&aes_expanded, sizeof(aes_expanded)); } static void qat_alg_skcipher_init_dec(struct qat_alg_skcipher_ctx *ctx, -- 2.53.0