From nobody Wed Dec 24 01:41:29 2025 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9FE28664A4 for ; Tue, 30 Jan 2024 11:27:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706614079; cv=none; b=Zs0w514ZQekVXl87tH0BMbkdAVhmrr379izf6PZZwzS+A+arWDpJBDUUYYX2OGY0ejAGrD04g8Iz3/X9UnSpGteUvPRZSVPd/kHjho37TcDy9MJxcaaN2jg993lS4juaQo5vQCCYkbgbn+THfljThzUYs74V+P2LXuQ0sBmGLak= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706614079; c=relaxed/simple; bh=VJ3WxFyUH1QX/R2FezaIZrc9SHd0VxU+WMrUCCCzWbA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=E5W0CeLQ7cFLJidXSK9TZCct58eRIqmoIHjnYkQZIoG1CapqtBR9rhqsz3CaKUPcfkvt+lPrwKI18K8Kywf6VVWLoZS2EDaMH6HrQlFNFf0EeXfTEthMZuxp75uXefaITCLHMH11j45OAqs/zp+PaYBsMSTphqKseCOj0rCVHtE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com; spf=pass smtp.mailfrom=bytedance.com; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b=Zhe7aujY; arc=none smtp.client-ip=209.85.214.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bytedance.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b="Zhe7aujY" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-1d71cb97937so20871575ad.3 for ; Tue, 30 Jan 2024 03:27:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1706614076; x=1707218876; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=NFz/ioS5pMtmsywy9UOLGQH2uroA4Qw/qVk4L7fINX0=; b=Zhe7aujYvlLHVtXJZ3kv02iCcmFKPV5YO9MbmC0Mk12po2UQlDHCIGXR+EjbhYwQLU Wa6IatPOH2E73/nhTv8SCStzr8X58TvEgcnKDd9kOn4uVIIDtbH8NTdtR9Jg1WSEOhMh rmJZuCyJ+qS9UDHBu/miZ/kDCu1+7+xbK8PwDsK5RqzJi1Jgb+ObXi8T9KnpdSewo0Uq 4eFeSd348K4Q3lRNCH9aQmZLwREmG6G534N/sQNvbyf7LgXMHkw/uhhHuKLErvmre5yg /5WvLUMAgIZUhLxgmOf1gHazivLfcDnCp6wXI51bKvcgPiG8ons+6yNYHmK6VbAMQ7JL bQqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706614076; x=1707218876; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=NFz/ioS5pMtmsywy9UOLGQH2uroA4Qw/qVk4L7fINX0=; b=Exs/RVrKvuc0bMQeEZH8f9/kZwxOaKSo9CGZiLsu61Qe07TwptyZR04a9QSbLFO8YM 1GSh8mgU1cRBE0GEehcSaf0MSf0iAUn2jWbQzOeY5CQC4hvS9VSdBitanIjtKFr+8f4o V/F2ZmnbdBtwyjM3tijZf6MUuvAt+qCKN09ZVvyBpqkuqeoO0ztIZWzOQVf58NlmlKLt iuyU9LNwsapD36bEN+jbN10l1ZO+PdSoQUEDQLAXXsx7KDPNrZUkEbW2XniabUqskd5l 1CLAAfe55vmxowttLWN4TQ+GNlcsHd0G1lIAmFqB1pWen/rhCQh89GuwSeFCB21KpHgp 4Nhw== X-Gm-Message-State: AOJu0YwBSJUJzSjWs0miKCP84roqxpS8GeLkaVUJ7IskgtZ1AsSOrC7s F1mALiLHPpKu3Q/tCOD73g2tld2IOxFB60E/skpEzvB7HWvTU8ls6lTGaYnXbAA= X-Google-Smtp-Source: AGHT+IFxYQYsZlp0TH8j7NTAhzYbg+/UE/MPq1RYMFL1zOTZBo9xa9ES0Z1wEP85nypj79LLuQ20dw== X-Received: by 2002:a17:903:2692:b0:1d4:4e13:6b59 with SMTP id jf18-20020a170903269200b001d44e136b59mr4044993plb.45.1706614075892; Tue, 30 Jan 2024 03:27:55 -0800 (PST) Received: from always-x1.bytedance.net ([139.177.225.226]) by smtp.gmail.com with ESMTPSA id jz6-20020a170903430600b001d74502d261sm7002041plb.115.2024.01.30.03.27.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jan 2024 03:27:55 -0800 (PST) From: zhenwei pi To: arei.gonglei@huawei.com, mst@redhat.com, jasowang@redhat.com, herbert@gondor.apana.org.au Cc: xuanzhuo@linux.alibaba.com, virtualization@lists.linux.dev, nathan@kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, zhenwei pi Subject: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy Date: Tue, 30 Jan 2024 19:27:40 +0800 Message-Id: <20240130112740.882183-1-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" sizeof(struct virtio_crypto_akcipher_session_para) is less than sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from stack variable leads stack overflow. Clang reports this issue by commands: make -j CC=3Dclang-14 mrproper >/dev/null 2>&1 make -j O=3D/tmp/crypto-build CC=3Dclang-14 allmodconfig >/dev/null 2>&1 make -j O=3D/tmp/crypto-build W=3D1 CC=3Dclang-14 drivers/crypto/virtio/ virtio_crypto_akcipher_algs.o Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm") Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roec= k-us.net/ Signed-off-by: zhenwei pi Acked-by: Jason Wang Acked-by: Michael S. Tsirkin Tested-by: Nathan Chancellor # build --- drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/= crypto/virtio/virtio_crypto_akcipher_algs.c index 2621ff8a9376..de53eddf6796 100644 --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c @@ -104,7 +104,8 @@ static void virtio_crypto_dataq_akcipher_callback(struc= t virtio_crypto_request * } =20 static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_ak= cipher_ctx *ctx, - struct virtio_crypto_ctrl_header *header, void *para, + struct virtio_crypto_ctrl_header *header, + struct virtio_crypto_akcipher_session_para *para, const uint8_t *key, unsigned int keylen) { struct scatterlist outhdr_sg, key_sg, inhdr_sg, *sgs[3]; @@ -128,7 +129,7 @@ static int virtio_crypto_alg_akcipher_init_session(stru= ct virtio_crypto_akcipher =20 ctrl =3D &vc_ctrl_req->ctrl; memcpy(&ctrl->header, header, sizeof(ctrl->header)); - memcpy(&ctrl->u, para, sizeof(ctrl->u)); + memcpy(&ctrl->u.akcipher_create_session.para, para, sizeof(*para)); input =3D &vc_ctrl_req->input; input->status =3D cpu_to_le32(VIRTIO_CRYPTO_ERR); =20 --=20 2.34.1