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Wed, 19 Aug 2020 12:10:08 +0200 (CEST) Received: from kaod.org (37.59.142.101) by DAG4EX1.mxp5.local (172.16.2.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Wed, 19 Aug 2020 12:10:07 +0200 Authentication-Results: garm.ovh; auth=pass (GARM-101G004db25bba5-f84c-4ef8-9e7e-893cc3fe1695, 56ABA3BD09B5898CED80C8E013D4E39E9C6048D1) smtp.auth=clg@kaod.org From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: Peter Maydell Subject: [PATCH v2 13/21] ftgmac100: Check for invalid len and address before doing a DMA transfer Date: Wed, 19 Aug 2020 12:09:48 +0200 Message-ID: <20200819100956.2216690-14-clg@kaod.org> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20200819100956.2216690-1-clg@kaod.org> References: <20200819100956.2216690-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Originating-IP: [37.59.142.101] X-ClientProxiedBy: DAG1EX1.mxp5.local (172.16.2.1) To DAG4EX1.mxp5.local (172.16.2.31) X-Ovh-Tracer-GUID: 665f476e-9059-4934-9b81-37117833da58 X-Ovh-Tracer-Id: 18050427309869927273 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduiedruddtkedgvdduucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvufffkffojghfgggtgfhisehtkeertdertdejnecuhfhrohhmpeevrogurhhitgcunfgvucfiohgrthgvrhcuoegtlhhgsehkrghougdrohhrgheqnecuggftrfgrthhtvghrnhepheehfeegjeeitdfffeetjeduveejueefuefgtdefueelueetveeliefhhffgtdelnecukfhppedtrddtrddtrddtpdefjedrheelrddugedvrddutddunecuvehluhhsthgvrhfuihiivgepgeenucfrrghrrghmpehmohguvgepshhmthhpqdhouhhtpdhhvghlohepmhigphhlrghnhedrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpegtlhhgsehkrghougdrohhrghdprhgtphhtthhopegtlhhgsehkrghougdrohhrgh Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=178.32.125.2; envelope-from=clg@kaod.org; helo=smtpout1.mo529.mail-out.ovh.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/19 06:10:05 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Frederic Konrad , Andrew Jeffery , qemu-devel@nongnu.org, qemu-arm@nongnu.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Joel Stanley Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" According to the Aspeed specs, no interrupts are raised in that case but a "Tx-packets lost" status seems like a good modeling choice for all implementations. It is covered by the Linux kernel. Cc: Frederic Konrad Reviewed-by: Joel Stanley Signed-off-by: C=C3=A9dric Le Goater --- hw/net/ftgmac100.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c index 014980d30aca..280aa3d3a1e2 100644 --- a/hw/net/ftgmac100.c +++ b/hw/net/ftgmac100.c @@ -507,6 +507,15 @@ static void ftgmac100_do_tx(FTGMAC100State *s, uint32_= t tx_ring, } =20 len =3D FTGMAC100_TXDES0_TXBUF_SIZE(bd.des0); + if (!len) { + /* + * 0 is an invalid size, however the HW does not raise any + * interrupt. Flag an error because the guest is buggy. + */ + qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid segment size\n", + __func__); + } + if (frame_size + len > sizeof(s->frame)) { qemu_log_mask(LOG_GUEST_ERROR, "%s: frame too big : %d bytes\n= ", __func__, len); --=20 2.25.4