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Wed, 6 Dec 2023 03:04:29 +0000 From: Joyce Kong To: Stephen Hemminger CC: Jakub Grajciar , =?iso-8859-1?Q?Morten_Br=F8rup?= , Ruifeng Wang , "dev@dpdk.org" , nd , "stable@dpdk.org" , Liangxing Wang Subject: RE: [PATCH v1] net/memif: fix segfault with Tx burst larger than 255 Thread-Topic: [PATCH v1] net/memif: fix segfault with Tx burst larger than 255 Thread-Index: AQHaJzBRp5xJZrMEi0CS5fU1RkAdcLCbBMEAgACNuZA= Date: Wed, 6 Dec 2023 03:04:29 +0000 Message-ID: References: <20231205040524.3525473-1-joyce.kong@arm.com> <20231205103340.05563ee9@hermes.local> In-Reply-To: <20231205103340.05563ee9@hermes.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; x-ms-traffictypediagnostic: AS4PR08MB7712:EE_|DU0PR08MB7860:EE_|AMS0EPF000001A8:EE_|GV1PR08MB10642:EE_ X-MS-Office365-Filtering-Correlation-Id: 0f0583ca-ae1a-48ba-fd06-08dbf6081681 x-checkrecipientrouted: true nodisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; 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Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF000001A8.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR08MB10642 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org > -----Original Message----- > From: Stephen Hemminger > Sent: Wednesday, December 6, 2023 2:34 AM > To: Joyce Kong > Cc: Jakub Grajciar ; Morten Br=F8rup > ; Ruifeng Wang ; > dev@dpdk.org; nd ; stable@dpdk.org; Liangxing Wang > > Subject: Re: [PATCH v1] net/memif: fix segfault with Tx burst larger than= 255 >=20 > On Tue, 5 Dec 2023 04:05:24 +0000 > Joyce Kong wrote: >=20 > > There will be a segfault when tx burst size is larger than 256. This > > is because eth_memif_tx uses an index i which is uint8_t to count > > transmitted nb_pkts. Extend i to uint16_t, the same size as nb_pkts. > > > > Fixes: b5613c8f9d0a ("net/memif: add a Tx fast path") > > Cc: stable@dpdk.org > > > > Reported-by: Liangxing Wang > > Signed-off-by: Joyce Kong > > Reviewed-by: Ruifeng Wang > > --- >=20 > I wonder if other drivers have same bug? I don't think this is a common bug. This is a special case as the bug is introduced for whether choosing the me= mif Tx fast path.=20 >=20 > Reviewed-by: Stephen Hemminger