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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Kees Cook , "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , "Jiri Slaby (SUSE)" , Greg Kroah-Hartman , Geert Uytterhoeven Cc: Erick Archer , linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH v3 2/2] tty: rfcomm: prefer array indexing over pointer arithmetic Date: Fri, 17 May 2024 19:21:50 +0200 Message-ID: X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240517172150.5476-1-erick.archer@outlook.com> References: <20240517172150.5476-1-erick.archer@outlook.com> X-TMN: [AyUf7TvpU/T8yh7Z6kMAXUGQltDUUjYT] X-ClientProxiedBy: MA2P292CA0028.ESPP292.PROD.OUTLOOK.COM (2603:10a6:250::15) To AS8PR02MB7237.eurprd02.prod.outlook.com (2603:10a6:20b:3f1::10) X-Microsoft-Original-Message-ID: <20240517172150.5476-3-erick.archer@outlook.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR02MB7237:EE_|AM7PR02MB6195:EE_ X-MS-Office365-Filtering-Correlation-Id: 8631edf8-2f37-448b-dc92-08dc7695e758 X-Microsoft-Antispam: BCL:0;ARA:14566002|461199019|3412199016|440099019|1710799017; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: pWiWxQu8l72kPvWqiweokE6HDiFf/PKZG0O3O3XKKoAyCPOKUMSUOCGZRidQ2PT5GpRZZ+CMtCtCAkzzZC3+olRIZAa0nQx82Y2AoWPZavpxHpMfmperS8wO3SC5pg0r6DKqtGYk8n5fZUFQACZA+CeChBMjlOCXrpKrwXWuK01mIERnpYH24WBQRt63MPboGZJCJe6CFprOZUFor021bNAOoBWHuc2zysB5eyFbxdEPuGMRJUOId5fBCUX2yUMPzieFMacT+HEa8mXqNf9hepmhT3oms2sSrDxo8QHNBneZCLA6SOh/6rPr9G4PCUL0mjKXaOKtVvxGr1uWYf4FNDCr+ibn4hwYONtlwRJIaYvaWpBmH050oei6lI6DVVEs47/5X0EfVRmK4P1bFmlRbCYhojTZ5mdlj/z9tiOSpp/3WrNm/fPzhmGME9kFVZnsSY2vJRceUCWoTOv5Pias16P0VH+R73gs4uYrBEGv33ZB8c4O5S8XoO9pfdCC6eohLbFBUo+jjm0o2qIt1axEXDKt0Rv2nKhxwVTmOMbZ0lMqJNXpf+pqXpswHM5P+B+vQO0/htD5tiXsJgB023ZIPDVwP5KsF9XssPiXh6R45HCTEagbX41UVXS7ExoYQF76EoKOUYJcylBOq6p33KI6lRxLKKqNRLBq1yn9IW0L1y9Mkr4uvG7N3JgCyoJI2rwZ27rQBcYIEX9zlDWTuiMqICkX2vFdviabO5XEvNqxecW1VlrPGDAcFkXoMsJG84Oez3HsvT6ixzfofRgeZd99sjvhtZVSb9T79vOq9oIa6W6ZaK9UtSVzGUmhtiaZZV5icI8fh35XRk8t4u/zvfQKYESOBIYEv5U6Bv1wUwK+CJN2cF5v1AD3iohRTWIj8r3W/nUijXwY7tWyVOm0r8EpdPtM5N2+33oOpJVw4QpLHnoHFiyDVtodnJAM+gopXYEfJ8KCHoopdGq4AeRR/XOY2GXKoqaulx9JMauEVUnF/qll+greugsXZto+yzFSZasMAzXqlexRfBk80Mqe0uY6pWhys0hLQQHLONL939GVBbh3PbDVWBLTUwwGezA/S52uKV1/BD0gMfkZKt44+GKP4wlwf6yrOOcDDV1AFKII1JFm138fGIAJ5DVpOzw8cN6oBC+2Dj6AJEnyaa6pU2q/s8sObq+b5iP3JCIvOkkdyEfWFVhg+SDbQOWWRwp8HFigAdTg93ClQJf8qm+UfzX1RvsIaBShOEIWAIeOIWHRXrec1apGONEDAH038SJPjoO8 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8631edf8-2f37-448b-dc92-08dc7695e758 X-MS-Exchange-CrossTenant-AuthSource: AS8PR02MB7237.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 May 2024 17:22:18.5226 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR02MB6195 Refactor the list_for_each_entry() loop of rfcomm_get_dev_list() function to use array indexing instead of pointer arithmetic. This way, the code is more readable and idiomatic. Reviewed-by: Kees Cook Signed-off-by: Erick Archer --- net/bluetooth/rfcomm/tty.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 44b781e7569e..af80d599c337 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -527,12 +527,12 @@ static int rfcomm_get_dev_list(void __user *arg) list_for_each_entry(dev, &rfcomm_dev_list, list) { if (!tty_port_get(&dev->port)) continue; - (di + n)->id = dev->id; - (di + n)->flags = dev->flags; - (di + n)->state = dev->dlc->state; - (di + n)->channel = dev->channel; - bacpy(&(di + n)->src, &dev->src); - bacpy(&(di + n)->dst, &dev->dst); + di[n].id = dev->id; + di[n].flags = dev->flags; + di[n].state = dev->dlc->state; + di[n].channel = dev->channel; + bacpy(&di[n].src, &dev->src); + bacpy(&di[n].dst, &dev->dst); tty_port_put(&dev->port); if (++n >= dev_num) break;