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Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Kees Cook , "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Jason Gunthorpe , Leon Romanovsky , Shradha Gupta , Konstantin Taranov Cc: Erick Archer , linux-rdma@vger.kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH v3 0/3] RDMA/mana_ib: Add flex array to struct mana_cfg_rx_steer_req_v2 Date: Sat, 6 Apr 2024 16:23:34 +0200 Message-ID: X-Mailer: git-send-email 2.25.1 X-TMN: [K7DW6bStmsUjCdMj41mLOHOK5maQoDjt] X-ClientProxiedBy: MA4P292CA0010.ESPP292.PROD.OUTLOOK.COM (2603:10a6:250:2d::13) To AS8PR02MB7237.eurprd02.prod.outlook.com (2603:10a6:20b:3f1::10) X-Microsoft-Original-Message-ID: <20240406142337.16241-1-erick.archer@outlook.com> Precedence: bulk X-Mailing-List: netdev@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_|AS8PR02MB6967:EE_ X-MS-Office365-Filtering-Correlation-Id: a57313b9-651b-42e7-2775-08dc56453095 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: a57313b9-651b-42e7-2775-08dc56453095 X-MS-Exchange-CrossTenant-AuthSource: AS8PR02MB7237.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Apr 2024 14:23:57.7266 (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: AS8PR02MB6967 The "struct mana_cfg_rx_steer_req_v2" uses a dynamically sized set of trailing elements. Specifically, it uses a "mana_handle_t" array. So, use the preferred way in the kernel declaring a flexible array [1]. At the same time, prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). Also, avoid the open-coded arithmetic in the memory allocator functions [2] using the "struct_size" macro. Moreover, use the "offsetof" helper to get the indirect table offset instead of the "sizeof" operator and avoid the open-coded arithmetic in pointers using the new flex member. This new structure member also allow us to remove the "req_indir_tab" variable since it is no longer needed. Now, it is also possible to use the "flex_array_size" helper to compute the size of these trailing elements in the "memcpy" function. Specifically, the first commit adds the flex member and the patches 2 and 3 refactor the consumers of the "struct mana_cfg_rx_steer_req_v2". This code was detected with the help of Coccinelle, and audited and modified manually. The Coccinelle script used to detect this code pattern is the following: virtual report @rule1@ type t1; type t2; identifier i0; identifier i1; identifier i2; identifier ALLOC =~ "kmalloc|kzalloc|kmalloc_node|kzalloc_node|vmalloc|vzalloc|kvmalloc|kvzalloc"; position p1; @@ i0 = sizeof(t1) + sizeof(t2) * i1; ... i2 = ALLOC@p1(..., i0, ...); @script:python depends on report@ p1 << rule1.p1; @@ msg = "WARNING: verify allocation on line %s" % (p1[0].line) coccilib.report.print_report(p1[0],msg) Link: https://www.kernel.org/doc/html/next/process/deprecated.html#zero-length-and-one-element-arrays [1] Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [2] Signed-off-by: Erick Archer --- Changes in v3: - Split the changes in various commits to simplify the acceptance process (Leon Romanovsky). Changes in v2: - Remove the "req_indir_tab" variable (Gustavo A. R. Silva). - Update the commit message. - Add the "__counted_by" attribute. Previous versions: v1 -> https://lore.kernel.org/linux-hardening/AS8PR02MB7237974EF1B9BAFA618166C38B382@AS8PR02MB7237.eurprd02.prod.outlook.com/ v2 -> https://lore.kernel.org/linux-hardening/AS8PR02MB723729C5A63F24C312FC9CD18B3F2@AS8PR02MB7237.eurprd02.prod.outlook.com/ --- Erick Archer (3): net: mana: Add flex array to struct mana_cfg_rx_steer_req_v2 RDMA/mana_ib: Prefer struct_size over open coded arithmetic net: mana: Avoid open coded arithmetic drivers/infiniband/hw/mana/qp.c | 12 +++++------- drivers/net/ethernet/microsoft/mana/mana_en.c | 14 ++++++-------- include/net/mana/mana.h | 1 + 3 files changed, 12 insertions(+), 15 deletions(-)