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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CO1PR11MB5089.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 12429f4e-8916-4f72-4336-08dc17a6db9e X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Jan 2024 21:54:19.5777 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: LHPUmDLDZ8dXthhcPauhfH/tY3dvZR2eUf/Ymt5VxjpuDfkp2lz72QumRqts4V6dgdw6vIqeuTi82I8A8IqbXbjeJL1OarxlLdGmFqPbvZk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR11MB6935 X-OriginatorOrg: intel.com > -----Original Message----- > From: Dan Carpenter > Sent: Monday, January 15, 2024 11:03 PM > To: Keller, Jacob E > Cc: Julia Lawall ; Kees Cook ; > Gustavo A . R . Silva ; cocci@systeme.lip6.fr; lin= ux- > kernel@vger.kernel.org; Harshit Mogalapalli > Subject: Re: [PATCH] coccinelle: semantic patch to check for potential st= ruct_size > calls >=20 > What happened to this patch? These sorts of patches go through Kees? >=20 No one replied and I got side tracked by other projects. > Also it would be nice if it could handle char arrays. It doesn't warn > for the kmalloc in dg_dispatch_as_host(): >=20 Yea it would be nice to handle this too. > drivers/misc/vmw_vmci/vmci_datagram.c > 227 dg_info =3D kmalloc(sizeof(*dg_info) + > 228 (size_t) dg->payload_size, GF= P_ATOMIC); >=20 > The Cocci check is looking specifically for: >=20 > sizeof(*dg_info) + (sizeof(*dg_info->msg_payload) * dg->payload_size) >=20 I think that's a slightly different formulation. > But since this flex array is u8 there is no multiply. I don't know how > are it is to add support for char arrays... >=20 A separate rule would work. > Also another common way to write the multiply is: >=20 > sizeof(*dg_info) + (sizeof(dg_info->msg_payload[0]) * dg->payload_size) >=20 > That should be pretty straight forward to add. >=20 > regards, > dan carpenter >=20 Mostly I just lost track of this because I struggled to get traction in the= right lists and trees. Thanks, Jake