Messages in this thread | | | Date | Tue, 14 Nov 2017 00:55:46 +0100 | From | "Luis R. Rodriguez" <> | Subject | Re: [RFC PATCH v2] fw_lockdown: new micro LSM module to prevent loading unsigned firmware |
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On Mon, Nov 13, 2017 at 08:51:54PM +0100, Luis R. Rodriguez wrote: > On Mon, Nov 13, 2017 at 02:36:47PM -0500, Mimi Zohar wrote: > > On Mon, 2017-11-13 at 20:05 +0100, Luis R. Rodriguez wrote: > > > > + * fw_lockdown_read_file - prevent loading of unsigned firmware > > > > + * @file: pointer to firmware > > > > + * @read_id: caller identifier > > > > + * > > > > + * Prevent loading of unsigned firmware in lockdown mode. > > > > + */ > > > > +static int fw_lockdown_read_file(struct file *file, enum kernel_read_file_id id) > > > > +{ > > > > + if (id == READING_FIRMWARE) { > > > > + if (!is_ima_appraise_enabled() && > > > > + kernel_is_locked_down("Loading of unsigned firmware")) > > > > + return -EACCES; > > > > + }
We also have READING_FIRMWARE_PREALLOC_BUFFER now. So the above is missing a check for that as well.
Luis
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