Messages in this thread | | | Subject | Re: [PATCH 1/7] fs: introduce kernel_pread_file* support | From | Scott Branden <> | Date | Fri, 23 Aug 2019 12:55:30 -0700 |
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Hi Takashi
On 2019-08-23 5:29 a.m., Takashi Iwai wrote: > On Thu, 22 Aug 2019 21:24:45 +0200, > Scott Branden wrote: >> Add kernel_pread_file* support to kernel to allow for partial read >> of files with an offset into the file. Existing kernel_read_file >> functions call new kernel_pread_file functions with offset=0 and >> flags=KERNEL_PREAD_FLAG_WHOLE. > Would this change passes the security check like ima? > I thought security_kernel_post_read_file() checks the whole content > for calculating the hash...
It passes the fw_run_tests.sh. How do you test the firmware loader passes this security check?
What exactly does this ima do? How do you enable/disable using it?
Any reasonable device would check the integrity of the firmware image being loaded to it.
And, if part of a security model, authenticate the image.
Whatever security check you are referring to is not needed by request_firmware_into_buf when loading
a partial file into a buffer.
> > > thanks, > > Takashi
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