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23 October 2021, 00:29:24 UTC
Revision 2e604c0f19dcdd433b3863ffc3da9bc0787ca765 authored by Josh Boyer on 07 March 2013, 04:23:30 UTC, committed by H. Peter Anvin on 07 March 2013, 04:23:30 UTC 
x86: Don't clear efi_info even if the sentinel hits
 
When boot_params->sentinel is set, all we really know is that some
undefined set of fields in struct boot_params contain garbage.  In the
particular case of efi_info, however, there is a private magic for
that substructure, so it is generally safe to leave it even if the
bootloader is broken.

kexec (for which we did the initial analysis) did not initialize this
field, but of course all the EFI bootloaders do, and most EFI
bootloaders are broken in this respect (and should be fixed.)

Reported-by: Robin Holt <holt@sgi.com>
Link: http://lkml.kernel.org/r/CA%2B5PVA51-FT14p4CRYKbicykugVb=PiaEycdQ57CK2km_OQuRQ@mail.gmail.com
Tested-by: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
1 parent 98e7a98
History
Tip revision: 2e604c0f19dcdd433b3863ffc3da9bc0787ca765 authored by Josh Boyer on 07 March 2013, 04:23:30 UTC
x86: Don't clear efi_info even if the sentinel hits
Tip revision: 2e604c0
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