On Thu, 14 Mar 2024 at 20:35, Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
>
> On Thu, 14 Mar 2024 at 19:32, Radek Podgorny <radek@xxxxxxxxxxx> wrote:
> >
> > hi,
> >
> > i seem to be the only one in the world to have this problem. :-(
> >
> > on one of my machines, updating to 6.6.18 and later (including mainline
> > branch) leads to unbootable system. all other computers are unaffected.
> >
> > bisecting the history leads to:
> >
> > commit 8117961d98fb2d335ab6de2cad7afb8b6171f5fe
> > Author: Ard Biesheuvel <ardb@xxxxxxxxxx>
> >
>
> Thanks for the report.
>
> I'd like to get to the bottom of this if we can.
>
> Please share as much information as you can about the system
> - boot logs
> - DMI data to identify the system and firmware etc
> - distro version
> - versions of boot components (shim, grub, systemd-boot, etc including
> config files)
> - other information that might help narrow this down.
Also, please check whether the below change makes a difference or not
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -477,6 +477,8 @@
efi_exit(handle, status);
}
+ memset(&boot_params, 0, sizeof(boot_params));
+
/* Assign the setup_header fields that the kernel actually
cares about */
hdr->root_flags = 1;
hdr->vid_mode = 0xffff;
