Please ignore this patch, a better approach is
https://lists.gnu.org/archive/html/grub-devel/2025-01/msg00093.html
On Thu, Jan 9, 2025 at 10:37 AM Leo Sandoval <lsand...@redhat.com> wrote:
> Serial SPCR MMIO null address are invalid, so return from function,
> otherwise
> invalid 'mmio,0' port names are generated halting the system when running
> terminal_input|output commands.
>
> Signed-off-by: Leo Sandoval <lsand...@redhat.com>
> ---
> grub-core/term/ns8250.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/grub-core/term/ns8250.c b/grub-core/term/ns8250.c
> index 23e8e0904..4ac0bc06a 100644
> --- a/grub-core/term/ns8250.c
> +++ b/grub-core/term/ns8250.c
> @@ -407,6 +407,9 @@ grub_serial_ns8250_add_mmio (grub_addr_t addr,
> unsigned int acc_size,
> struct grub_serial_port *p;
> unsigned i;
>
> + if (addr == NULL)
> + return NULL;
> +
> for (i = 0; i < GRUB_SERIAL_PORT_NUM; i++)
> if (com_ports[i].use_mmio == true && com_ports[i].mmio.base == addr)
> {
> --
> 2.47.0
>
>
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>
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