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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