From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Leo Sandoval Date: Wed, 8 Jan 2025 10:24:26 -0600 Subject: [PATCH] term/ns8250: return in case of a null SPCR base addresses 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. Resolves: #RHEL-68622 Signed-off-by: Leo Sandoval --- 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) {