Change in coreboot[master]: src/acpi/acpigen: Add NULL pointer check

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/48148 )

Change subject: src/acpi/acpigen: Add NULL pointer check
......................................................................

src/acpi/acpigen: Add NULL pointer check

Add NULL pointer check in acpigen_emit_namestring
to avoid segmentation fault.

Change-Id: I3d01d28e74f202278b5a5a96d2edd45c66f10883
Signed-off-by: Ronak Kanabar 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48148
Reviewed-by: Subrata Banik 
Reviewed-by: Maulik V Vaghela 
Tested-by: build bot (Jenkins) 
---
M src/acpi/acpigen.c
1 file changed, 4 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved
  Maulik V Vaghela: Looks good to me, approved

diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c
index 244ac54..9a5543d 100644
--- a/src/acpi/acpigen.c
+++ b/src/acpi/acpigen.c
@@ -291,6 +291,10 @@
    int dotcount = 0, i;
    int dotpos = 0;

+	/* Check for NULL pointer */
+	if (!namepath)
+		return;
+
    /* We can start with a ''. */
    if (namepath[0] == '\') {
    	acpigen_emit_byte('\');