[PATCH] acpi: gtdt: fix buffer overrun comparison

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

The check to see if we overrun the data buffer is incorrect, the
comparison is currently the wrong way around. Thanks to Vikas C Sajjan
for finding and reporting this bug.

Reported-by: Vikas C Sajjan <vikas.cha.sajjan at hpe.com>
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/acpi/gtdt/gtdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/acpi/gtdt/gtdt.c b/src/acpi/gtdt/gtdt.c
index 421f17f..1c98185 100644
--- a/src/acpi/gtdt/gtdt.c
+++ b/src/acpi/gtdt/gtdt.c
@@ -75,7 +75,7 @@ static int gtdt_test1(fwts_framework *fw)
 		case 0x00:
 			/* GT Block Structure */
 			block = (fwts_acpi_table_gtdt_block *)ptr;
-			if (ptr + 20 < end_ptr) {
+			if (ptr + 20 > end_ptr) {
 				passed = false;
 				fwts_failed(fw, LOG_LEVEL_HIGH,
 					"GTDTShortBlock",
-- 
2.7.4