[PATCH] acpi: gtdt: fix buffer overrun comparison (for SBSA)

[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 Sunil V L
for finding and reporting this bug.

Reported-by: Sunil V L <sunil.vl 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 1c98185..b5ee280 100644
--- a/src/acpi/gtdt/gtdt.c
+++ b/src/acpi/gtdt/gtdt.c
@@ -181,7 +181,7 @@ static int gtdt_test1(fwts_framework *fw)
 		case 0x01:
 			/* SBSA Generic Watchdog Timer Structure */
 			watchdog = (fwts_acpi_table_gtdt_watchdog *)ptr;
-			if (ptr + 28 < end_ptr) {
+			if (ptr + 28 > end_ptr) {
 				passed = false;
 				fwts_failed(fw, LOG_LEVEL_HIGH,
 					"GTDTShortWatchDogTimer",
-- 
2.7.4