drm/amd/ras: add first record offset check

check the upper and lower limits of first record offset

Signed-off-by: Gangliang Xie <ganglxie@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/ras/rascore/ras_eeprom.c b/drivers/gpu/drm/amd/ras/rascore/ras_eeprom.c
index 65c1812a10fb14f9eedcd790017248db70d5ce81..34b798f45af21018cd6ec4a380e404dfdd3994ff 100644 (file)
--- a/drivers/gpu/drm/amd/ras/rascore/ras_eeprom.c
+++ b/drivers/gpu/drm/amd/ras/rascore/ras_eeprom.c
@@ -1163,6 +1163,13 @@ static int __check_ras_table_status(struct ras_core_context *ras_core)
        }
 
        control->ras_fri = RAS_OFFSET_TO_INDEX(control, hdr->first_rec_offset);
+       if (hdr->first_rec_offset < control->ras_record_offset ||
+           control->ras_fri >= control->ras_max_record_count) {
+               RAS_DEV_ERR(ras_core->dev,
+                       "RAS header invalid, ras_fri: %u, first_rec_offset:0x%x",
+                       control->ras_fri, hdr->first_rec_offset);
+               return -EINVAL;
+       }
 
        return 0;
 }