drm/i915: Use range_overflows()
Replace a few more open-coded overflow checks with the macro.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170106152013.24684-4-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index f6d3755..e144f03 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1416,13 +1416,16 @@ bool intel_bios_is_valid_vbt(const void *buf, size_t size)
return false;
}
- if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
+ if (range_overflows_t(size_t,
+ vbt->bdb_offset,
+ sizeof(struct bdb_header),
+ size)) {
DRM_DEBUG_DRIVER("BDB header incomplete\n");
return false;
}
bdb = get_bdb_header(vbt);
- if (vbt->bdb_offset + bdb->bdb_size > size) {
+ if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
DRM_DEBUG_DRIVER("BDB incomplete\n");
return false;
}