[Intel-gfx] [PATCH] drm/i915: prevent integer overflow in query_engine_info()

[Dan Carpenter]

This code uses struct_size() but it stores the result in an int so the
integer overflow checks are not effective.  Record the types as size_t
to prevent the size from being truncated.

Fixes: bf3c50837506 ("drm/i915/query: Use struct_size() helper")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
I do not know if the integer overflow can happen.  This is a hardenning
patch just like the conversion to struct_size().

 drivers/gpu/drm/i915/i915_query.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index 6ec9c9fb7b0d..43a499fbdc8d 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -13,7 +13,7 @@
 #include <uapi/drm/i915_drm.h>
 
 static int copy_query_item(void *query_hdr, size_t query_sz,
-			   u32 total_length,
+			   size_t total_length,
 			   struct drm_i915_query_item *query_item)
 {
 	if (query_item->length == 0)
@@ -135,7 +135,8 @@ query_engine_info(struct drm_i915_private *i915,
 	struct drm_i915_engine_info info = { };
 	unsigned int num_uabi_engines = 0;
 	struct intel_engine_cs *engine;
-	int len, ret;
+	size_t len;
+	int ret;
 
 	if (query_item->flags)
 		return -EINVAL;
-- 
2.35.1