---

yaml --- r: 371190 b: refs/heads/master c: 3058753 h: refs/heads/master v: v3
git-mirror · Mar 13, 2013 · 416a3b0 · 416a3b0
1 parent 2b37458
commit 416a3b0
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 647416f9eefe7699754b01b9fc82758fde83248c
+refs/heads/master: 3058753583c6a641bac188011b4d777adec916c9
diff --git a/trunk/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/trunk/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -747,7 +747,11 @@ validate_exec_list(struct drm_i915_gem_exec_object2 *exec,
 
 		length = exec[i].relocation_count *
 			sizeof(struct drm_i915_gem_relocation_entry);
-		/* we may also need to update the presumed offsets */
+		/*
+		 * We must check that the entire relocation array is safe
+		 * to read, but since we may need to update the presumed
+		 * offsets during execution, check for full write access.
+		 */
 		if (!access_ok(VERIFY_WRITE, ptr, length))
 			return -EFAULT;