From ad4f0f1941677c6cd78bcd14348cd99ae7dd7527 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Tue, 19 Jan 2016 14:37:50 +0100
Subject: [PATCH] renderer: reject large LOD values
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Or we could sit for a very long time in some further loops.

Fix found thanks to american fuzzy lop.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 src/vrend_renderer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vrend_renderer.c b/src/vrend_renderer.c
index 5374f09..ab60729 100644
--- a/src/vrend_renderer.c
+++ b/src/vrend_renderer.c
@@ -3935,6 +3935,8 @@ static int check_resource_valid(struct vrend_renderer_resource_create_args *args
       /* buffer and rect textures can't have mipmaps */
       if (args->target == PIPE_BUFFER || args->target == PIPE_TEXTURE_RECT)
          return -1;
+      if (args->last_level > (floor(log2(MAX2(args->width, args->width))) + 1))
+         return -1;
    }
    if (args->flags != 0 && args->flags != VIRGL_RESOURCE_Y_0_TOP)
       return -1;