shithub: dav1d

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checkasm: Fix out-of-bounds read in warp8x8 tests

--- a/tests/checkasm/mc.c

+++ b/tests/checkasm/mc.c

@@ -433,8 +433,8 @@

                  HIGHBD_DECL_SUFFIX);

     if (check_func(c->warp8x8, "warp_8x8_%dbpc", BITDEPTH)) {

-        const int mx = (rnd() & 0x1fff) - 0x800;

-        const int my = (rnd() & 0x1fff) - 0x800;

+        const int mx = (rnd() & 0x1fff) - 0xa00;

+        const int my = (rnd() & 0x1fff) - 0xa00;

 #if BITDEPTH == 16

         const int bitdepth_max = rnd() & 1 ? 0x3ff : 0xfff;

 #else

@@ -442,7 +442,7 @@

 #endif

         for (int i = 0; i < 4; i++)

-            abcd[i] = (rnd() & 0x1fff) - 0x800;

+            abcd[i] = (rnd() & 0x1fff) - 0xa00;

         for (int i = 0; i < 15 * 15; i++)

             src_buf[i] = rnd() & bitdepth_max;

@@ -459,8 +459,8 @@

 static void check_warp8x8t(Dav1dMCDSPContext *const c) {

     ALIGN_STK_32(pixel, src_buf, 15 * 15,);

-    ALIGN_STK_32(int16_t, c_tmp,    8 *  8,);

-    ALIGN_STK_32(int16_t, a_tmp,    8 *  8,);

+    ALIGN_STK_32(int16_t, c_tmp,  8 *  8,);

+    ALIGN_STK_32(int16_t, a_tmp,  8 *  8,);

     int16_t abcd[4];

     const pixel *src = src_buf + 15 * 3 + 3;

     const ptrdiff_t src_stride = 15 * sizeof(pixel);

@@ -470,8 +470,8 @@

                  HIGHBD_DECL_SUFFIX);

     if (check_func(c->warp8x8t, "warp_8x8t_%dbpc", BITDEPTH)) {

-        const int mx = (rnd() & 0x1fff) - 0x800;

-        const int my = (rnd() & 0x1fff) - 0x800;

+        const int mx = (rnd() & 0x1fff) - 0xa00;

+        const int my = (rnd() & 0x1fff) - 0xa00;

 #if BITDEPTH == 16

         const int bitdepth_max = rnd() & 1 ? 0x3ff : 0xfff;

 #else

@@ -479,7 +479,7 @@

 #endif

         for (int i = 0; i < 4; i++)

-            abcd[i] = (rnd() & 0x1fff) - 0x800;

+            abcd[i] = (rnd() & 0x1fff) - 0xa00;

         for (int i = 0; i < 15 * 15; i++)

             src_buf[i] = rnd() & bitdepth_max;