opencl: handle OOB write in noshuffle GEMV kernels (odd ne01) (#25640)

ggml/src/ggml-opencl/kernels/gemv_noshuffle_q4_0_f32.cl

@@ -268,7 +268,12 @@ __kernel void kernel_gemv_noshuffle_q4_0_f32(
     // 2 outputs per fiber in wave 0
     if (groupId == 0) {
         dst = (global float*)((global char*)dst + offsetd);
-        vstore2(totalSum, 0, &(dst[gid * 2]));
+        // Guard the two output rows. The x-grid is padded to CEIL_DIV(ne01/2,64)*64,
+        // so when ne01 is not a multiple of 128 the tail row-pairs run past row ne01
+        // and would overrun dst into the adjacent tensor. No-op / byte-identical when
+        // ne01 % 128 == 0 (M/2 already a multiple of 64 -> no padding).
+        if (gid * 2 + 0 < M) dst[gid * 2 + 0] = totalSum.s0;
+        if (gid * 2 + 1 < M) dst[gid * 2 + 1] = totalSum.s1;
     }
 
 }