fix memory corruption bug in gguf

ctx->kv and ctx->infos was reallocated using not-aligned realloc, but freed with aligned free.
to fix this a GGML_ALIGNED_REALLOC was added, but there is no posix_memalign_realloc function.
so on non-windows and non-mingw32 platforms we fall back to aligned malloc, followed by copying
and freeing the old data.

ggml.c

@@ -195,6 +195,7 @@ typedef void * thread_ret_t;
 
 #if defined(_MSC_VER) || defined(__MINGW32__)
 #define GGML_ALIGNED_MALLOC(size) _aligned_malloc(size, GGML_MEM_ALIGN)
+#define GGML_ALIGNED_REALLOC(ptr, old_size, size) _aligned_realloc(ptr, size, GGML_MEM_ALIGN)
 #define GGML_ALIGNED_FREE(ptr)    _aligned_free(ptr)
 #else
 inline static void * ggml_aligned_malloc(size_t size) {
@@ -220,7 +221,15 @@ inline static void * ggml_aligned_malloc(size_t size) {
     }
     return aligned_memory;
 }
+inline static void * ggml_aligned_realloc(void * ptr, size_t old_size, size_t size) {
+    // There is no posix_memalign_realloc function
+    void * result = ggml_aligned_malloc(size);
+    memcpy(result, ptr, old_size);
+    free(ptr);
+    return result;
+}
 #define GGML_ALIGNED_MALLOC(size) ggml_aligned_malloc(size)
+#define GGML_ALIGNED_REALLOC(ptr, old_size, size) ggml_aligned_realloc(size)
 #define GGML_ALIGNED_FREE(ptr)    free(ptr)
 #endif
 
@@ -20073,7 +20082,7 @@ static int gguf_get_or_add_key(struct gguf_context * ctx, const char * key) {
 
     const int n_kv = gguf_get_n_kv(ctx);
 
-    ctx->kv = realloc(ctx->kv, (n_kv + 1) * sizeof(struct gguf_kv));
+    ctx->kv = GGML_ALIGNED_REALLOC(ctx->kv, n_kv * sizeof(struct gguf_kv), (n_kv + 1) * sizeof(struct gguf_kv));
     ctx->kv[n_kv].key.n    = strlen(key);
     ctx->kv[n_kv].key.data = strdup(key);
     ctx->header.n_kv++;
@@ -20230,7 +20239,7 @@ void gguf_add_tensor(
              struct gguf_context * ctx,
         const struct ggml_tensor * tensor) {
     const int idx = ctx->header.n_tensors;
-    ctx->infos = realloc(ctx->infos, (idx + 1)*sizeof(struct gguf_tensor_info));
+    ctx->infos = GGML_ALIGNED_REALLOC(ctx->infos, idx*sizeof(struct gguf_tensor_info), (idx + 1)*sizeof(struct gguf_tensor_info));
 
     ctx->infos[idx].name.n    = strlen(tensor->name);
     ctx->infos[idx].name.data = strdup(tensor->name);