[17/28] hw/rdma: Replace g_memdup() by g_memdup2_qemu()

Commit Message

Philippe Mathieu-Daudé Sept. 3, 2021, 11:06 a.m. UTC

Per https://discourse.gnome.org/t/port-your-module-from-g-memdup-to-g-memdup2-now/5538

  The old API took the size of the memory to duplicate as a guint,
  whereas most memory functions take memory sizes as a gsize. This
  made it easy to accidentally pass a gsize to g_memdup(). For large
  values, that would lead to a silent truncation of the size from 64
  to 32 bits, and result in a heap area being returned which is
  significantly smaller than what the caller expects. This can likely
  be exploited in various modules to cause a heap buffer overflow.

Replace g_memdup() by the safer g_memdup2_qemu() wrapper.

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 hw/rdma/rdma_utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/hw/rdma/rdma_utils.c b/hw/rdma/rdma_utils.c
index 98df58f6897..9792b1c8ef5 100644
--- a/hw/rdma/rdma_utils.c
+++ b/hw/rdma/rdma_utils.c
@@ -71,7 +71,7 @@  void rdma_protected_gqueue_append_int64(RdmaProtectedGQueue *list,
                                         int64_t value)
 {
     qemu_mutex_lock(&list->lock);
-    g_queue_push_tail(list->list, g_memdup(&value, sizeof(value)));
+    g_queue_push_tail(list->list, g_memdup2_qemu(&value, sizeof(value)));
     qemu_mutex_unlock(&list->lock);
 }