[v3,13/28] hw/net/eepro100: Replace g_memdup() by g_memdup2()

Commit Message

Philippe Mathieu-Daudé Sept. 3, 2021, 5:44 p.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() wrapper.

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 hw/net/eepro100.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/hw/net/eepro100.c b/hw/net/eepro100.c
index 16e95ef9cc9..a4e67f69752 100644
--- a/hw/net/eepro100.c
+++ b/hw/net/eepro100.c
@@ -1872,7 +1872,7 @@  static void e100_nic_realize(PCIDevice *pci_dev, Error **errp)
 
     qemu_register_reset(nic_reset, s);
 
-    s->vmstate = g_memdup(&vmstate_eepro100, sizeof(vmstate_eepro100));
+    s->vmstate = g_memdup2(&vmstate_eepro100, sizeof(vmstate_eepro100));
     s->vmstate->name = qemu_get_queue(s->nic)->model;
     vmstate_register(VMSTATE_IF(&pci_dev->qdev), VMSTATE_INSTANCE_ID_ANY,
                      s->vmstate, s);