commit 0572f01117c897bef5ece0b367bc6700d4fbd161
author Philippe Mathieu-Daudé <philmd@redhat.com> Fri Sep 03 12:01:20 2021 +0200
committer Philippe Mathieu-Daudé <philmd@linaro.org> Wed May 08 19:42:45 2024 +0200
tree 029efa62b90af03ef8af23f978a5413dbcc78537
parent 40fed8c1d3a2bcef81c8de3f55d7e1abe1397347

hw/hppa/machine: Replace g_memdup() by g_memdup2()

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.

Trivially safe because the argument was directly from sizeof.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210903174510.751630-12-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/hppa/machine.c

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 37ee638..5d0a873 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -207,37 +207,37 @@
 
     val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION);
     fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     val = cpu_to_le64(HPPA_TLB_ENTRIES - btlb_entries);
     fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     val = cpu_to_le64(btlb_entries);
     fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     len = strlen(mc->name) + 1;
     fw_cfg_add_file(fw_cfg, "/etc/hppa/machine",
-                    g_memdup(mc->name, len), len);
+                    g_memdup2(mc->name, len), len);
 
     val = cpu_to_le64(soft_power_reg);
     fw_cfg_add_file(fw_cfg, "/etc/hppa/power-button-addr",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     val = cpu_to_le64(CPU_HPA + 16);
     fw_cfg_add_file(fw_cfg, "/etc/hppa/rtc-addr",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     val = cpu_to_le64(CPU_HPA + 24);
     fw_cfg_add_file(fw_cfg, "/etc/hppa/DebugOutputPort",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
+                    g_memdup2(&val, sizeof(val)), sizeof(val));
 
     fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_config.order[0]);
     qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
 
     fw_cfg_add_file(fw_cfg, "/etc/qemu-version",
-                    g_memdup(qemu_version, sizeof(qemu_version)),
+                    g_memdup2(qemu_version, sizeof(qemu_version)),
                     sizeof(qemu_version));
 
     fw_cfg_add_extra_pci_roots(pci_bus, fw_cfg);