diff mbox series

[24/28] tests/qtest: Replace g_memdup() by g_memdup2_qemu()

Message ID 20210903110702.588291-25-philmd@redhat.com
State New
Headers show
Series glib: Replace g_memdup() by g_memdup2_qemu() | expand

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 <philmd@redhat.com>
---
 tests/qtest/libqos/ahci.c   | 6 +++---
 tests/qtest/libqos/qgraph.c | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/tests/qtest/libqos/ahci.c b/tests/qtest/libqos/ahci.c
index fba3e7a954e..8ef1bda7c1c 100644
--- a/tests/qtest/libqos/ahci.c
+++ b/tests/qtest/libqos/ahci.c
@@ -639,8 +639,8 @@  void ahci_exec(AHCIQState *ahci, uint8_t port,
     AHCIOpts *opts;
     uint64_t buffer_in;
 
-    opts = g_memdup((opts_in == NULL ? &default_opts : opts_in),
-                    sizeof(AHCIOpts));
+    opts = g_memdup2_qemu((opts_in == NULL ? &default_opts : opts_in),
+                          sizeof(AHCIOpts));
 
     buffer_in = opts->buffer;
 
@@ -860,7 +860,7 @@  AHCICommand *ahci_command_create(uint8_t command_name)
     g_assert(!props->ncq || props->lba48);
 
     /* Defaults and book-keeping */
-    cmd->props = g_memdup(props, sizeof(AHCICommandProp));
+    cmd->props = g_memdup2_qemu(props, sizeof(AHCICommandProp));
     cmd->name = command_name;
     cmd->xbytes = props->size;
     cmd->prd_size = 4096;
diff --git a/tests/qtest/libqos/qgraph.c b/tests/qtest/libqos/qgraph.c
index d1dc4919305..c2e7719bed9 100644
--- a/tests/qtest/libqos/qgraph.c
+++ b/tests/qtest/libqos/qgraph.c
@@ -93,7 +93,7 @@  static void add_edge(const char *source, const char *dest,
     edge->type = type;
     edge->dest = g_strdup(dest);
     edge->edge_name = g_strdup(opts->edge_name ?: dest);
-    edge->arg = g_memdup(opts->arg, opts->size_arg);
+    edge->arg = g_memdup2_qemu(opts->arg, opts->size_arg);
 
     edge->before_cmd_line =
         opts->before_cmd_line ? g_strconcat(" ", opts->before_cmd_line, NULL) : NULL;