[Spice-devel] [PATCH spice-gtk 2/2] usbutil: fix crash on windows
Marc-André Lureau
marcandre.lureau at gmail.com
Wed Jul 11 05:45:27 PDT 2012
vendor_count is the last access index, the actually count is +1.
On Windows, it crashes later on because of corrupted memory.
Thanks to valgrind for this precious help:
==4535== Invalid write of size 2
==4535== at 0x40197E: spice_usbutil_parse_usbids (usbutil.c:170)
==4535== by 0x401CEC: spice_usbutil_load_usbids (usbutil.c:241)
==4535== by 0x4020C6: main (usbutil.c:322)
==4535== Address 0x56b740c is 12 bytes after a block of size 348,160 alloc'd
==4535== at 0x4A0884D: malloc (vg_replace_malloc.c:263)
==4535== by 0x4EAAEBE: g_malloc (gmem.c:159)
==4535== by 0x401847: spice_usbutil_parse_usbids (usbutil.c:156)
==4535== by 0x401CEC: spice_usbutil_load_usbids (usbutil.c:241)
==4535== by 0x4020C6: main (usbutil.c:322)
==4535==
---
gtk/usbutil.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/gtk/usbutil.c b/gtk/usbutil.c
index 3bd7660..0649794 100644
--- a/gtk/usbutil.c
+++ b/gtk/usbutil.c
@@ -19,7 +19,9 @@
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
#include <glib-object.h>
#include <glib/gi18n.h>
@@ -149,7 +151,7 @@ static gboolean spice_usbutil_parse_usbids(gchar *path)
usbids_vendor_count++;
}
- usbids_vendor_info = g_new(usb_vendor_info, usbids_vendor_count);
+ usbids_vendor_info = g_new(usb_vendor_info, usbids_vendor_count + 1);
product_info = g_new(usb_product_info, product_count);
usbids_vendor_count = 0;
@@ -162,6 +164,7 @@ static gboolean spice_usbutil_parse_usbids(gchar *path)
id = strtoul(line, &line, 16);
while (isspace(line[0]))
line++;
+
usbids_vendor_info[usbids_vendor_count].vendor_id = id;
snprintf(usbids_vendor_info[usbids_vendor_count].name,
VENDOR_NAME_LEN, "%s", line);
@@ -309,3 +312,13 @@ void spice_usb_util_get_device_strings(int bus, int address,
}
#endif
+
+#ifdef USBUTIL_TEST
+int main()
+{
+ if (spice_usbutil_load_usbids())
+ exit(0);
+
+ exit(1);
+}
+#endif
--
1.7.10.4
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