I am using network-manager 0.7.1, on Debian testing.

My syslog was littered with segfaults like this:

nm-system-setti[1052]: segfault at 4 ip b7ffa4f1 sp bfd1bd50 error 4 in libnm settings-plugin-ifupdown.so[b7ff6000+8000]
nm-system-setti[1516]: segfault at 4 ip b7f924f1 sp bfab3af0 error 4 in libnm-settings-plugin-ifupdown.so[b7f8e000+8000]

I traced back the crash point to system-settings/plugins/ifupdown/parser.c, line
245, in the normalize_psk function.

Apparently, nm_setting_wireless_get_ssid returns NULL as ssid. Does it mean the SSID is empty or is there some other problem causing that? Anyway, with the following patch, the crash does not show up anymore.

--- parser.c	2009-06-03 22:37:46.923274704 +0200
+++ /tmp/NetworkManager-0.7.1/system-settings/plugins/ifupdown/parser.c	2009-03-03 18:59:50.000000000 +0100
@@ -245,7 +245,7 @@
 		unsigned char *buf = g_malloc0 (WPA_PMK_LEN * 2);
 
 		ssid = nm_setting_wireless_get_ssid (s_wireless);
-		pbkdf2_sha1 (value, ssid ? (char *) ssid->data : NULL, ssid ? ssid->len : 0, 4096, buf, WPA_PMK_LEN);
+		pbkdf2_sha1 (value, (char *) ssid->data, ssid->len, 4096, buf, WPA_PMK_LEN);
 		normalized = utils_bin2hexstr ((const char *) buf, WPA_PMK_LEN, WPA_PMK_LEN * 2);
 		g_free (buf);
 	}