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nsswitch: fix crash on null pam change pw response

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The function _pam_winbind_change_pwd crashes due to a null value passed
to the function strcasecmp and denies to login via graphical login
manager. Check for a null value before doing a strcasecmp.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1003296
Bug: https://bugzilla.samba.org/show_bug.cgi?id=9013

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Wed Sep 12 00:07:28 CEST 2012 on sn-devel-104
This commit is contained in:
Luca Lorenzetto 2012-09-11 18:35:42 +02:00 committed by David Disseldorp
parent df5f962c60
commit 4e595f4bf0
1 changed files with 1 additions and 1 deletions
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2
nsswitch/pam_winbind.c
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@ -831,7 +831,7 @@ static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
}
_pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
if (strcasecmp(resp->resp, "yes") == 0) {
if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
retval = true;
}