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logind: only release logind session from the PAM module if the same module instance actually created it

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This commit is contained in:
Lennart Poettering 2012-10-16 19:21:21 +02:00
parent 183de6d7d9
commit 7708588119
2 changed files with 21 additions and 4 deletions
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8
src/login/logind-dbus.c
View File

@ -83,6 +83,7 @@
" <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n" \
" <arg name=\"seat\" type=\"s\" direction=\"out\"/>\n" \
" <arg name=\"vtnr\" type=\"u\" direction=\"out\"/>\n" \
" <arg name=\"existing\" type=\"b\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ReleaseSession\">\n" \
" <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
@ -300,7 +301,7 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
User *user = NULL;
const char *type, *class, *seat, *tty, *display, *remote_user, *remote_host, *service;
uint32_t uid, leader, audit_id = 0;
dbus_bool_t remote, kill_processes;
dbus_bool_t remote, kill_processes, exists;
char **controllers = NULL, **reset_controllers = NULL;
SessionType t;
SessionClass c;
@ -518,6 +519,8 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
seat = session->seat ? session->seat->id : "";
vtnr = session->vtnr;
exists = true;
b = dbus_message_append_args(
reply,
DBUS_TYPE_STRING, &session->id,
@ -526,6 +529,7 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
DBUS_TYPE_UNIX_FD, &fifo_fd,
DBUS_TYPE_STRING, &seat,
DBUS_TYPE_UINT32, &vtnr,
DBUS_TYPE_BOOLEAN, &exists,
DBUS_TYPE_INVALID);
free(p);
@ -642,6 +646,7 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
}
seat = s ? s->id : "";
exists = false;
b = dbus_message_append_args(
reply,
DBUS_TYPE_STRING, &session->id,
@ -650,6 +655,7 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
DBUS_TYPE_UNIX_FD, &fifo_fd,
DBUS_TYPE_STRING, &seat,
DBUS_TYPE_UINT32, &vtnr,
DBUS_TYPE_BOOLEAN, &exists,
DBUS_TYPE_INVALID);
free(p);

17
src/login/pam-module.c
View File

@ -331,7 +331,7 @@ _public_ PAM_EXTERN int pam_sm_open_session(
int session_fd = -1;
DBusConnection *bus = NULL;
DBusMessage *m = NULL, *reply = NULL;
dbus_bool_t remote;
dbus_bool_t remote, existing;
int r;
uint32_t vtnr = 0;
@ -543,6 +543,7 @@ _public_ PAM_EXTERN int pam_sm_open_session(
DBUS_TYPE_UNIX_FD, &session_fd,
DBUS_TYPE_STRING, &seat,
DBUS_TYPE_UINT32, &vtnr,
DBUS_TYPE_BOOLEAN, &existing,
DBUS_TYPE_INVALID)) {
pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", bus_error_message(&error));
r = PAM_SESSION_ERR;
@ -586,6 +587,12 @@ _public_ PAM_EXTERN int pam_sm_open_session(
}
}
r = pam_set_data(handle, "systemd.existing", INT_TO_PTR(!!existing), NULL);
if (r != PAM_SUCCESS) {
pam_syslog(handle, LOG_ERR, "Failed to install existing flag.");
return r;
}
if (session_fd >= 0) {
r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL);
if (r != PAM_SUCCESS) {
@ -628,7 +635,7 @@ _public_ PAM_EXTERN int pam_sm_close_session(
int flags,
int argc, const char **argv) {
const void *p = NULL;
const void *p = NULL, *existing = NULL;
const char *id;
DBusConnection *bus = NULL;
DBusMessage *m = NULL, *reply = NULL;
@ -639,8 +646,12 @@ _public_ PAM_EXTERN int pam_sm_close_session(
dbus_error_init(&error);
/* Only release session if it wasn't pre-existing when we
* tried to create it */
pam_get_data(handle, "systemd.existing", &existing);
id = pam_getenv(handle, "XDG_SESSION_ID");
if (id) {
if (id && !existing) {
/* Before we go and close the FIFO we need to tell
* logind that this is a clean session shutdown, so