systemd/SOURCES/0031-login-avoid-leak-of-name-returned-by-uid_to_name.patch
2021-10-08 17:02:03 +00:00

61 lines
2.3 KiB
Diff

From 8fdca31b41a6470ceda8e0a84f90a1e5ca28aa5c Mon Sep 17 00:00:00 2001
From: David Tardon <dtardon@redhat.com>
Date: Tue, 9 Oct 2018 17:26:19 +0200
Subject: [PATCH] login: avoid leak of name returned by uid_to_name()
(cherry picked from commit e99742ef3e9d847da04e71fec0eb426063b25068)
Resolves: #1602706
---
src/login/logind-dbus.c | 4 +++-
src/login/logind-utmp.c | 6 +++---
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 13298cc855..dca7f4a30f 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -2155,6 +2155,7 @@ static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userd
if (cancelled && m->enable_wall_messages) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_free_ char *username = NULL;
const char *tty = NULL;
uid_t uid = 0;
int r;
@@ -2165,8 +2166,9 @@ static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userd
(void) sd_bus_creds_get_tty(creds, &tty);
}
+ username = uid_to_name(uid);
utmp_wall("The system shutdown has been cancelled",
- uid_to_name(uid), tty, logind_wall_tty_filter, m);
+ username, tty, logind_wall_tty_filter, m);
}
return sd_bus_reply_method_return(message, "b", cancelled);
diff --git a/src/login/logind-utmp.c b/src/login/logind-utmp.c
index 71ebdfcfb1..8bdd4ab6bf 100644
--- a/src/login/logind-utmp.c
+++ b/src/login/logind-utmp.c
@@ -61,7 +61,7 @@ bool logind_wall_tty_filter(const char *tty, void *userdata) {
static int warn_wall(Manager *m, usec_t n) {
char date[FORMAT_TIMESTAMP_MAX] = {};
- _cleanup_free_ char *l = NULL;
+ _cleanup_free_ char *l = NULL, *username = NULL;
usec_t left;
int r;
@@ -83,8 +83,8 @@ static int warn_wall(Manager *m, usec_t n) {
return 0;
}
- utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
- m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
+ username = uid_to_name(m->scheduled_shutdown_uid);
+ utmp_wall(l, username, m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
return 1;
}