|
 |
923a60 |
From 5a7f49bb38bc1d7965d497e775b7cc8053b0c465 Mon Sep 17 00:00:00 2001
|
|
|
923a60 |
From: Jan Synacek <jsynacek@redhat.com>
|
|
|
923a60 |
Date: Fri, 18 Aug 2017 10:17:22 +0200
|
|
|
923a60 |
Subject: [PATCH] log: never log into foreign fd #2 in PID 1 or its
|
|
|
923a60 |
pre-execve() children
|
|
|
923a60 |
|
|
|
923a60 |
(cherry picked from commit 48a601fe5de8aa0d89ba6dadde168769fa7ce992)
|
|
|
923a60 |
Resolves: #1420505
|
|
|
923a60 |
---
|
|
|
923a60 |
src/core/main.c | 11 +++++++++--
|
|
|
923a60 |
src/shared/log.c | 7 ++++++-
|
|
|
923a60 |
src/shared/log.h | 1 +
|
|
|
923a60 |
3 files changed, 16 insertions(+), 3 deletions(-)
|
|
|
923a60 |
|
|
|
923a60 |
diff --git a/src/core/main.c b/src/core/main.c
|
|
|
923a60 |
index 37e3ea0ced..66393ed6ad 100644
|
|
|
923a60 |
--- a/src/core/main.c
|
|
|
923a60 |
+++ b/src/core/main.c
|
|
|
923a60 |
@@ -1310,10 +1310,17 @@ int main(int argc, char *argv[]) {
|
|
|
923a60 |
log_show_color(isatty(STDERR_FILENO) > 0);
|
|
|
923a60 |
log_set_upgrade_syslog_to_journal(true);
|
|
|
923a60 |
|
|
|
923a60 |
- /* Disable the umask logic */
|
|
|
923a60 |
- if (getpid() == 1)
|
|
|
923a60 |
+ if (getpid() == 1) {
|
|
|
923a60 |
+ /* Disable the umask logic */
|
|
|
923a60 |
umask(0);
|
|
|
923a60 |
|
|
|
923a60 |
+ /* Always reopen /dev/console when running as PID 1 or one of its pre-execve() children. This is
|
|
|
923a60 |
+ * important so that we never end up logging to any foreign stderr, for example if we have to log in a
|
|
|
923a60 |
+ * child process right before execve()'ing the actual binary, at a point in time where socket
|
|
|
923a60 |
+ * activation stderr/stdout area already set up. */
|
|
|
923a60 |
+ log_set_always_reopen_console(true);
|
|
|
923a60 |
+ }
|
|
|
923a60 |
+
|
|
|
923a60 |
if (getpid() == 1 && detect_container(NULL) <= 0) {
|
|
|
923a60 |
|
|
|
923a60 |
/* Running outside of a container as PID 1 */
|
|
|
923a60 |
diff --git a/src/shared/log.c b/src/shared/log.c
|
|
|
923a60 |
index 646a1d6389..3491420308 100644
|
|
|
923a60 |
--- a/src/shared/log.c
|
|
|
923a60 |
+++ b/src/shared/log.c
|
|
|
923a60 |
@@ -52,6 +52,7 @@ static bool show_color = false;
|
|
|
923a60 |
static bool show_location = false;
|
|
|
923a60 |
|
|
|
923a60 |
static bool upgrade_syslog_to_journal = false;
|
|
|
923a60 |
+static bool always_reopen_console = false;
|
|
|
923a60 |
|
|
|
923a60 |
/* Akin to glibc's __abort_msg; which is private and we hence cannot
|
|
|
923a60 |
* use here. */
|
|
|
923a60 |
@@ -75,7 +76,7 @@ static int log_open_console(void) {
|
|
|
923a60 |
if (console_fd >= 0)
|
|
|
923a60 |
return 0;
|
|
|
923a60 |
|
|
|
923a60 |
- if (getpid() == 1) {
|
|
|
923a60 |
+ if (always_reopen_console) {
|
|
|
923a60 |
console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
|
|
|
923a60 |
if (console_fd < 0)
|
|
|
923a60 |
return console_fd;
|
|
|
923a60 |
@@ -1061,3 +1062,7 @@ void log_received_signal(int level, const struct signalfd_siginfo *si) {
|
|
|
923a60 |
void log_set_upgrade_syslog_to_journal(bool b) {
|
|
|
923a60 |
upgrade_syslog_to_journal = b;
|
|
|
923a60 |
}
|
|
|
923a60 |
+
|
|
|
923a60 |
+void log_set_always_reopen_console(bool b) {
|
|
|
923a60 |
+ always_reopen_console = b;
|
|
|
923a60 |
+}
|
|
|
923a60 |
diff --git a/src/shared/log.h b/src/shared/log.h
|
|
|
923a60 |
index 2889e1e77f..3c9448f1a7 100644
|
|
|
923a60 |
--- a/src/shared/log.h
|
|
|
923a60 |
+++ b/src/shared/log.h
|
|
|
923a60 |
@@ -210,3 +210,4 @@ LogTarget log_target_from_string(const char *s) _pure_;
|
|
|
923a60 |
void log_received_signal(int level, const struct signalfd_siginfo *si);
|
|
|
923a60 |
|
|
|
923a60 |
void log_set_upgrade_syslog_to_journal(bool b);
|
|
|
923a60 |
+void log_set_always_reopen_console(bool b);
|