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vsftpd/0056-Log-die-calls-to-syslog.patch
Ondřej Lysoněk 7c0626d6c4 Fix a segfault when running as PID 1 
Also rebase the patches.
2018-07-25 13:32:54 +02:00

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From ee6af258e8cb1a7fada5e6d3e54429b89f12b158 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Lyson=C4=9Bk?= <olysonek@redhat.com>
Date: Fri, 15 Jun 2018 12:02:21 +0200
Subject: [PATCH 56/59] Log die() calls to syslog
Pass messages given to die(), die2() and bug() to syslog. Currently this
functionality requires waiting for a short amount of time (1 second is
used) after logging the message and before exiting. This is a workaround
for the following systemd bug:
https://github.com/systemd/systemd/issues/2913
The need for this workaround is the main reason why I decided not to
enable this functionality by default.
Resolves: rhbz#1318198
Resolves: rhbz#1582672
---
logging.c | 13 +++++++++----
logging.h | 2 ++
main.c | 4 ++++
parseconf.c | 1 +
tcpwrap.c | 3 ---
tunables.c | 2 ++
tunables.h | 2 ++
utility.c | 11 +++++++++++
vsftpd.conf.5 | 10 ++++++++++
9 files changed, 41 insertions(+), 7 deletions(-)
diff --git a/logging.c b/logging.c
index c4461f7..9e86808 100644
--- a/logging.c
+++ b/logging.c
@@ -30,10 +30,6 @@ static void vsf_log_do_log_to_file(int fd, struct mystr* p_str);
void
vsf_log_init(struct vsf_session* p_sess)
{
- if (tunable_syslog_enable || tunable_tcp_wrappers)
- {
- vsf_sysutil_openlog(0);
- }
if (!tunable_xferlog_enable && !tunable_dual_log_enable)
{
return;
@@ -389,3 +385,12 @@ vsf_log_do_log_vsftpd_format(struct vsf_session* p_sess, struct mystr* p_str,
}
}
+void
+vsf_log_die(const char* p_text)
+{
+ struct mystr log_str = INIT_MYSTR;
+
+ str_append_text(&log_str, "ERROR: ");
+ str_append_text(&log_str, p_text);
+ str_syslog(&log_str, 1);
+}
diff --git a/logging.h b/logging.h
index 1ff57d1..75f06c1 100644
--- a/logging.h
+++ b/logging.h
@@ -91,5 +91,7 @@ void vsf_log_line(struct vsf_session* p_sess, enum EVSFLogEntryType what,
void vsf_log_failed_line(struct vsf_session* p_sess, enum EVSFLogEntryType what,
struct mystr* p_str);
+void vsf_log_die(const char* p_text);
+
#endif /* VSF_LOGGING_H */
diff --git a/main.c b/main.c
index f039081..1178d44 100644
--- a/main.c
+++ b/main.c
@@ -120,6 +120,10 @@ main(int argc, const char* argv[])
}
vsf_sysutil_free(p_statbuf);
}
+ if (tunable_log_die || tunable_syslog_enable || tunable_tcp_wrappers)
+ {
+ vsf_sysutil_openlog(0);
+ }
/* Resolve pasv_address if required */
if (tunable_pasv_address && tunable_pasv_addr_resolve)
{
diff --git a/parseconf.c b/parseconf.c
index 47b54f1..aeb401a 100644
--- a/parseconf.c
+++ b/parseconf.c
@@ -112,6 +112,7 @@ parseconf_bool_array[] =
{ "seccomp_sandbox", &tunable_seccomp_sandbox },
{ "allow_writeable_chroot", &tunable_allow_writeable_chroot },
{ "better_stou", &tunable_better_stou },
+ { "log_die", &tunable_log_die },
{ 0, 0 }
};
diff --git a/tcpwrap.c b/tcpwrap.c
index 5bf57d3..132b771 100644
--- a/tcpwrap.c
+++ b/tcpwrap.c
@@ -27,15 +27,12 @@ int
vsf_tcp_wrapper_ok(int remote_fd)
{
struct request_info req;
- vsf_sysutil_openlog(0);
request_init(&req, RQ_DAEMON, "vsftpd", RQ_FILE, remote_fd, 0);
fromhost(&req);
if (!hosts_access(&req))
{
- vsf_sysutil_closelog();
return 0;
}
- vsf_sysutil_closelog();
return 1;
}
diff --git a/tunables.c b/tunables.c
index 5ec2bdc..63de8e6 100644
--- a/tunables.c
+++ b/tunables.c
@@ -93,6 +93,7 @@ int tunable_http_enable;
int tunable_seccomp_sandbox;
int tunable_allow_writeable_chroot;
int tunable_better_stou;
+int tunable_log_die;
unsigned int tunable_accept_timeout;
unsigned int tunable_connect_timeout;
@@ -241,6 +242,7 @@ tunables_load_defaults()
tunable_seccomp_sandbox = 0;
tunable_allow_writeable_chroot = 0;
tunable_better_stou = 0;
+ tunable_log_die = 0;
tunable_accept_timeout = 60;
tunable_connect_timeout = 60;
diff --git a/tunables.h b/tunables.h
index 85ea1a8..8a4b8b2 100644
--- a/tunables.h
+++ b/tunables.h
@@ -96,6 +96,8 @@ extern int tunable_allow_writeable_chroot; /* Allow misconfiguration */
extern int tunable_better_stou; /* Use better file name generation
* algorithm for the STOU command
*/
+extern int tunable_log_die; /* Log calls to die(), die2()
+ * and bug() */
/* Integer/numeric defines */
extern unsigned int tunable_accept_timeout;
diff --git a/utility.c b/utility.c
index 5fd714d..75e5bdd 100644
--- a/utility.c
+++ b/utility.c
@@ -9,6 +9,8 @@
#include "sysutil.h"
#include "str.h"
#include "defs.h"
+#include "logging.h"
+#include "tunables.h"
#define DIE_DEBUG
@@ -41,11 +43,20 @@ void
bug(const char* p_text)
{
/* Rats. Try and write the reason to the network for diagnostics */
+ if (tunable_log_die)
+ {
+ vsf_log_die(p_text);
+ }
vsf_sysutil_activate_noblock(VSFTP_COMMAND_FD);
(void) vsf_sysutil_write_loop(VSFTP_COMMAND_FD, "500 OOPS: ", 10);
(void) vsf_sysutil_write_loop(VSFTP_COMMAND_FD, p_text,
vsf_sysutil_strlen(p_text));
(void) vsf_sysutil_write_loop(VSFTP_COMMAND_FD, "\r\n", 2);
+ if (tunable_log_die)
+ {
+ /* Workaround for https://github.com/systemd/systemd/issues/2913 */
+ vsf_sysutil_sleep(1.0);
+ }
vsf_sysutil_exit(2);
}
diff --git a/vsftpd.conf.5 b/vsftpd.conf.5
index e9ae474..f246906 100644
--- a/vsftpd.conf.5
+++ b/vsftpd.conf.5
@@ -358,6 +358,16 @@ wanting to e.g. append a file.
Default: YES
.TP
+.B log_die
+Log an error to syslog when some error condition occurs and vsftpd decides
+to quit. Internally, the error messages given to the functions die(), die2()
+and bug() are passed to syslog. Currently this functionality requires waiting
+for a short amount of time (1 second is used) after logging the message and
+before exiting. This is a workaround for the following systemd bug:
+https://github.com/systemd/systemd/issues/2913
+
+Default: NO
+.TP
.B log_ftp_protocol
When enabled, all FTP requests and responses are logged, providing the option
xferlog_std_format is not enabled. Useful for debugging.
--
2.14.4
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