diff -up openssh-7.4p1/log.c.log-in-chroot openssh-7.4p1/log.c
--- openssh-7.4p1/log.c.log-in-chroot 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/log.c 2016-12-23 15:14:33.330168088 +0100
@@ -250,6 +250,11 @@ debug3(const char *fmt,...)
void
log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
{
+ log_init_handler(av0, level, facility, on_stderr, 1);
+}
+
+void
+log_init_handler(char *av0, LogLevel level, SyslogFacility facility, int on_stderr, int reset_handler) {
#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
struct syslog_data sdata = SYSLOG_DATA_INIT;
#endif
@@ -273,8 +278,10 @@ log_init(char *av0, LogLevel level, Sysl
exit(1);
}
- log_handler = NULL;
- log_handler_ctx = NULL;
+ if (reset_handler) {
+ log_handler = NULL;
+ log_handler_ctx = NULL;
+ }
log_on_stderr = on_stderr;
if (on_stderr)
diff -up openssh-7.4p1/log.h.log-in-chroot openssh-7.4p1/log.h
--- openssh-7.4p1/log.h.log-in-chroot 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/log.h 2016-12-23 15:14:33.330168088 +0100
@@ -49,6 +49,7 @@ typedef enum {
typedef void (log_handler_fn)(LogLevel, const char *, void *);
void log_init(char *, LogLevel, SyslogFacility, int);
+void log_init_handler(char *, LogLevel, SyslogFacility, int, int);
LogLevel log_level_get(void);
int log_change_level(LogLevel);
int log_is_on_stderr(void);
diff -up openssh-7.4p1/monitor.c.log-in-chroot openssh-7.4p1/monitor.c
--- openssh-7.4p1/monitor.c.log-in-chroot 2016-12-23 15:14:33.311168085 +0100
+++ openssh-7.4p1/monitor.c 2016-12-23 15:16:42.154193100 +0100
@@ -307,6 +307,8 @@ monitor_child_preauth(Authctxt *_authctx
close(pmonitor->m_log_sendfd);
pmonitor->m_log_sendfd = pmonitor->m_recvfd = -1;
+ pmonitor->m_state = "preauth";
+
authctxt = _authctxt;
memset(authctxt, 0, sizeof(*authctxt));
ssh->authctxt = authctxt;
@@ -405,6 +407,8 @@ monitor_child_postauth(struct monitor *p
close(pmonitor->m_recvfd);
pmonitor->m_recvfd = -1;
+ pmonitor->m_state = "postauth";
+
monitor_set_child_handler(pmonitor->m_pid);
signal(SIGHUP, &monitor_child_handler);
signal(SIGTERM, &monitor_child_handler);
@@ -472,7 +476,7 @@ monitor_read_log(struct monitor *pmonito
if (log_level_name(level) == NULL)
fatal("%s: invalid log level %u (corrupted message?)",
__func__, level);
- do_log2(level, "%s [preauth]", msg);
+ do_log2(level, "%s [%s]", msg, pmonitor->m_state);
sshbuf_free(logmsg);
free(msg);
@@ -1719,13 +1723,28 @@ monitor_init(void)
mon = xcalloc(1, sizeof(*mon));
monitor_openfds(mon, 1);
+ mon->m_state = "";
+
return mon;
}
void
-monitor_reinit(struct monitor *mon)
+monitor_reinit(struct monitor *mon, const char *chroot_dir)
{
- monitor_openfds(mon, 0);
+ struct stat dev_log_stat;
+ char *dev_log_path;
+ int do_logfds = 0;
+
+ if (chroot_dir != NULL) {
+ xasprintf(&dev_log_path, "%s/dev/log", chroot_dir);
+
+ if (stat(dev_log_path, &dev_log_stat) != 0) {
+ debug("%s: /dev/log doesn't exist in %s chroot - will try to log via monitor using [postauth] suffix", __func__, chroot_dir);
+ do_logfds = 1;
+ }
+ free(dev_log_path);
+ }
+ monitor_openfds(mon, do_logfds);
}
#ifdef GSSAPI
diff -up openssh-7.4p1/monitor.h.log-in-chroot openssh-7.4p1/monitor.h
--- openssh-7.4p1/monitor.h.log-in-chroot 2016-12-23 15:14:33.330168088 +0100
+++ openssh-7.4p1/monitor.h 2016-12-23 15:16:28.372190424 +0100
@@ -83,10 +83,11 @@ struct monitor {
int m_log_sendfd;
struct kex **m_pkex;
pid_t m_pid;
+ char *m_state;
};
struct monitor *monitor_init(void);
-void monitor_reinit(struct monitor *);
+void monitor_reinit(struct monitor *, const char *);
struct Authctxt;
void monitor_child_preauth(struct Authctxt *, struct monitor *);
diff -up openssh-7.4p1/session.c.log-in-chroot openssh-7.4p1/session.c
--- openssh-7.4p1/session.c.log-in-chroot 2016-12-23 15:14:33.319168086 +0100
+++ openssh-7.4p1/session.c 2016-12-23 15:18:18.742211853 +0100
@@ -160,6 +160,7 @@ login_cap_t *lc;
static int is_child = 0;
static int in_chroot = 0;
+static int have_dev_log = 1;
/* File containing userauth info, if ExposeAuthInfo set */
static char *auth_info_file = NULL;
@@ -619,6 +620,7 @@ do_exec(Session *s, const char *command)
int ret;
const char *forced = NULL, *tty = NULL;
char session_type[1024];
+ struct stat dev_log_stat;
if (options.adm_forced_command) {
original_command = command;
@@ -676,6 +678,10 @@ do_exec(Session *s, const char *command)
tty += 5;
}
+ if (lstat("/dev/log", &dev_log_stat) != 0) {
+ have_dev_log = 0;
+ }
+
verbose("Starting session: %s%s%s for %s from %.200s port %d id %d",
session_type,
tty == NULL ? "" : " on ",
@@ -1486,14 +1492,6 @@ child_close_fds(void)
* descriptors left by system functions. They will be closed later.
*/
endpwent();
-
- /*
- * Close any extra open file descriptors so that we don't have them
- * hanging around in clients. Note that we want to do this after
- * initgroups, because at least on Solaris 2.3 it leaves file
- * descriptors open.
- */
- closefrom(STDERR_FILENO + 1);
}
/*
@@ -1629,8 +1627,6 @@ do_child(Session *s, const char *command
exit(1);
}
- closefrom(STDERR_FILENO + 1);
-
do_rc_files(ssh, s, shell);
/* restore SIGPIPE for child */
@@ -1653,9 +1649,17 @@ do_child(Session *s, const char *command
argv[i] = NULL;
optind = optreset = 1;
__progname = argv[0];
- exit(sftp_server_main(i, argv, s->pw));
+ exit(sftp_server_main(i, argv, s->pw, have_dev_log));
}
+ /*
+ * Close any extra open file descriptors so that we don't have them
+ * hanging around in clients. Note that we want to do this after
+ * initgroups, because at least on Solaris 2.3 it leaves file
+ * descriptors open.
+ */
+ closefrom(STDERR_FILENO + 1);
+
fflush(NULL);
/* Get the last component of the shell name. */
diff -up openssh-7.4p1/sftp.h.log-in-chroot openssh-7.4p1/sftp.h
--- openssh-7.4p1/sftp.h.log-in-chroot 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/sftp.h 2016-12-23 15:14:33.331168088 +0100
@@ -97,5 +97,5 @@
struct passwd;
-int sftp_server_main(int, char **, struct passwd *);
+int sftp_server_main(int, char **, struct passwd *, int);
void sftp_server_cleanup_exit(int) __attribute__((noreturn));
diff -up openssh-7.4p1/sftp-server.c.log-in-chroot openssh-7.4p1/sftp-server.c
--- openssh-7.4p1/sftp-server.c.log-in-chroot 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/sftp-server.c 2016-12-23 15:14:33.331168088 +0100
@@ -1497,7 +1497,7 @@ sftp_server_usage(void)
}
int
-sftp_server_main(int argc, char **argv, struct passwd *user_pw)
+sftp_server_main(int argc, char **argv, struct passwd *user_pw, int reset_handler)
{
fd_set *rset, *wset;
int i, r, in, out, max, ch, skipargs = 0, log_stderr = 0;
@@ -1511,7 +1511,7 @@ sftp_server_main(int argc, char **argv,
ssh_malloc_init(); /* must be called before any mallocs */
__progname = ssh_get_progname(argv[0]);
- log_init(__progname, log_level, log_facility, log_stderr);
+ log_init_handler(__progname, log_level, log_facility, log_stderr, reset_handler);
pw = pwcopy(user_pw);
@@ -1582,7 +1582,7 @@ sftp_server_main(int argc, char **argv,
}
}
- log_init(__progname, log_level, log_facility, log_stderr);
+ log_init_handler(__progname, log_level, log_facility, log_stderr, reset_handler);
/*
* On platforms where we can, avoid making /proc/self/{mem,maps}
diff -up openssh-7.4p1/sftp-server-main.c.log-in-chroot openssh-7.4p1/sftp-server-main.c
--- openssh-7.4p1/sftp-server-main.c.log-in-chroot 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/sftp-server-main.c 2016-12-23 15:14:33.331168088 +0100
@@ -49,5 +49,5 @@ main(int argc, char **argv)
return 1;
}
- return (sftp_server_main(argc, argv, user_pw));
+ return (sftp_server_main(argc, argv, user_pw, 0));
}
diff -up openssh-7.4p1/sshd.c.log-in-chroot openssh-7.4p1/sshd.c
--- openssh-7.4p1/sshd.c.log-in-chroot 2016-12-23 15:14:33.328168088 +0100
+++ openssh-7.4p1/sshd.c 2016-12-23 15:14:33.332168088 +0100
@@ -650,7 +650,7 @@ privsep_postauth(Authctxt *authctxt)
}
/* New socket pair */
- monitor_reinit(pmonitor);
+ monitor_reinit(pmonitor, options.chroot_directory);
pmonitor->m_pid = fork();
if (pmonitor->m_pid == -1)
@@ -668,6 +668,11 @@ privsep_postauth(Authctxt *authctxt)
close(pmonitor->m_sendfd);
pmonitor->m_sendfd = -1;
+ close(pmonitor->m_log_recvfd);
+ pmonitor->m_log_recvfd = -1;
+
+ if (pmonitor->m_log_sendfd != -1)
+ set_log_handler(mm_log_handler, pmonitor);
/* Demote the private keys to public keys. */
demote_sensitive_data();