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# Run client before starting syslogd.
# The client tries to fill up the kernel stash with invalid messages.
# The client writes one message before and one after syslogd is started.
# Start syslogd, it reads the second message from the log socket.
# Find the log message in file, syslogd, server log.
# Check that the first message got lost.
# Create a ktrace dump of the client and check that sendsyslog(2) has failed.
# Check that kernel did not write sendsyslog(2) error message to log socket.
use strict;
use warnings;
use Errno ':POSIX';
require 'sys/syscall.ph';
use constant LOGSTASH_SIZE => 100;
my $errno = ENOTCONN;
$! = $errno;
my $error = $!;
my $kerngrep = qr/sendsyslog: dropped \d+ messages?/;
our %args = (
client => {
early => 1,
func => sub {
my $self = shift;
foreach (0..LOGSTASH_SIZE) {
# bad system call, NULL pointer as message
syscall(&SYS_sendsyslog, 0, 42, 0) != -1
or warn ref($self), " sendsyslog NULL failed: $!";
}
write_between2logs($self, sub {
my $self = shift;
${$self->{syslogd}}->loggrep(qr/syslogd: started/, 5)
or die ref($self), " syslogd started not in syslogd.log";
})},
ktrace => {
qr/CALL (\(via syscall\) )?sendsyslog\(/ => '>=103',
qr/RET sendsyslog -1 errno $errno / => 102,
},
loggrep => {
get_firstlog() => 1,
qr/Client sendsyslog NULL failed: $error/ => 101,
get_testgrep() => 1,
},
},
syslogd => {
loggrep => {
get_firstlog() => 1,
qr/msg $kerngrep/ => 0,
get_testgrep() => 1,
},
},
server => {
loggrep => {
get_firstlog() => 1,
$kerngrep => 0,
get_testgrep() => 1,
},
},
file => {
loggrep => {
get_firstlog() => 1,
$kerngrep => 0,
get_testgrep() => 1,
},
},
);
1;
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