faul-inject: Check a case when parasite can't initialize a command socket

Give a fake address for a server socket.
Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/fault-injection.h

@@ -8,6 +8,7 @@ enum faults {
 	FI_RESTORE_ROOT_ONLY,
 	FI_DUMP_PAGES,
 	FI_RESTORE_OPEN_LINK_REMAP,
+	FI_PARASITE_CONNECT,
 	/* not fatal */
 	FI_CHECK_OPEN_HANDLE = 128,
 	FI_NO_MEMFD = 129,

criu/parasite-syscall.c

@@ -468,6 +468,10 @@ static int prepare_tsock(struct parasite_ctl *ctl, pid_t pid,
 		}
 	}
 
+	/* Check a case when parasite can't initialize a command socket */
+	if (fault_injected(FI_PARASITE_CONNECT))
+		args->h_addr_len = gen_parasite_saddr(&args->h_addr, getpid() + 1);
+
 	/*
 	 * Set to -1 to prevent any accidental misuse. The
 	 * only valid user of it is accept_tsock().

test/jenkins/criu-fault.sh

@@ -12,3 +12,5 @@ prep
 
 ./test/zdtm.py run -t zdtm/static/mntns_ghost --fault 2 --keep-going --report report || fail
 ./test/zdtm.py run -t zdtm/static/mntns_ghost --fault 4 --keep-going --report report || fail
+
+./test/zdtm.py run -t zdtm/static/env00 --fault 5 --keep-going --report report || fail