test: Check nomemfd parasite injection

By default criu tries to create parasite mem with memfd syscall,
which is present in many systems. Let's check also the legacy way.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/fault-injection.h

@@ -8,6 +8,7 @@ enum faults {
 	FI_RESTORE_ROOT_ONLY,
 	/* not fatal */
 	FI_CHECK_OPEN_HANDLE = 128,
+	FI_NO_MEMFD = 129,
 	FI_MAX,
 };
 

criu/parasite-syscall.c

@@ -28,6 +28,7 @@
 #include "vma.h"
 #include "proc_parse.h"
 #include "aio.h"
+#include "fault-injection.h"
 
 #include <string.h>
 #include <stdlib.h>
@@ -1192,6 +1193,9 @@ static int parasite_memfd_exchange(struct parasite_ctl *ctl, unsigned long size)
 	unsigned long sret = -ENOSYS;
 	int ret, fd, lfd;
 
+	if (fault_injected(FI_NO_MEMFD))
+		return 1;
+
 	BUILD_BUG_ON(sizeof(orig_code) < sizeof(long));
 
 	if (ptrace_swap_area(pid, where, (void *)orig_code, sizeof(orig_code))) {

test/jenkins/criu-fault.sh

@@ -5,3 +5,4 @@ prep
 ./test/zdtm.py run -t zdtm/static/env00 --fault 1 --keep-going --report report -f h || fail
 ./test/zdtm.py run -t zdtm/static/unlink_fstat00 --fault 2 --keep-going --report report -f h || fail
 ./test/zdtm.py run -t zdtm/static/inotify_irmap --fault 128 --keep-going --pre 2 -f uns || fail
+./test/zdtm.py run -t zdtm/static/env00 --fault 129 -f uns || fail