[CRIU] [PATCH] zdtm: set the dumpable flag after setuid

[Andrey Vagin]

From: Andrew Vagin <avagin at virtuozzo.com>

Otherwise we will not able to access /proc/pid/* for the process.

Cc: Tycho Andersen <tycho.andersen at canonical.com>
Signed-off-by: Andrew Vagin <avagin at virtuozzo.com>
---
 test/zdtm/live/static/seccomp_filter.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/test/zdtm/live/static/seccomp_filter.c b/test/zdtm/live/static/seccomp_filter.c
index b1f13e4..329ac8a 100644
--- a/test/zdtm/live/static/seccomp_filter.c
+++ b/test/zdtm/live/static/seccomp_filter.c
@@ -97,7 +97,7 @@ int main(int argc, char ** argv)
 		if (filter_syscall(__NR_ptrace) < 0)
 			_exit(1);
 
-		if (filter_syscall(__NR_prctl) < 0)
+		if (filter_syscall(__NR_wait4) < 0)
 			_exit(1);
 
 		setuid(1000);
@@ -115,6 +115,18 @@ int main(int argc, char ** argv)
 			_exit(1);
 		}
 
+		prctl(PR_SET_DUMPABLE, 1);
+
+		if (write(sk, &c, 1) != 1) {
+			pr_perror("write");
+			_exit(1);
+		}
+
+		if (read(sk, &c, 1) != 1) {
+			pr_perror("read");
+			_exit(1);
+		}
+
 		/* We expect to be killed by our policy above. */
 		ptrace(PTRACE_TRACEME);
 
@@ -132,6 +144,15 @@ int main(int argc, char ** argv)
 	test_daemon();
 	test_waitsig();
 
+	if (write(sk, &c, 1) != 1) {
+		pr_perror("write");
+		goto err;
+	}
+	if ((ret = read(sk, &c, 1)) != 1) {
+		pr_perror("read %d", ret);
+		goto err;
+	}
+
 	mode = get_seccomp_mode(pid);
 	if (write(sk, &c, 1) != 1) {
 		pr_perror("write");
-- 
2.4.3