[CRIU] [PATCH 10/11] restore: set PR_SET_DUMPABLE to have access to proc files

[Andrey Vagin]

It is cleared when a process is forked in a new userns.

Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
 cr-restore.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/cr-restore.c b/cr-restore.c
index 9abb1c3..fd4f8fe 100644
--- a/cr-restore.c
+++ b/cr-restore.c
@@ -1347,9 +1347,15 @@ static int restore_task_with_children(void *_arg)
 			exit(1);
 
 		/* UID and GID must be set after restoring /proc/PID/{uid,gid}_maps */
-		if ((ca->clone_flags & CLONE_NEWUSER) && (setuid(0) || setgid(0))) {
-			pr_perror("Unable to initialize id-s");
-			exit(1);
+		if ((ca->clone_flags & CLONE_NEWUSER)) {
+			if (setuid(0) || setgid(0)) {
+				pr_perror("Unable to initialize id-s");
+				exit(1);
+			}
+			if (prctl(PR_SET_DUMPABLE, 1, 0)) {
+				pr_perror("Unable to set PR_SET_DUMPABLE");
+				exit(1);
+			}
 		}
 
 		if (prepare_namespace(current, ca->clone_flags))
-- 
1.9.3