[CRIU] [PATCH] zdtm.sh: mount devpts with newinstance in zdtm containers

[Andrey Vagin]

Otherwise here is a race condition. A first test allocates /dev/pts/X
and it is dumped. Then a second test allocates the same tty /dev/pts/X.
If the first test will be restored in this moment, criu will fail:
(00.041789)     85: Error (tty.c:285): tty: Unable to open /dev/ptmx
with specified index 0

Fixes: bb5f5b19c613 "zdtm: add ability to execute non-namespacess tests concurrently"
Reported-by: Mr Jenkins
Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
 test/zdtm.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/zdtm.sh b/test/zdtm.sh
index 569ce94..395b256 100755
--- a/test/zdtm.sh
+++ b/test/zdtm.sh
@@ -884,6 +884,9 @@ while :; do
 					mount --make-rprivate / &&
 					umount -l /proc &&
 					mount -t proc proc /proc/ &&
+					umount -l /dev/pts &&
+					mount -t devpts zdtm_pts /dev/pts -o newinstance,ptmxmode=666 &&
+					mount --bind /dev/pts/ptmx /dev/ptmx &&
 					./zdtm.sh $args
 				)"
 			exit
-- 
1.9.3