[LTP] [PATCH] userns/userns08.c: Enable userns in max_user_namespaces file
From: xuyang2018.jy@fujitsu.com <xuyang2018.jy@fujitsu.com>
Date: 2021-08-18 09:57:09
Hi! My machine's time is wrong, so I sent this patch today but the email's date is 8.5(It may lose your attention). Best Regards Yang Xu
quoted hunk ↗ jump to hunk
On old distros ie centos7, the default value of max_user_namespaces is set to 0. Enable it by increasing this value. Signed-off-by: Yang Xu<xuyang2018.jy@fujitsu.com> --- testcases/kernel/containers/userns/userns08.c | 9 +++++++++ 1 file changed, 9 insertions(+)diff --git a/testcases/kernel/containers/userns/userns08.c b/testcases/kernel/containers/userns/userns08.c index aedfc6c4e..0910ea7d4 100644 --- a/testcases/kernel/containers/userns/userns08.c +++ b/testcases/kernel/containers/userns/userns08.c@@ -120,6 +120,11 @@ static void setup(void) SAFE_WRITE(fd, 1, "\n", 1); SAFE_CLOSE(fd); + + /* The default value of max_user_namespaces is set to 0 on some distros, + * We need to change the default value to call clone(). + */ + SAFE_FILE_PRINTF("/proc/sys/user/max_user_namespaces", "%d", 10); } static struct tst_test test = {@@ -133,6 +138,10 @@ static struct tst_test test = { "CONFIG_USER_NS", NULL }, + .save_restore = (const char * const[]) { + "?/proc/sys/user/max_user_namespaces", + NULL, + }, .tags = (const struct tst_tag[]) { {"linux-git", "d2f007dbe7e4"}, {"CVE", "CVE-2018-18955"},