[LTP] [PATCH v2] syscalls/{fanotify17, getxattr05}: Fix the ENOSPC error

[Xiao Yang]

If the value of max_user_namespaces is set to 10 but more than
10 user namspaces are currently used on system.  In this case,
these tests fail with ENOSPC. for example:

# lsns -t user -n | wc -l
17

# ./fanotify17
...
fanotify17.c:174: TINFO: Test #0: Global groups limit in init user ns
fanotify17.c:130: TPASS: Created 128 groups - below groups limit (128)
fanotify17.c:174: TINFO: Test #1: Global groups limit in privileged user ns
fanotify17.c:154: TFAIL: unshare(CLONE_NEWUSER) failed: ENOSPC (28)
tst_test.c:452: TBROK: Invalid child (6958) exit value 1

Try to fix the issue by increasing the default value of
max_user_namespaces by 10.

Signed-off-by: Xiao Yang <ice_yangxiao@163.com>
---
 testcases/kernel/syscalls/fanotify/fanotify17.c | 2 +-
 testcases/kernel/syscalls/getxattr/getxattr05.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/testcases/kernel/syscalls/fanotify/fanotify17.c b/testcases/kernel/syscalls/fanotify/fanotify17.c
index 3ecb31b6e..a6206d953 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify17.c
+++ b/testcases/kernel/syscalls/fanotify/fanotify17.c
@@ -224,7 +224,7 @@ static void setup(void)
 		user_ns_supported = 0;
 	} else if (!access(MAX_USERNS, F_OK)) {
 		SAFE_FILE_SCANF(MAX_USERNS, "%d", &orig_max_userns);
-		SAFE_FILE_PRINTF(MAX_USERNS, "%d", 10);
+		SAFE_FILE_PRINTF(MAX_USERNS, "%d", orig_max_userns + 10);
 	}
 
 	/*
diff --git a/testcases/kernel/syscalls/getxattr/getxattr05.c b/testcases/kernel/syscalls/getxattr/getxattr05.c
index d9717a695..f1c8e8391 100644
--- a/testcases/kernel/syscalls/getxattr/getxattr05.c
+++ b/testcases/kernel/syscalls/getxattr/getxattr05.c
@@ -156,7 +156,7 @@ static void setup(void)
 		user_ns_supported = 0;
 	} else if (!access(MAX_USERNS, F_OK)) {
 		SAFE_FILE_SCANF(MAX_USERNS, "%d", &orig_max_userns);
-		SAFE_FILE_PRINTF(MAX_USERNS, "%d", 10);
+		SAFE_FILE_PRINTF(MAX_USERNS, "%d", orig_max_userns + 10);
 	}
 
 }
-- 
2.46.0