Use macro instead of magic number
for max user namespace level.
Acked-by: Serge E. Hallyn <serge.hal...@ubuntu.com>
Signed-off-by: Chen Hanxiao <chenhanx...@cn.fujitsu.com>
---
kernel/user_namespace.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index aa312b0..5435489 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -47,6 +47,8 @@ static void set_cred_user_ns(struct cred *cred, struct
user_namespace *user_ns)
cred->user_ns = user_ns;
}
+#define MAX_USER_NS_LEVEL 32
+
/*
* Create a new user namespace, deriving the creator from the user in the
* passed credentials, and replacing that user with the new root user for the
@@ -62,7 +64,7 @@ int create_user_ns(struct cred *new)
kgid_t group = new->egid;
int ret;
- if (parent_ns->level > 32)
+ if (parent_ns->level > MAX_USER_NS_LEVEL)
return -EUSERS;
/*
--
1.9.3
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