[RESEND][PATCH] userns: use macro instead of magic number for max userns level

From: Chen Hanxiao
Date: Fri Dec 12 2014 - 05:03:32 EST


Use macro instead of magic number
for max user namespace level.

Acked-by: Serge E. Hallyn <serge.hallyn@xxxxxxxxxx>

Signed-off-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
---
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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/