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-rw-r--r--net/core/sock.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index f9ce0db..db8335a 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -110,6 +110,7 @@
#include <linux/tcp.h>
#include <linux/init.h>
#include <linux/highmem.h>
+#include <linux/user_namespace.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -749,6 +750,19 @@ set_rcvbuf:
EXPORT_SYMBOL(sock_setsockopt);
+void cred_to_ucred(struct pid *pid, const struct cred *cred,
+ struct ucred *ucred)
+{
+ ucred->pid = pid_vnr(pid);
+ ucred->uid = ucred->gid = -1;
+ if (cred) {
+ struct user_namespace *current_ns = current_user_ns();
+
+ ucred->uid = user_ns_map_uid(current_ns, cred, cred->euid);
+ ucred->gid = user_ns_map_gid(current_ns, cred, cred->egid);
+ }
+}
+
int sock_getsockopt(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen)
{