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path: root/net/core/scm.c
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Diffstat (limited to 'net/core/scm.c')
-rw-r--r--net/core/scm.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/core/scm.c b/net/core/scm.c
index b88f6f9d0b97..681c976307b5 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -170,6 +170,30 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
err = scm_check_creds(&p->creds);
if (err)
goto error;
+
+ if (pid_vnr(p->pid) != p->creds.pid) {
+ struct pid *pid;
+ err = -ESRCH;
+ pid = find_get_pid(p->creds.pid);
+ if (!pid)
+ goto error;
+ put_pid(p->pid);
+ p->pid = pid;
+ }
+
+ if ((p->cred->euid != p->creds.uid) ||
+ (p->cred->egid != p->creds.gid)) {
+ struct cred *cred;
+ err = -ENOMEM;
+ cred = prepare_creds();
+ if (!cred)
+ goto error;
+
+ cred->uid = cred->euid = p->creds.uid;
+ cred->gid = cred->egid = p->creds.uid;
+ put_cred(p->cred);
+ p->cred = cred;
+ }
break;
default:
goto error;