diff options
Diffstat (limited to 'net/core/scm.c')
| -rw-r--r-- | net/core/scm.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/net/core/scm.c b/net/core/scm.c index 6ab491d6c26f..9c1c63da3ca8 100644 --- a/net/core/scm.c +++ b/net/core/scm.c @@ -155,19 +155,21 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p) break; case SCM_CREDENTIALS: { + struct ucred creds; kuid_t uid; kgid_t gid; if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct ucred))) goto error; - memcpy(&p->creds, CMSG_DATA(cmsg), sizeof(struct ucred)); - err = scm_check_creds(&p->creds); + memcpy(&creds, CMSG_DATA(cmsg), sizeof(struct ucred)); + err = scm_check_creds(&creds); if (err) goto error; - if (!p->pid || pid_vnr(p->pid) != p->creds.pid) { + p->creds.pid = creds.pid; + if (!p->pid || pid_vnr(p->pid) != creds.pid) { struct pid *pid; err = -ESRCH; - pid = find_get_pid(p->creds.pid); + pid = find_get_pid(creds.pid); if (!pid) goto error; put_pid(p->pid); @@ -175,11 +177,14 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p) } err = -EINVAL; - uid = make_kuid(current_user_ns(), p->creds.uid); - gid = make_kgid(current_user_ns(), p->creds.gid); + uid = make_kuid(current_user_ns(), creds.uid); + gid = make_kgid(current_user_ns(), creds.gid); if (!uid_valid(uid) || !gid_valid(gid)) goto error; + p->creds.uid = uid; + p->creds.gid = gid; + if (!p->cred || !uid_eq(p->cred->euid, uid) || !gid_eq(p->cred->egid, gid)) { |