diff options
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index b714162213ae..fd85e651ce28 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1152,23 +1152,31 @@ set_rcvbuf: break; case SO_TXTIME: - if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) { - ret = -EPERM; - } else if (optlen != sizeof(struct sock_txtime)) { + if (optlen != sizeof(struct sock_txtime)) { ret = -EINVAL; + break; } else if (copy_from_user(&sk_txtime, optval, sizeof(struct sock_txtime))) { ret = -EFAULT; + break; } else if (sk_txtime.flags & ~SOF_TXTIME_FLAGS_MASK) { ret = -EINVAL; - } else { - sock_valbool_flag(sk, SOCK_TXTIME, true); - sk->sk_clockid = sk_txtime.clockid; - sk->sk_txtime_deadline_mode = - !!(sk_txtime.flags & SOF_TXTIME_DEADLINE_MODE); - sk->sk_txtime_report_errors = - !!(sk_txtime.flags & SOF_TXTIME_REPORT_ERRORS); + break; + } + /* CLOCK_MONOTONIC is only used by sch_fq, and this packet + * scheduler has enough safe guards. + */ + if (sk_txtime.clockid != CLOCK_MONOTONIC && + !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) { + ret = -EPERM; + break; } + sock_valbool_flag(sk, SOCK_TXTIME, true); + sk->sk_clockid = sk_txtime.clockid; + sk->sk_txtime_deadline_mode = + !!(sk_txtime.flags & SOF_TXTIME_DEADLINE_MODE); + sk->sk_txtime_report_errors = + !!(sk_txtime.flags & SOF_TXTIME_REPORT_ERRORS); break; case SO_BINDTOIFINDEX: |