net: socket: fix SIOCGIFNAME in compat

[ Upstream commit c6c9fee35dc27362b7bac34b2fc9f5b8ace2e22c ]

As reported by Robert O'Callahan in
https://bugzilla.kernel.org/show_bug.cgi?id=202273
reverting the previous changes in this area broke
the SIOCGIFNAME ioctl in compat again (I'd previously
fixed it after his previous report of breakage in
https://bugzilla.kernel.org/show_bug.cgi?id=199469).

This is obviously because I fixed SIOCGIFNAME more or
less by accident.

Fix it explicitly now by making it pass through the
restored compat translation code.

Cc: stable@vger.kernel.org
Fixes: 4cf808e7ac32 ("kill dev_ifname32()")
Reported-by: Robert O'Callahan <robert@ocallahan.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/socket.c b/net/socket.c
index e74ede5..3b954ca 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -3001,6 +3001,7 @@ static int compat_ifreq_ioctl(struct net *net, struct socket *sock,
                case SIOCGIFTXQLEN:
                case SIOCGMIIPHY:
                case SIOCGMIIREG:
+               case SIOCGIFNAME:
                        if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
                                err = -EFAULT;
                        break;
@@ -3224,6 +3225,7 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
        case SIOCSIFTXQLEN:
        case SIOCBRADDIF:
        case SIOCBRDELIF:
+       case SIOCGIFNAME:
        case SIOCSIFNAME:
        case SIOCGMIIPHY:
        case SIOCGMIIREG:
@@ -3238,7 +3240,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
        case SIOCBONDRELEASE:
        case SIOCBONDSETHWADDR:
        case SIOCBONDCHANGEACTIVE:
-       case SIOCGIFNAME:
                return sock_do_ioctl(net, sock, cmd, arg);
        }