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From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
	Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
	Eric Dumazet <edumazet@google.com>
Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, bpf@vger.kernel.org,
	netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
	linux-sctp@vger.kernel.org, linux-hams@vger.kernel.org,
	linux-bluetooth@vger.kernel.org,
	bridge@lists.linux-foundation.org, linux-can@vger.kernel.org,
	dccp@vger.kernel.org, linux-decnet-user@lists.sourceforge.net,
	linux-wpan@vger.kernel.org, linux-s390@vger.kernel.org,
	mptcp@lists.01.org, lvs-devel@vger.kernel.org,
	rds-devel@oss.oracle.com, linux-afs@lists.infradead.org,
	tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org
Subject: get rid of the address_space override in setsockopt
Date: Mon, 20 Jul 2020 14:47:13 +0200
Message-ID: <20200720124737.118617-1-hch@lst.de> (raw)

Hi Dave,

setsockopt is the last place in architecture-independ code that still
uses set_fs to force the uaccess routines to operate on kernel pointers.

This series adds a new sockptr_t type that can contained either a kernel
or user pointer, and which has accessors that do the right thing, and
then uses it for setsockopt, starting by refactoring some low-level
helpers and moving them over to it before finally doing the main
setsockopt method.

Note that I could not get the eBPF selftests to work, so this has been
tested with a testing patch that always copies the data first and passes
a kernel pointer.  This is something that works for most common sockopts
(and is something that the ePBF support relies on), but unfortunately
in various corner cases we either don't use the passed in length, or in
one case actually copy data back from setsockopt, so we unfortunately
can't just always do the copy in the highlevel code, which would have
been much nicer.


Diffstt:
 crypto/af_alg.c                           |    7 
 drivers/crypto/chelsio/chtls/chtls_main.c |   18 -
 drivers/isdn/mISDN/socket.c               |    4 
 include/linux/bpfilter.h                  |    6 
 include/linux/filter.h                    |    3 
 include/linux/mroute.h                    |    5 
 include/linux/mroute6.h                   |    8 
 include/linux/net.h                       |    4 
 include/linux/netfilter.h                 |    6 
 include/linux/netfilter/x_tables.h        |    4 
 include/linux/sockptr.h                   |  121 +++++++++++
 include/net/inet_connection_sock.h        |    3 
 include/net/ip.h                          |    7 
 include/net/ipv6.h                        |    6 
 include/net/sctp/structs.h                |    2 
 include/net/sock.h                        |    7 
 include/net/tcp.h                         |    6 
 include/net/udp.h                         |    2 
 include/net/xfrm.h                        |    8 
 net/atm/common.c                          |    6 
 net/atm/common.h                          |    2 
 net/atm/pvc.c                             |    2 
 net/atm/svc.c                             |    6 
 net/ax25/af_ax25.c                        |    6 
 net/bluetooth/hci_sock.c                  |    8 
 net/bluetooth/l2cap_sock.c                |   22 +-
 net/bluetooth/rfcomm/sock.c               |   12 -
 net/bluetooth/sco.c                       |    6 
 net/bpfilter/bpfilter_kern.c              |   11 -
 net/bridge/netfilter/ebtables.c           |   46 +---
 net/caif/caif_socket.c                    |    8 
 net/can/j1939/socket.c                    |   12 -
 net/can/raw.c                             |   16 -
 net/core/filter.c                         |    6 
 net/core/sock.c                           |   36 +--
 net/dccp/dccp.h                           |    2 
 net/dccp/proto.c                          |   20 -
 net/decnet/af_decnet.c                    |   13 -
 net/ieee802154/socket.c                   |    6 
 net/ipv4/bpfilter/sockopt.c               |    8 
 net/ipv4/ip_options.c                     |   43 +---
 net/ipv4/ip_sockglue.c                    |   66 +++---
 net/ipv4/ipmr.c                           |   14 -
 net/ipv4/netfilter/arp_tables.c           |   33 +--
 net/ipv4/netfilter/ip_tables.c            |   29 +-
 net/ipv4/raw.c                            |    8 
 net/ipv4/tcp.c                            |   30 +-
 net/ipv4/tcp_ipv4.c                       |    4 
 net/ipv4/udp.c                            |   11 -
 net/ipv4/udp_impl.h                       |    4 
 net/ipv6/ip6_flowlabel.c                  |  317 ++++++++++++++++--------------
 net/ipv6/ip6mr.c                          |   17 -
 net/ipv6/ipv6_sockglue.c                  |  203 +++++++++----------
 net/ipv6/netfilter/ip6_tables.c           |   28 +-
 net/ipv6/raw.c                            |   10 
 net/ipv6/tcp_ipv6.c                       |    4 
 net/ipv6/udp.c                            |    7 
 net/ipv6/udp_impl.h                       |    4 
 net/iucv/af_iucv.c                        |    4 
 net/kcm/kcmsock.c                         |    6 
 net/l2tp/l2tp_ppp.c                       |    4 
 net/llc/af_llc.c                          |    4 
 net/mptcp/protocol.c                      |   12 -
 net/netfilter/ipvs/ip_vs_ctl.c            |    4 
 net/netfilter/nf_sockopt.c                |    2 
 net/netfilter/x_tables.c                  |   20 -
 net/netlink/af_netlink.c                  |    4 
 net/netrom/af_netrom.c                    |    4 
 net/nfc/llcp_sock.c                       |    6 
 net/packet/af_packet.c                    |   39 +--
 net/phonet/pep.c                          |    4 
 net/rds/af_rds.c                          |   30 +-
 net/rds/rdma.c                            |   14 -
 net/rds/rds.h                             |    6 
 net/rose/af_rose.c                        |    4 
 net/rxrpc/af_rxrpc.c                      |    8 
 net/rxrpc/ar-internal.h                   |    4 
 net/rxrpc/key.c                           |    9 
 net/sctp/socket.c                         |    4 
 net/smc/af_smc.c                          |    4 
 net/socket.c                              |   20 -
 net/tipc/socket.c                         |    8 
 net/tls/tls_main.c                        |   17 -
 net/vmw_vsock/af_vsock.c                  |    4 
 net/x25/af_x25.c                          |    4 
 net/xdp/xsk.c                             |    8 
 net/xfrm/xfrm_state.c                     |    6 
 87 files changed, 855 insertions(+), 721 deletions(-)

             reply index

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-20 12:47 Christoph Hellwig [this message]
2020-07-20 12:47 ` [PATCH 01/24] bpfilter: reject kernel addresses Christoph Hellwig
2020-07-20 12:47 ` [PATCH 02/24] bpfilter: fix up a sparse annotation Christoph Hellwig
2020-07-21  2:40   ` Luc Van Oostenryck
2020-07-21  5:23     ` Christoph Hellwig
2020-07-21  5:28       ` Al Viro
2020-07-20 12:47 ` [PATCH 03/24] net: add a new sockptr_t type Christoph Hellwig
2020-07-20 16:37   ` Eric Biggers
2020-07-20 17:43     ` Christoph Hellwig
2020-07-20 17:55       ` Eric Biggers
2020-07-22  7:56         ` Christoph Hellwig
2020-07-21  9:55     ` David Laight
2020-07-21 10:14   ` David Laight
2020-07-20 12:47 ` [PATCH 04/24] net: switch copy_bpf_fprog_from_user to sockptr_t Christoph Hellwig
2020-07-20 12:47 ` [PATCH 05/24] net: switch sock_setbindtodevice " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 06/24] net: switch sock_set_timeout " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 07/24] " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 08/24] net/xfrm: switch xfrm_user_policy " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 09/24] netfilter: remove the unused user argument to do_update_counters Christoph Hellwig
2020-07-20 12:47 ` [PATCH 10/24] netfilter: switch xt_copy_counters to sockptr_t Christoph Hellwig
2020-07-20 12:47 ` [PATCH 11/24] netfilter: switch nf_setsockopt " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 12/24] bpfilter: switch bpfilter_ip_set_sockopt " Christoph Hellwig
2020-07-21  8:36   ` David Laight
2020-07-22  8:00     ` 'Christoph Hellwig'
2020-07-22  8:01       ` 'Christoph Hellwig'
2020-07-20 12:47 ` [PATCH 13/24] net/ipv4: switch ip_mroute_setsockopt " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 14/24] net/ipv4: merge ip_options_get and ip_options_get_from_user Christoph Hellwig
2020-07-20 12:47 ` [PATCH 15/24] net/ipv4: switch do_ip_setsockopt to sockptr_t Christoph Hellwig
2020-07-20 12:47 ` [PATCH 16/24] net/ipv6: switch ip6_mroute_setsockopt " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 17/24] net/ipv6: split up ipv6_flowlabel_opt Christoph Hellwig
2020-07-20 12:47 ` [PATCH 18/24] net/ipv6: switch ipv6_flowlabel_opt to sockptr_t Christoph Hellwig
2020-07-20 12:47 ` [PATCH 19/24] net/ipv6: factor out a ipv6_set_opt_hdr helper Christoph Hellwig
2020-07-20 12:47 ` [PATCH 20/24] net/ipv6: switch do_ipv6_setsockopt to sockptr_t Christoph Hellwig
2020-07-20 12:47 ` [PATCH 21/24] net/udp: switch udp_lib_setsockopt " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 22/24] net/tcp: switch ->md5_parse " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 23/24] net/tcp: switch do_tcp_setsockopt " Christoph Hellwig
2020-07-20 12:47 ` [PATCH 24/24] net: pass a sockptr_t into ->setsockopt Christoph Hellwig
2020-07-20 14:19   ` Stefan Schmidt
2020-07-20 23:20     ` David Miller
2020-07-22  8:26   ` [MPTCP] " Matthieu Baerts
2020-07-20 16:38 ` get rid of the address_space override in setsockopt Eric Biggers
2020-07-20 17:43   ` Christoph Hellwig
2020-07-20 20:47 ` Alexei Starovoitov
2020-07-22  7:56   ` Christoph Hellwig
2020-07-22 17:09     ` Alexei Starovoitov
2020-07-21  9:38 ` David Laight
2020-07-22  8:06   ` 'Christoph Hellwig'
2020-07-22  8:21     ` David Laight
2020-07-21 10:26 ` David Laight
2020-07-22  8:07   ` 'Christoph Hellwig'

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