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: [PATCH 24/26] net/tcp: switch do_tcp_setsockopt to sockptr_t Date: Thu, 23 Jul 2020 08:09:06 +0200 Message-ID: <20200723060908.50081-25-hch@lst.de> (raw) In-Reply-To: <20200723060908.50081-1-hch@lst.de> Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> --- net/ipv4/tcp.c | 34 ++++++++++++++++------------------ 1 file changed, 16 insertions(+), 18 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 49bf15c27deac7..71cbc61c335f71 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2764,7 +2764,7 @@ static inline bool tcp_can_repair_sock(const struct sock *sk) (sk->sk_state != TCP_LISTEN); } -static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int len) +static int tcp_repair_set_window(struct tcp_sock *tp, sockptr_t optbuf, int len) { struct tcp_repair_window opt; @@ -2774,7 +2774,7 @@ static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int l if (len != sizeof(opt)) return -EINVAL; - if (copy_from_user(&opt, optbuf, sizeof(opt))) + if (copy_from_sockptr(&opt, optbuf, sizeof(opt))) return -EFAULT; if (opt.max_window < opt.snd_wnd) @@ -2796,17 +2796,17 @@ static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int l return 0; } -static int tcp_repair_options_est(struct sock *sk, - struct tcp_repair_opt __user *optbuf, unsigned int len) +static int tcp_repair_options_est(struct sock *sk, sockptr_t optbuf, + unsigned int len) { struct tcp_sock *tp = tcp_sk(sk); struct tcp_repair_opt opt; while (len >= sizeof(opt)) { - if (copy_from_user(&opt, optbuf, sizeof(opt))) + if (copy_from_sockptr(&opt, optbuf, sizeof(opt))) return -EFAULT; - optbuf++; + sockptr_advance(optbuf, sizeof(opt)); len -= sizeof(opt); switch (opt.opt_code) { @@ -3020,8 +3020,8 @@ EXPORT_SYMBOL(tcp_sock_set_keepcnt); /* * Socket option code for TCP. */ -static int do_tcp_setsockopt(struct sock *sk, int level, - int optname, char __user *optval, unsigned int optlen) +static int do_tcp_setsockopt(struct sock *sk, int level, int optname, + sockptr_t optval, unsigned int optlen) { struct tcp_sock *tp = tcp_sk(sk); struct inet_connection_sock *icsk = inet_csk(sk); @@ -3037,7 +3037,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, if (optlen < 1) return -EINVAL; - val = strncpy_from_user(name, optval, + val = strncpy_from_sockptr(name, optval, min_t(long, TCP_CA_NAME_MAX-1, optlen)); if (val < 0) return -EFAULT; @@ -3056,7 +3056,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, if (optlen < 1) return -EINVAL; - val = strncpy_from_user(name, optval, + val = strncpy_from_sockptr(name, optval, min_t(long, TCP_ULP_NAME_MAX - 1, optlen)); if (val < 0) @@ -3079,7 +3079,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, optlen != TCP_FASTOPEN_KEY_BUF_LENGTH) return -EINVAL; - if (copy_from_user(key, optval, optlen)) + if (copy_from_sockptr(key, optval, optlen)) return -EFAULT; if (optlen == TCP_FASTOPEN_KEY_BUF_LENGTH) @@ -3095,7 +3095,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, if (optlen < sizeof(int)) return -EINVAL; - if (get_user(val, (int __user *)optval)) + if (copy_from_sockptr(&val, optval, sizeof(val))) return -EFAULT; lock_sock(sk); @@ -3174,9 +3174,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, if (!tp->repair) err = -EINVAL; else if (sk->sk_state == TCP_ESTABLISHED) - err = tcp_repair_options_est(sk, - (struct tcp_repair_opt __user *)optval, - optlen); + err = tcp_repair_options_est(sk, optval, optlen); else err = -EPERM; break; @@ -3249,8 +3247,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, #ifdef CONFIG_TCP_MD5SIG case TCP_MD5SIG: case TCP_MD5SIG_EXT: - err = tp->af_specific->md5_parse(sk, optname, - USER_SOCKPTR(optval), optlen); + err = tp->af_specific->md5_parse(sk, optname, optval, optlen); break; #endif case TCP_USER_TIMEOUT: @@ -3334,7 +3331,8 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval, if (level != SOL_TCP) return icsk->icsk_af_ops->setsockopt(sk, level, optname, optval, optlen); - return do_tcp_setsockopt(sk, level, optname, optval, optlen); + return do_tcp_setsockopt(sk, level, optname, USER_SOCKPTR(optval), + optlen); } EXPORT_SYMBOL(tcp_setsockopt); -- 2.27.0
next prev parent reply index Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-23 6:08 get rid of the address_space override in setsockopt v2 Christoph Hellwig 2020-07-23 6:08 ` [PATCH 01/26] bpfilter: fix up a sparse annotation Christoph Hellwig 2020-07-23 11:14 ` Luc Van Oostenryck 2020-07-23 6:08 ` [PATCH 02/26] net/bpfilter: split __bpfilter_process_sockopt Christoph Hellwig 2020-07-23 6:08 ` [PATCH 03/26] bpfilter: reject kernel addresses Christoph Hellwig 2020-07-23 14:42 ` David Laight 2020-07-23 14:44 ` 'Christoph Hellwig' 2020-07-23 14:56 ` David Laight 2020-07-23 6:08 ` [PATCH 04/26] net: add a new sockptr_t type Christoph Hellwig 2020-07-23 15:40 ` Jan Engelhardt 2020-07-23 16:40 ` Eric Dumazet 2020-07-23 16:44 ` Christoph Hellwig 2020-07-23 6:08 ` [PATCH 05/26] net: switch copy_bpf_fprog_from_user to sockptr_t Christoph Hellwig 2020-07-23 6:08 ` [PATCH 06/26] net: switch sock_setbindtodevice " Christoph Hellwig 2020-07-23 6:08 ` [PATCH 07/26] net: switch sock_set_timeout " Christoph Hellwig 2020-07-23 6:08 ` [PATCH 08/26] " Christoph Hellwig 2020-07-23 8:39 ` [MPTCP] " Matthieu Baerts 2020-07-23 6:08 ` [PATCH 09/26] net/xfrm: switch xfrm_user_policy " Christoph Hellwig 2020-07-23 6:08 ` [PATCH 10/26] netfilter: remove the unused user argument to do_update_counters Christoph Hellwig 2020-07-23 6:08 ` [PATCH 11/26] netfilter: switch xt_copy_counters to sockptr_t Christoph Hellwig 2020-07-23 6:08 ` [PATCH 12/26] netfilter: switch nf_setsockopt " Christoph Hellwig 2020-07-27 15:03 ` Jason A. Donenfeld 2020-07-27 15:06 ` Christoph Hellwig 2020-07-27 16:16 ` Jason A. Donenfeld 2020-07-27 16:23 ` Christoph Hellwig 2020-07-28 8:07 ` David Laight 2020-07-28 8:17 ` Jason A. Donenfeld 2020-07-27 16:16 ` Christoph Hellwig 2020-07-27 16:21 ` Jason A. Donenfeld 2020-07-23 6:08 ` [PATCH 13/26] bpfilter: switch bpfilter_ip_set_sockopt " Christoph Hellwig 2020-07-23 11:16 ` David Laight 2020-07-23 11:44 ` 'Christoph Hellwig' 2020-07-23 6:08 ` [PATCH 14/26] net/ipv4: switch ip_mroute_setsockopt " Christoph Hellwig 2020-07-23 6:08 ` [PATCH 15/26] net/ipv4: merge ip_options_get and ip_options_get_from_user Christoph Hellwig 2020-07-23 6:08 ` [PATCH 16/26] net/ipv4: switch do_ip_setsockopt to sockptr_t Christoph Hellwig 2020-07-23 6:08 ` [PATCH 17/26] net/ipv6: switch ip6_mroute_setsockopt " Christoph Hellwig 2020-07-23 6:09 ` [PATCH 18/26] net/ipv6: split up ipv6_flowlabel_opt Christoph Hellwig 2020-07-23 6:09 ` [PATCH 19/26] net/ipv6: switch ipv6_flowlabel_opt to sockptr_t Christoph Hellwig 2020-07-27 12:15 ` Ido Schimmel 2020-07-27 13:00 ` Christoph Hellwig 2020-07-27 13:33 ` Ido Schimmel 2020-07-27 16:15 ` Christoph Hellwig 2020-07-27 18:22 ` Ido Schimmel 2020-07-27 13:24 ` David Laight 2020-07-23 6:09 ` [PATCH 20/26] net/ipv6: factor out a ipv6_set_opt_hdr helper Christoph Hellwig 2020-07-23 6:09 ` [PATCH 21/26] net/ipv6: switch do_ipv6_setsockopt to sockptr_t Christoph Hellwig 2020-07-23 6:09 ` [PATCH 22/26] net/udp: switch udp_lib_setsockopt " Christoph Hellwig 2020-07-23 6:09 ` [PATCH 23/26] net/tcp: switch ->md5_parse " Christoph Hellwig 2020-07-23 6:09 ` Christoph Hellwig [this message] 2020-07-23 6:09 ` [PATCH 25/26] net: pass a sockptr_t into ->setsockopt Christoph Hellwig 2020-07-23 8:39 ` [MPTCP] " Matthieu Baerts 2020-08-06 22:21 ` Eric Dumazet 2020-08-07 7:21 ` Christoph Hellwig 2020-08-07 9:18 ` David Laight 2020-08-07 18:29 ` Eric Dumazet 2020-08-08 13:54 ` David Laight 2020-07-23 6:09 ` [PATCH 26/26] net: optimize the sockptr_t for unified kernel/user address spaces Christoph Hellwig 2020-07-24 22:43 ` get rid of the address_space override in setsockopt v2 David Miller 2020-07-26 7:03 ` Christoph Hellwig 2020-07-26 7:08 ` Andreas Schwab 2020-07-26 7:46 ` David Miller 2020-07-27 9:51 ` David Laight 2020-07-27 13:48 ` Al Viro 2020-07-27 14:09 ` David Laight
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