Linux-Crypto Archive on lore.kernel.org
 help / color / Atom feed
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 21/26] net/ipv6: switch do_ipv6_setsockopt to sockptr_t
Date: Thu, 23 Jul 2020 08:09:03 +0200
Message-ID: <20200723060908.50081-22-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/ipv6/ipv6_sockglue.c | 66 ++++++++++++++++++++--------------------
 1 file changed, 33 insertions(+), 33 deletions(-)

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 90442c8366dff2..dcd000a5a9b124 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -136,15 +136,15 @@ static bool setsockopt_needs_rtnl(int optname)
 	return false;
 }
 
-static int copy_group_source_from_user(struct group_source_req *greqs,
-		void __user *optval, int optlen)
+static int copy_group_source_from_sockptr(struct group_source_req *greqs,
+		sockptr_t optval, int optlen)
 {
 	if (in_compat_syscall()) {
 		struct compat_group_source_req gr32;
 
 		if (optlen < sizeof(gr32))
 			return -EINVAL;
-		if (copy_from_user(&gr32, optval, sizeof(gr32)))
+		if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))
 			return -EFAULT;
 		greqs->gsr_interface = gr32.gsr_interface;
 		greqs->gsr_group = gr32.gsr_group;
@@ -152,7 +152,7 @@ static int copy_group_source_from_user(struct group_source_req *greqs,
 	} else {
 		if (optlen < sizeof(*greqs))
 			return -EINVAL;
-		if (copy_from_user(greqs, optval, sizeof(*greqs)))
+		if (copy_from_sockptr(greqs, optval, sizeof(*greqs)))
 			return -EFAULT;
 	}
 
@@ -160,13 +160,13 @@ static int copy_group_source_from_user(struct group_source_req *greqs,
 }
 
 static int do_ipv6_mcast_group_source(struct sock *sk, int optname,
-		void __user *optval, int optlen)
+		sockptr_t optval, int optlen)
 {
 	struct group_source_req greqs;
 	int omode, add;
 	int ret;
 
-	ret = copy_group_source_from_user(&greqs, optval, optlen);
+	ret = copy_group_source_from_sockptr(&greqs, optval, optlen);
 	if (ret)
 		return ret;
 
@@ -200,7 +200,7 @@ static int do_ipv6_mcast_group_source(struct sock *sk, int optname,
 	return ip6_mc_source(add, omode, sk, &greqs);
 }
 
-static int ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
+static int ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
 		int optlen)
 {
 	struct group_filter *gsf;
@@ -211,7 +211,7 @@ static int ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
 	if (optlen > sysctl_optmem_max)
 		return -ENOBUFS;
 
-	gsf = memdup_user(optval, optlen);
+	gsf = memdup_sockptr(optval, optlen);
 	if (IS_ERR(gsf))
 		return PTR_ERR(gsf);
 
@@ -231,7 +231,7 @@ static int ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
 	return ret;
 }
 
-static int compat_ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
+static int compat_ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
 		int optlen)
 {
 	const int size0 = offsetof(struct compat_group_filter, gf_slist);
@@ -251,7 +251,7 @@ static int compat_ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
 
 	gf32 = p + 4; /* we want ->gf_group and ->gf_slist aligned */
 	ret = -EFAULT;
-	if (copy_from_user(gf32, optval, optlen))
+	if (copy_from_sockptr(gf32, optval, optlen))
 		goto out_free_p;
 
 	/* numsrc >= (4G-140)/128 overflow in 32 bits */
@@ -276,14 +276,14 @@ static int compat_ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,
 }
 
 static int ipv6_mcast_join_leave(struct sock *sk, int optname,
-		void __user *optval, int optlen)
+		sockptr_t optval, int optlen)
 {
 	struct sockaddr_in6 *psin6;
 	struct group_req greq;
 
 	if (optlen < sizeof(greq))
 		return -EINVAL;
-	if (copy_from_user(&greq, optval, sizeof(greq)))
+	if (copy_from_sockptr(&greq, optval, sizeof(greq)))
 		return -EFAULT;
 
 	if (greq.gr_group.ss_family != AF_INET6)
@@ -296,14 +296,14 @@ static int ipv6_mcast_join_leave(struct sock *sk, int optname,
 }
 
 static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname,
-		void __user *optval, int optlen)
+		sockptr_t optval, int optlen)
 {
 	struct compat_group_req gr32;
 	struct sockaddr_in6 *psin6;
 
 	if (optlen < sizeof(gr32))
 		return -EINVAL;
-	if (copy_from_user(&gr32, optval, sizeof(gr32)))
+	if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))
 		return -EFAULT;
 
 	if (gr32.gr_group.ss_family != AF_INET6)
@@ -315,7 +315,7 @@ static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname,
 	return ipv6_sock_mc_drop(sk, gr32.gr_interface, &psin6->sin6_addr);
 }
 
-static int ipv6_set_opt_hdr(struct sock *sk, int optname, void __user *optval,
+static int ipv6_set_opt_hdr(struct sock *sk, int optname, sockptr_t optval,
 		int optlen)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
@@ -332,14 +332,14 @@ static int ipv6_set_opt_hdr(struct sock *sk, int optname, void __user *optval,
 	 * length, per RFC3542.
 	 */
 	if (optlen > 0) {
-		if (!optval)
+		if (sockptr_is_null(optval))
 			return -EINVAL;
 		if (optlen < sizeof(struct ipv6_opt_hdr) ||
 		    optlen & 0x7 ||
 		    optlen > 8 * 255)
 			return -EINVAL;
 
-		new = memdup_user(optval, optlen);
+		new = memdup_sockptr(optval, optlen);
 		if (IS_ERR(new))
 			return PTR_ERR(new);
 		if (unlikely(ipv6_optlen(new) > optlen)) {
@@ -390,7 +390,7 @@ static int ipv6_set_opt_hdr(struct sock *sk, int optname, void __user *optval,
 }
 
 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, unsigned int optlen)
+		   sockptr_t optval, unsigned int optlen)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net *net = sock_net(sk);
@@ -398,11 +398,11 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	int retv = -ENOPROTOOPT;
 	bool needs_rtnl = setsockopt_needs_rtnl(optname);
 
-	if (!optval)
+	if (sockptr_is_null(optval))
 		val = 0;
 	else {
 		if (optlen >= sizeof(int)) {
-			if (get_user(val, (int __user *) optval))
+			if (copy_from_sockptr(&val, optval, sizeof(val)))
 				return -EFAULT;
 		} else
 			val = 0;
@@ -411,8 +411,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	valbool = (val != 0);
 
 	if (ip6_mroute_opt(optname))
-		return ip6_mroute_setsockopt(sk, optname, USER_SOCKPTR(optval),
-					     optlen);
+		return ip6_mroute_setsockopt(sk, optname, optval, optlen);
 
 	if (needs_rtnl)
 		rtnl_lock();
@@ -663,12 +662,13 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 
 		if (optlen == 0)
 			goto e_inval;
-		else if (optlen < sizeof(struct in6_pktinfo) || !optval)
+		else if (optlen < sizeof(struct in6_pktinfo) ||
+			 sockptr_is_null(optval))
 			goto e_inval;
 
-		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
-				retv = -EFAULT;
-				break;
+		if (copy_from_sockptr(&pkt, optval, sizeof(pkt))) {
+			retv = -EFAULT;
+			break;
 		}
 		if (!sk_dev_equal_l3scope(sk, pkt.ipi6_ifindex))
 			goto e_inval;
@@ -709,7 +709,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		refcount_set(&opt->refcnt, 1);
 		opt->tot_len = sizeof(*opt) + optlen;
 		retv = -EFAULT;
-		if (copy_from_user(opt+1, optval, optlen))
+		if (copy_from_sockptr(opt + 1, optval, optlen))
 			goto done;
 
 		msg.msg_controllen = optlen;
@@ -831,7 +831,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			break;
 
 		retv = -EFAULT;
-		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))
 			break;
 
 		if (optname == IPV6_ADD_MEMBERSHIP)
@@ -849,7 +849,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			goto e_inval;
 
 		retv = -EFAULT;
-		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))
 			break;
 
 		if (optname == IPV6_JOIN_ANYCAST)
@@ -929,15 +929,14 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		retv = 0;
 		break;
 	case IPV6_FLOWLABEL_MGR:
-		retv = ipv6_flowlabel_opt(sk, USER_SOCKPTR(optval), optlen);
+		retv = ipv6_flowlabel_opt(sk, optval, optlen);
 		break;
 	case IPV6_IPSEC_POLICY:
 	case IPV6_XFRM_POLICY:
 		retv = -EPERM;
 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 			break;
-		retv = xfrm_user_policy(sk, optname, USER_SOCKPTR(optval),
-					optlen);
+		retv = xfrm_user_policy(sk, optname, optval, optlen);
 		break;
 
 	case IPV6_ADDR_PREFERENCES:
@@ -992,7 +991,8 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
 	if (level != SOL_IPV6)
 		return -ENOPROTOOPT;
 
-	err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
+	err = do_ipv6_setsockopt(sk, level, optname, USER_SOCKPTR(optval),
+				 optlen);
 #ifdef CONFIG_NETFILTER
 	/* we need to exclude all possible ENOPROTOOPTs except default case */
 	if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
-- 
2.27.0


  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 ` Christoph Hellwig [this message]
2020-07-23  6:09 ` [PATCH 22/26] net/udp: switch udp_lib_setsockopt to sockptr_t Christoph Hellwig
2020-07-23  6:09 ` [PATCH 23/26] net/tcp: switch ->md5_parse " Christoph Hellwig
2020-07-23  6:09 ` [PATCH 24/26] net/tcp: switch do_tcp_setsockopt " Christoph Hellwig
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200723060908.50081-22-hch@lst.de \
    --to=hch@lst.de \
    --cc=ast@kernel.org \
    --cc=bpf@vger.kernel.org \
    --cc=bridge@lists.linux-foundation.org \
    --cc=coreteam@netfilter.org \
    --cc=daniel@iogearbox.net \
    --cc=davem@davemloft.net \
    --cc=dccp@vger.kernel.org \
    --cc=edumazet@google.com \
    --cc=kuba@kernel.org \
    --cc=kuznet@ms2.inr.ac.ru \
    --cc=linux-afs@lists.infradead.org \
    --cc=linux-bluetooth@vger.kernel.org \
    --cc=linux-can@vger.kernel.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-decnet-user@lists.sourceforge.net \
    --cc=linux-hams@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-s390@vger.kernel.org \
    --cc=linux-sctp@vger.kernel.org \
    --cc=linux-wpan@vger.kernel.org \
    --cc=linux-x25@vger.kernel.org \
    --cc=lvs-devel@vger.kernel.org \
    --cc=mptcp@lists.01.org \
    --cc=netdev@vger.kernel.org \
    --cc=netfilter-devel@vger.kernel.org \
    --cc=rds-devel@oss.oracle.com \
    --cc=tipc-discussion@lists.sourceforge.net \
    --cc=yoshfuji@linux-ipv6.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Crypto Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-crypto/0 linux-crypto/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-crypto linux-crypto/ https://lore.kernel.org/linux-crypto \
		linux-crypto@vger.kernel.org
	public-inbox-index linux-crypto

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-crypto


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git