From ec1b4cf74c81bfd0fbe5bf62bafc86c45917e72f Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 5 Oct 2009 05:58:39 +0000 Subject: net: mark net_proto_ops as const All usages of structure net_proto_ops should be declared const. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/x25/af_x25.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 7fa9c7a..ebbfe6b 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1476,7 +1476,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) return rc; } -static struct net_proto_family x25_family_ops = { +static const struct net_proto_family x25_family_ops = { .family = AF_X25, .create = x25_create, .owner = THIS_MODULE, -- cgit v1.1 From 06a96b33aea838b61a6eeccded781a305cf85a12 Mon Sep 17 00:00:00 2001 From: roel kluin Date: Wed, 7 Oct 2009 00:59:42 +0000 Subject: x25: bit and/or confusion in x25_ioctl()? Looking at commit ebc3f64b864f it appears that this was intended and not the original, equivalent to `if (facilities.reverse & ~0x81)'. In x25_parse_facilities() that patch changed how facilities->reverse was set. No other bits were set than 0x80 and/or 0x01. Signed-off-by: Roel Kluin Signed-off-by: David S. Miller --- net/x25/af_x25.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index ebbfe6b..e19d811 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1363,7 +1363,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) facilities.throughput > 0xDD) break; if (facilities.reverse && - (facilities.reverse | 0x81)!= 0x81) + (facilities.reverse & 0x81) != 0x81) break; x25->facilities = facilities; rc = 0; -- cgit v1.1 From 091bb8ab51c668635d1a75359019005921676881 Mon Sep 17 00:00:00 2001 From: roel kluin Date: Fri, 23 Oct 2009 05:21:56 +0000 Subject: net: Cleanup redundant tests on unsigned If there is data, the unsigned skb->len is greater than 0. rt.sigdigits is unsigned as well, so the test `>= 0' is always true, the other part of the test catches wrapped values. Signed-off-by: Roel Kluin Signed-off-by: David S. Miller --- net/x25/x25_in.c | 2 +- net/x25/x25_route.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'net/x25') diff --git a/net/x25/x25_in.c b/net/x25/x25_in.c index 7d7c3ab..96d9227 100644 --- a/net/x25/x25_in.c +++ b/net/x25/x25_in.c @@ -114,7 +114,7 @@ static int x25_state1_machine(struct sock *sk, struct sk_buff *skb, int frametyp /* * Copy any Call User Data. */ - if (skb->len >= 0) { + if (skb->len > 0) { skb_copy_from_linear_data(skb, x25->calluserdata.cuddata, skb->len); diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c index 2c999cc..66961ea 100644 --- a/net/x25/x25_route.c +++ b/net/x25/x25_route.c @@ -190,7 +190,7 @@ int x25_route_ioctl(unsigned int cmd, void __user *arg) goto out; rc = -EINVAL; - if (rt.sigdigits < 0 || rt.sigdigits > 15) + if (rt.sigdigits > 15) goto out; dev = x25_dev_get(rt.device); -- cgit v1.1 From 3f378b684453f2a028eda463ce383370545d9cc9 Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Thu, 5 Nov 2009 22:18:14 -0800 Subject: net: pass kern to net_proto_family create function The generic __sock_create function has a kern argument which allows the security system to make decisions based on if a socket is being created by the kernel or by userspace. This patch passes that flag to the net_proto_family specific create function, so it can do the same thing. Signed-off-by: Eric Paris Acked-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/x25/af_x25.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index e19d811..38e235f 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -501,7 +501,8 @@ out: return sk; } -static int x25_create(struct net *net, struct socket *sock, int protocol) +static int x25_create(struct net *net, struct socket *sock, int protocol, + int kern) { struct sock *sk; struct x25_sock *x25; -- cgit v1.1 From 91774904fbf0fe1c71441dd8299342a4654f7103 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 5 Nov 2009 04:37:29 +0000 Subject: net/x25: push BKL usage into x25_proto The x25 driver uses lock_kernel() implicitly through its proto_ops wrapper. The makes the usage explicit in order to get rid of that wrapper and to better document the usage of the BKL. The next step should be to get rid of the usage of the BKL in x25 entirely, which requires understanding what data structures need serialized accesses. Cc: Henner Eisen Cc: David S. Miller Cc: linux-x25@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- net/x25/af_x25.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 60 insertions(+), 11 deletions(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 38e235f..39ce03e 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -415,6 +415,7 @@ static int x25_setsockopt(struct socket *sock, int level, int optname, struct sock *sk = sock->sk; int rc = -ENOPROTOOPT; + lock_kernel(); if (level != SOL_X25 || optname != X25_QBITINCL) goto out; @@ -429,6 +430,7 @@ static int x25_setsockopt(struct socket *sock, int level, int optname, x25_sk(sk)->qbitincl = !!opt; rc = 0; out: + unlock_kernel(); return rc; } @@ -438,6 +440,7 @@ static int x25_getsockopt(struct socket *sock, int level, int optname, struct sock *sk = sock->sk; int val, len, rc = -ENOPROTOOPT; + lock_kernel(); if (level != SOL_X25 || optname != X25_QBITINCL) goto out; @@ -458,6 +461,7 @@ static int x25_getsockopt(struct socket *sock, int level, int optname, val = x25_sk(sk)->qbitincl; rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; out: + unlock_kernel(); return rc; } @@ -466,12 +470,14 @@ static int x25_listen(struct socket *sock, int backlog) struct sock *sk = sock->sk; int rc = -EOPNOTSUPP; + lock_kernel(); if (sk->sk_state != TCP_LISTEN) { memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); sk->sk_max_ack_backlog = backlog; sk->sk_state = TCP_LISTEN; rc = 0; } + unlock_kernel(); return rc; } @@ -598,6 +604,7 @@ static int x25_release(struct socket *sock) struct sock *sk = sock->sk; struct x25_sock *x25; + lock_kernel(); if (!sk) goto out; @@ -628,6 +635,7 @@ static int x25_release(struct socket *sock) sock_orphan(sk); out: + unlock_kernel(); return 0; } @@ -635,18 +643,23 @@ static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; + int rc = 0; + lock_kernel(); if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_x25) || - addr->sx25_family != AF_X25) - return -EINVAL; + addr->sx25_family != AF_X25) { + rc = -EINVAL; + goto out; + } x25_sk(sk)->source_addr = addr->sx25_addr; x25_insert_socket(sk); sock_reset_flag(sk, SOCK_ZAPPED); SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); - - return 0; +out: + unlock_kernel(); + return rc; } static int x25_wait_for_connection_establishment(struct sock *sk) @@ -687,6 +700,7 @@ static int x25_connect(struct socket *sock, struct sockaddr *uaddr, struct x25_route *rt; int rc = 0; + lock_kernel(); lock_sock(sk); if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { sock->state = SS_CONNECTED; @@ -764,6 +778,7 @@ out_put_route: x25_route_put(rt); out: release_sock(sk); + unlock_kernel(); return rc; } @@ -803,6 +818,7 @@ static int x25_accept(struct socket *sock, struct socket *newsock, int flags) struct sk_buff *skb; int rc = -EINVAL; + lock_kernel(); if (!sk || sk->sk_state != TCP_LISTEN) goto out; @@ -830,6 +846,7 @@ static int x25_accept(struct socket *sock, struct socket *newsock, int flags) out2: release_sock(sk); out: + unlock_kernel(); return rc; } @@ -839,10 +856,14 @@ static int x25_getname(struct socket *sock, struct sockaddr *uaddr, struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; struct sock *sk = sock->sk; struct x25_sock *x25 = x25_sk(sk); + int rc = 0; + lock_kernel(); if (peer) { - if (sk->sk_state != TCP_ESTABLISHED) - return -ENOTCONN; + if (sk->sk_state != TCP_ESTABLISHED) { + rc = -ENOTCONN; + goto out; + } sx25->sx25_addr = x25->dest_addr; } else sx25->sx25_addr = x25->source_addr; @@ -850,7 +871,21 @@ static int x25_getname(struct socket *sock, struct sockaddr *uaddr, sx25->sx25_family = AF_X25; *uaddr_len = sizeof(*sx25); - return 0; +out: + unlock_kernel(); + return rc; +} + +static unsigned int x25_datagram_poll(struct file *file, struct socket *sock, + poll_table *wait) +{ + int rc; + + lock_kernel(); + rc = datagram_poll(file, sock, wait); + unlock_kernel(); + + return rc; } int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, @@ -1003,6 +1038,7 @@ static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, size_t size; int qbit = 0, rc = -EINVAL; + lock_kernel(); if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) goto out; @@ -1167,6 +1203,7 @@ static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, release_sock(sk); rc = len; out: + unlock_kernel(); return rc; out_kfree_skb: kfree_skb(skb); @@ -1187,6 +1224,7 @@ static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, unsigned char *asmptr; int rc = -ENOTCONN; + lock_kernel(); /* * This works for seqpacket too. The receiver has ordered the queue for * us! We do one quick check first though @@ -1260,6 +1298,7 @@ static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, out_free_dgram: skb_free_datagram(sk, skb); out: + unlock_kernel(); return rc; } @@ -1271,6 +1310,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) void __user *argp = (void __user *)arg; int rc; + lock_kernel(); switch (cmd) { case TIOCOUTQ: { int amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); @@ -1473,6 +1513,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) rc = -ENOIOCTLCMD; break; } + unlock_kernel(); return rc; } @@ -1543,15 +1584,19 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, break; case SIOCGSTAMP: rc = -EINVAL; + lock_kernel(); if (sk) rc = compat_sock_get_timestamp(sk, (struct timeval __user*)argp); + unlock_kernel(); break; case SIOCGSTAMPNS: rc = -EINVAL; + lock_kernel(); if (sk) rc = compat_sock_get_timestampns(sk, (struct timespec __user*)argp); + unlock_kernel(); break; case SIOCGIFADDR: case SIOCSIFADDR: @@ -1570,16 +1615,22 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, rc = -EPERM; if (!capable(CAP_NET_ADMIN)) break; + lock_kernel(); rc = x25_route_ioctl(cmd, argp); + unlock_kernel(); break; case SIOCX25GSUBSCRIP: + lock_kernel(); rc = compat_x25_subscr_ioctl(cmd, argp); + unlock_kernel(); break; case SIOCX25SSUBSCRIP: rc = -EPERM; if (!capable(CAP_NET_ADMIN)) break; + lock_kernel(); rc = compat_x25_subscr_ioctl(cmd, argp); + unlock_kernel(); break; case SIOCX25GFACILITIES: case SIOCX25SFACILITIES: @@ -1601,7 +1652,7 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, } #endif -static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = { +static const struct proto_ops x25_proto_ops = { .family = AF_X25, .owner = THIS_MODULE, .release = x25_release, @@ -1610,7 +1661,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = { .socketpair = sock_no_socketpair, .accept = x25_accept, .getname = x25_getname, - .poll = datagram_poll, + .poll = x25_datagram_poll, .ioctl = x25_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = compat_x25_ioctl, @@ -1625,8 +1676,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = { .sendpage = sock_no_sendpage, }; -SOCKOPS_WRAP(x25_proto, AF_X25); - static struct packet_type x25_packet_type __read_mostly = { .type = cpu_to_be16(ETH_P_X25), .func = x25_lapb_receive_frame, -- cgit v1.1 From 386e50cc7d82b3799ea6f53267f04f123ae05afe Mon Sep 17 00:00:00 2001 From: Andrew Hendry Date: Wed, 18 Nov 2009 23:30:41 -0800 Subject: X25: Enable setting of cause and diagnostic fields Adds SIOCX25SCAUSEDIAG, allowing X.25 programs to set the cause and diagnostic fields. Normally used to indicate status upon closing connections. Signed-off-by: Andrew Hendry Signed-off-by: David S. Miller --- net/x25/af_x25.c | 12 ++++++++++++ net/x25/x25_subr.c | 6 ++++++ 2 files changed, 18 insertions(+) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 39ce03e..ac7dba4 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1471,6 +1471,17 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) break; } + case SIOCX25SCAUSEDIAG: { + struct x25_causediag causediag; + rc = -EFAULT; + if (copy_from_user(&causediag, argp, sizeof(causediag))) + break; + x25->causediag = causediag; + rc = 0; + break; + + } + case SIOCX25SCUDMATCHLEN: { struct x25_subaddr sub_addr; rc = -EINVAL; @@ -1639,6 +1650,7 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, case SIOCX25GCALLUSERDATA: case SIOCX25SCALLUSERDATA: case SIOCX25GCAUSEDIAG: + case SIOCX25SCAUSEDIAG: case SIOCX25SCUDMATCHLEN: case SIOCX25CALLACCPTAPPRV: case SIOCX25SENDCALLACCPT: diff --git a/net/x25/x25_subr.c b/net/x25/x25_subr.c index 511a598..352b32d 100644 --- a/net/x25/x25_subr.c +++ b/net/x25/x25_subr.c @@ -225,6 +225,12 @@ void x25_write_internal(struct sock *sk, int frametype) break; case X25_CLEAR_REQUEST: + dptr = skb_put(skb, 3); + *dptr++ = frametype; + *dptr++ = x25->causediag.cause; + *dptr++ = x25->causediag.diagnostic; + break; + case X25_RESET_REQUEST: dptr = skb_put(skb, 3); *dptr++ = frametype; -- cgit v1.1 From 09ad9bc752519cc167d0a573e1acf69b5c707c67 Mon Sep 17 00:00:00 2001 From: Octavian Purdila Date: Wed, 25 Nov 2009 15:14:13 -0800 Subject: net: use net_eq to compare nets Generated with the following semantic patch @@ struct net *n1; struct net *n2; @@ - n1 == n2 + net_eq(n1, n2) @@ struct net *n1; struct net *n2; @@ - n1 != n2 + !net_eq(n1, n2) applied over {include,net,drivers/net}. Signed-off-by: Octavian Purdila Signed-off-by: David S. Miller --- net/x25/af_x25.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index ac7dba4..2a3a513 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -514,7 +514,7 @@ static int x25_create(struct net *net, struct socket *sock, int protocol, struct x25_sock *x25; int rc = -ESOCKTNOSUPPORT; - if (net != &init_net) + if (!net_eq(net, &init_net)) return -EAFNOSUPPORT; if (sock->type != SOCK_SEQPACKET || protocol) -- cgit v1.1 From 2f5517aefcfbdd7fdf0f03b13d292a10d445887f Mon Sep 17 00:00:00 2001 From: andrew hendry Date: Tue, 24 Nov 2009 15:15:26 +0000 Subject: X25: Move SYSCTL ifdefs into header Moves the CONFIG_SYSCTL ifdefs in x25_init into header. Signed-off-by: Andrew Hendry Acked-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- net/x25/af_x25.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 2a3a513..f327ef5 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1729,9 +1729,7 @@ static int __init x25_init(void) printk(KERN_INFO "X.25 for Linux Version 0.2\n"); -#ifdef CONFIG_SYSCTL x25_register_sysctl(); -#endif x25_proc_init(); out: return rc; @@ -1744,9 +1742,7 @@ static void __exit x25_exit(void) x25_link_free(); x25_route_free(); -#ifdef CONFIG_SYSCTL x25_unregister_sysctl(); -#endif unregister_netdevice_notifier(&x25_dev_notifier); -- cgit v1.1 From 1fd975a0520cdb27681855d5a18526e328d36b5c Mon Sep 17 00:00:00 2001 From: andrew hendry Date: Tue, 24 Nov 2009 15:15:42 +0000 Subject: X25: Check for errors in x25_init Adds error checking to x25_init. Signed-off-by: Andrew Hendry Signed-off-by: David S. Miller --- net/x25/af_x25.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'net/x25') diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index f327ef5..e3219e4 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -1721,18 +1721,31 @@ static int __init x25_init(void) if (rc != 0) goto out; - sock_register(&x25_family_ops); + rc = sock_register(&x25_family_ops); + if (rc != 0) + goto out_proto; dev_add_pack(&x25_packet_type); - register_netdevice_notifier(&x25_dev_notifier); + rc = register_netdevice_notifier(&x25_dev_notifier); + if (rc != 0) + goto out_sock; printk(KERN_INFO "X.25 for Linux Version 0.2\n"); x25_register_sysctl(); - x25_proc_init(); + rc = x25_proc_init(); + if (rc != 0) + goto out_dev; out: return rc; +out_dev: + unregister_netdevice_notifier(&x25_dev_notifier); +out_sock: + sock_unregister(AF_X25); +out_proto: + proto_unregister(&x25_proto); + goto out; } module_init(x25_init); -- cgit v1.1 From 429d33ace5ce6122817f8abe9d170eaa55dc3af9 Mon Sep 17 00:00:00 2001 From: andrew hendry Date: Tue, 24 Nov 2009 15:16:05 +0000 Subject: X25: Fix oops and refcnt problems from x25_dev_get Calls to x25_dev_get check for dev = NULL which was not set. It allowed x25 to set routes and ioctls on down interfaces. This caused oopses and refcnt problems on device_unregister. Signed-off-by: Andrew Hendry Signed-off-by: David S. Miller --- net/x25/x25_route.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net/x25') diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c index 66961ea..b95fae9 100644 --- a/net/x25/x25_route.c +++ b/net/x25/x25_route.c @@ -136,8 +136,10 @@ struct net_device *x25_dev_get(char *devname) #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE) && dev->type != ARPHRD_ETHER #endif - ))) + ))){ dev_put(dev); + dev = NULL; + } return dev; } -- cgit v1.1