mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 23:23:55 +08:00
499923c7a3
Commit b2f5e7cd3d
(ipv6: Fix conflict resolutions during ipv6 binding)
introduced a regression where time-wait sockets were
not treated correctly. This resulted in the following:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000062
IP: [<ffffffff805d7d61>] ipv4_rcv_saddr_equal+0x61/0x70
...
Call Trace:
[<ffffffffa033847b>] ipv6_rcv_saddr_equal+0x1bb/0x250 [ipv6]
[<ffffffffa03505a8>] inet6_csk_bind_conflict+0x88/0xd0 [ipv6]
[<ffffffff805bb18e>] inet_csk_get_port+0x1ee/0x400
[<ffffffffa0319b7f>] inet6_bind+0x1cf/0x3a0 [ipv6]
[<ffffffff8056d17c>] ? sockfd_lookup_light+0x3c/0xd0
[<ffffffff8056ed49>] sys_bind+0x89/0x100
[<ffffffff80613ea2>] ? trace_hardirqs_on_thunk+0x3a/0x3c
[<ffffffff8020bf9b>] system_call_fastpath+0x16/0x1b
Tested-by: Brian Haley <brian.haley@hp.com>
Tested-by: Ed Tomlinson <edt@aei.ca>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
211 lines
6.1 KiB
C
211 lines
6.1 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Definitions for the UDP module.
|
|
*
|
|
* Version: @(#)udp.h 1.0.2 05/07/93
|
|
*
|
|
* Authors: Ross Biro
|
|
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
|
*
|
|
* Fixes:
|
|
* Alan Cox : Turned on udp checksums. I don't want to
|
|
* chase 'memory corruption' bugs that aren't!
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#ifndef _UDP_H
|
|
#define _UDP_H
|
|
|
|
#include <linux/list.h>
|
|
#include <net/inet_sock.h>
|
|
#include <net/sock.h>
|
|
#include <net/snmp.h>
|
|
#include <net/ip.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/poll.h>
|
|
|
|
/**
|
|
* struct udp_skb_cb - UDP(-Lite) private variables
|
|
*
|
|
* @header: private variables used by IPv4/IPv6
|
|
* @cscov: checksum coverage length (UDP-Lite only)
|
|
* @partial_cov: if set indicates partial csum coverage
|
|
*/
|
|
struct udp_skb_cb {
|
|
union {
|
|
struct inet_skb_parm h4;
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
|
struct inet6_skb_parm h6;
|
|
#endif
|
|
} header;
|
|
__u16 cscov;
|
|
__u8 partial_cov;
|
|
};
|
|
#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
|
|
|
|
struct udp_hslot {
|
|
struct hlist_nulls_head head;
|
|
spinlock_t lock;
|
|
} __attribute__((aligned(2 * sizeof(long))));
|
|
struct udp_table {
|
|
struct udp_hslot hash[UDP_HTABLE_SIZE];
|
|
};
|
|
extern struct udp_table udp_table;
|
|
extern void udp_table_init(struct udp_table *);
|
|
|
|
|
|
/* Note: this must match 'valbool' in sock_setsockopt */
|
|
#define UDP_CSUM_NOXMIT 1
|
|
|
|
/* Used by SunRPC/xprt layer. */
|
|
#define UDP_CSUM_NORCV 2
|
|
|
|
/* Default, as per the RFC, is to always do csums. */
|
|
#define UDP_CSUM_DEFAULT 0
|
|
|
|
extern struct proto udp_prot;
|
|
|
|
extern atomic_t udp_memory_allocated;
|
|
|
|
/* sysctl variables for udp */
|
|
extern int sysctl_udp_mem[3];
|
|
extern int sysctl_udp_rmem_min;
|
|
extern int sysctl_udp_wmem_min;
|
|
|
|
struct sk_buff;
|
|
|
|
/*
|
|
* Generic checksumming routines for UDP(-Lite) v4 and v6
|
|
*/
|
|
static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb)
|
|
{
|
|
return __skb_checksum_complete_head(skb, UDP_SKB_CB(skb)->cscov);
|
|
}
|
|
|
|
static inline int udp_lib_checksum_complete(struct sk_buff *skb)
|
|
{
|
|
return !skb_csum_unnecessary(skb) &&
|
|
__udp_lib_checksum_complete(skb);
|
|
}
|
|
|
|
/**
|
|
* udp_csum_outgoing - compute UDPv4/v6 checksum over fragments
|
|
* @sk: socket we are writing to
|
|
* @skb: sk_buff containing the filled-in UDP header
|
|
* (checksum field must be zeroed out)
|
|
*/
|
|
static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
__wsum csum = csum_partial(skb_transport_header(skb),
|
|
sizeof(struct udphdr), 0);
|
|
skb_queue_walk(&sk->sk_write_queue, skb) {
|
|
csum = csum_add(csum, skb->csum);
|
|
}
|
|
return csum;
|
|
}
|
|
|
|
/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
|
|
static inline void udp_lib_hash(struct sock *sk)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
extern void udp_lib_unhash(struct sock *sk);
|
|
|
|
static inline void udp_lib_close(struct sock *sk, long timeout)
|
|
{
|
|
sk_common_release(sk);
|
|
}
|
|
|
|
extern int udp_lib_get_port(struct sock *sk, unsigned short snum,
|
|
int (*)(const struct sock*,const struct sock*));
|
|
|
|
/* net/ipv4/udp.c */
|
|
extern int udp_get_port(struct sock *sk, unsigned short snum,
|
|
int (*saddr_cmp)(const struct sock *, const struct sock *));
|
|
extern void udp_err(struct sk_buff *, u32);
|
|
|
|
extern int udp_sendmsg(struct kiocb *iocb, struct sock *sk,
|
|
struct msghdr *msg, size_t len);
|
|
extern void udp_flush_pending_frames(struct sock *sk);
|
|
|
|
extern int udp_rcv(struct sk_buff *skb);
|
|
extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg);
|
|
extern int udp_disconnect(struct sock *sk, int flags);
|
|
extern unsigned int udp_poll(struct file *file, struct socket *sock,
|
|
poll_table *wait);
|
|
extern int udp_lib_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen);
|
|
extern int udp_lib_setsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int optlen,
|
|
int (*push_pending_frames)(struct sock *));
|
|
|
|
extern struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
|
|
__be32 daddr, __be16 dport,
|
|
int dif);
|
|
|
|
/*
|
|
* SNMP statistics for UDP and UDP-Lite
|
|
*/
|
|
#define UDP_INC_STATS_USER(net, field, is_udplite) do { \
|
|
if (is_udplite) SNMP_INC_STATS_USER((net)->mib.udplite_statistics, field); \
|
|
else SNMP_INC_STATS_USER((net)->mib.udp_statistics, field); } while(0)
|
|
#define UDP_INC_STATS_BH(net, field, is_udplite) do { \
|
|
if (is_udplite) SNMP_INC_STATS_BH((net)->mib.udplite_statistics, field); \
|
|
else SNMP_INC_STATS_BH((net)->mib.udp_statistics, field); } while(0)
|
|
|
|
#define UDP6_INC_STATS_BH(net, field, is_udplite) do { \
|
|
if (is_udplite) SNMP_INC_STATS_BH((net)->mib.udplite_stats_in6, field);\
|
|
else SNMP_INC_STATS_BH((net)->mib.udp_stats_in6, field); \
|
|
} while(0)
|
|
#define UDP6_INC_STATS_USER(net, field, __lite) do { \
|
|
if (__lite) SNMP_INC_STATS_USER((net)->mib.udplite_stats_in6, field); \
|
|
else SNMP_INC_STATS_USER((net)->mib.udp_stats_in6, field); \
|
|
} while(0)
|
|
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
#define UDPX_INC_STATS_BH(sk, field) \
|
|
do { \
|
|
if ((sk)->sk_family == AF_INET) \
|
|
UDP_INC_STATS_BH(sock_net(sk), field, 0); \
|
|
else \
|
|
UDP6_INC_STATS_BH(sock_net(sk), field, 0); \
|
|
} while (0);
|
|
#else
|
|
#define UDPX_INC_STATS_BH(sk, field) UDP_INC_STATS_BH(sock_net(sk), field, 0)
|
|
#endif
|
|
|
|
/* /proc */
|
|
struct udp_seq_afinfo {
|
|
char *name;
|
|
sa_family_t family;
|
|
struct udp_table *udp_table;
|
|
struct file_operations seq_fops;
|
|
struct seq_operations seq_ops;
|
|
};
|
|
|
|
struct udp_iter_state {
|
|
struct seq_net_private p;
|
|
sa_family_t family;
|
|
int bucket;
|
|
struct udp_table *udp_table;
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
extern int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo);
|
|
extern void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo);
|
|
|
|
extern int udp4_proc_init(void);
|
|
extern void udp4_proc_exit(void);
|
|
#endif
|
|
|
|
extern void udp_init(void);
|
|
#endif /* _UDP_H */
|