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Diffstat (limited to 'net')
-rw-r--r--net/bridge/netfilter/ebtables.c4
-rw-r--r--net/core/stream.c16
-rw-r--r--net/ipv4/route.c12
-rw-r--r--net/ipv6/output_core.c30
-rw-r--r--net/mac80211/cfg.c9
-rw-r--r--net/netfilter/nf_conntrack_core.c35
-rw-r--r--net/netfilter/nf_conntrack_netlink.c34
-rw-r--r--net/wireless/reg.c2
8 files changed, 105 insertions, 37 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 1a87cf78fadc..d9471e3ef216 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -2280,8 +2280,10 @@ static int compat_do_replace(struct net *net, void __user *user,
state.buf_kern_len = size64;
ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state);
- if (WARN_ON(ret < 0))
+ if (WARN_ON(ret < 0)) {
+ vfree(entries_tmp);
goto out_unlock;
+ }
vfree(entries_tmp);
tmp.entries_size = size64;
diff --git a/net/core/stream.c b/net/core/stream.c
index b96f7a79e544..3089b014bb53 100644
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -119,7 +119,6 @@ int sk_stream_wait_memory(struct sock *sk, long *timeo_p)
int err = 0;
long vm_wait = 0;
long current_timeo = *timeo_p;
- bool noblock = (*timeo_p ? false : true);
DEFINE_WAIT(wait);
if (sk_stream_memory_free(sk))
@@ -132,11 +131,8 @@ int sk_stream_wait_memory(struct sock *sk, long *timeo_p)
if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
goto do_error;
- if (!*timeo_p) {
- if (noblock)
- set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
- goto do_nonblock;
- }
+ if (!*timeo_p)
+ goto do_eagain;
if (signal_pending(current))
goto do_interrupted;
sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
@@ -168,7 +164,13 @@ out:
do_error:
err = -EPIPE;
goto out;
-do_nonblock:
+do_eagain:
+ /* Make sure that whenever EAGAIN is returned, EPOLLOUT event can
+ * be generated later.
+ * When TCP receives ACK packets that make room, tcp_check_space()
+ * only calls tcp_new_space() if SOCK_NOSPACE is set.
+ */
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
err = -EAGAIN;
goto out;
do_interrupted:
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 2c661934e557..397b72f15047 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -490,15 +490,17 @@ EXPORT_SYMBOL(ip_idents_reserve);
void __ip_select_ident(struct net *net, struct iphdr *iph, int segs)
{
- static u32 ip_idents_hashrnd __read_mostly;
u32 hash, id;
- net_get_random_once(&ip_idents_hashrnd, sizeof(ip_idents_hashrnd));
+ /* Note the following code is not safe, but this is okay. */
+ if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))
+ get_random_bytes(&net->ipv4.ip_id_key,
+ sizeof(net->ipv4.ip_id_key));
- hash = jhash_3words((__force u32)iph->daddr,
+ hash = siphash_3u32((__force u32)iph->daddr,
(__force u32)iph->saddr,
- iph->protocol ^ net_hash_mix(net),
- ip_idents_hashrnd);
+ iph->protocol,
+ &net->ipv4.ip_id_key);
id = ip_idents_reserve(hash, segs);
iph->id = htons(id);
}
diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index f99a04674419..6b896cc9604e 100644
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -10,15 +10,25 @@
#include <net/secure_seq.h>
#include <linux/netfilter.h>
-static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
+static u32 __ipv6_select_ident(struct net *net,
const struct in6_addr *dst,
const struct in6_addr *src)
{
+ const struct {
+ struct in6_addr dst;
+ struct in6_addr src;
+ } __aligned(SIPHASH_ALIGNMENT) combined = {
+ .dst = *dst,
+ .src = *src,
+ };
u32 hash, id;
- hash = __ipv6_addr_jhash(dst, hashrnd);
- hash = __ipv6_addr_jhash(src, hash);
- hash ^= net_hash_mix(net);
+ /* Note the following code is not safe, but this is okay. */
+ if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))
+ get_random_bytes(&net->ipv4.ip_id_key,
+ sizeof(net->ipv4.ip_id_key));
+
+ hash = siphash(&combined, sizeof(combined), &net->ipv4.ip_id_key);
/* Treat id of 0 as unset and if we get 0 back from ip_idents_reserve,
* set the hight order instead thus minimizing possible future
@@ -41,7 +51,6 @@ static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
*/
void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
{
- static u32 ip6_proxy_idents_hashrnd __read_mostly;
struct in6_addr buf[2];
struct in6_addr *addrs;
u32 id;
@@ -53,11 +62,7 @@ void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
if (!addrs)
return;
- net_get_random_once(&ip6_proxy_idents_hashrnd,
- sizeof(ip6_proxy_idents_hashrnd));
-
- id = __ipv6_select_ident(net, ip6_proxy_idents_hashrnd,
- &addrs[1], &addrs[0]);
+ id = __ipv6_select_ident(net, &addrs[1], &addrs[0]);
skb_shinfo(skb)->ip6_frag_id = htonl(id);
}
EXPORT_SYMBOL_GPL(ipv6_proxy_select_ident);
@@ -66,12 +71,9 @@ __be32 ipv6_select_ident(struct net *net,
const struct in6_addr *daddr,
const struct in6_addr *saddr)
{
- static u32 ip6_idents_hashrnd __read_mostly;
u32 id;
- net_get_random_once(&ip6_idents_hashrnd, sizeof(ip6_idents_hashrnd));
-
- id = __ipv6_select_ident(net, ip6_idents_hashrnd, daddr, saddr);
+ id = __ipv6_select_ident(net, daddr, saddr);
return htonl(id);
}
EXPORT_SYMBOL(ipv6_select_ident);
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 7349bf26ae7b..1999a7eaa692 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1211,6 +1211,11 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
if (is_multicast_ether_addr(mac))
return -EINVAL;
+ if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
+ sdata->vif.type == NL80211_IFTYPE_STATION &&
+ !sdata->u.mgd.associated)
+ return -EINVAL;
+
sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
if (!sta)
return -ENOMEM;
@@ -1228,10 +1233,6 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
sta->sta.tdls = true;
- if (sta->sta.tdls && sdata->vif.type == NL80211_IFTYPE_STATION &&
- !sdata->u.mgd.associated)
- return -EINVAL;
-
err = sta_apply_parameters(local, sta, params);
if (err) {
sta_info_free(local, sta);
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 0610e8cfe6be..d637d151d0c7 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/jhash.h>
+#include <linux/siphash.h>
#include <linux/err.h>
#include <linux/percpu.h>
#include <linux/moduleparam.h>
@@ -234,6 +235,40 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
}
EXPORT_SYMBOL_GPL(nf_ct_invert_tuple);
+/* Generate a almost-unique pseudo-id for a given conntrack.
+ *
+ * intentionally doesn't re-use any of the seeds used for hash
+ * table location, we assume id gets exposed to userspace.
+ *
+ * Following nf_conn items do not change throughout lifetime
+ * of the nf_conn:
+ *
+ * 1. nf_conn address
+ * 2. nf_conn->master address (normally NULL)
+ * 3. the associated net namespace
+ * 4. the original direction tuple
+ */
+u32 nf_ct_get_id(const struct nf_conn *ct)
+{
+ static __read_mostly siphash_key_t ct_id_seed;
+ unsigned long a, b, c, d;
+
+ net_get_random_once(&ct_id_seed, sizeof(ct_id_seed));
+
+ a = (unsigned long)ct;
+ b = (unsigned long)ct->master;
+ c = (unsigned long)nf_ct_net(ct);
+ d = (unsigned long)siphash(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
+ sizeof(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple),
+ &ct_id_seed);
+#ifdef CONFIG_64BIT
+ return siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &ct_id_seed);
+#else
+ return siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &ct_id_seed);
+#endif
+}
+EXPORT_SYMBOL_GPL(nf_ct_get_id);
+
static void
clean_from_lists(struct nf_conn *ct)
{
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index c68e020427ab..3a24c01cb909 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -29,6 +29,7 @@
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
+#include <linux/siphash.h>
#include <linux/netfilter.h>
#include <net/netlink.h>
@@ -451,7 +452,9 @@ ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, const struct nf_conn *ct)
static inline int
ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
{
- if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
+ __be32 id = (__force __be32)nf_ct_get_id(ct);
+
+ if (nla_put_be32(skb, CTA_ID, id))
goto nla_put_failure;
return 0;
@@ -1159,8 +1162,9 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
ct = nf_ct_tuplehash_to_ctrack(h);
if (cda[CTA_ID]) {
- u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID]));
- if (id != (u32)(unsigned long)ct) {
+ __be32 id = nla_get_be32(cda[CTA_ID]);
+
+ if (id != (__force __be32)nf_ct_get_id(ct)) {
nf_ct_put(ct);
return -ENOENT;
}
@@ -2480,6 +2484,25 @@ nla_put_failure:
static const union nf_inet_addr any_addr;
+static __be32 nf_expect_get_id(const struct nf_conntrack_expect *exp)
+{
+ static __read_mostly siphash_key_t exp_id_seed;
+ unsigned long a, b, c, d;
+
+ net_get_random_once(&exp_id_seed, sizeof(exp_id_seed));
+
+ a = (unsigned long)exp;
+ b = (unsigned long)exp->helper;
+ c = (unsigned long)exp->master;
+ d = (unsigned long)siphash(&exp->tuple, sizeof(exp->tuple), &exp_id_seed);
+
+#ifdef CONFIG_64BIT
+ return (__force __be32)siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &exp_id_seed);
+#else
+ return (__force __be32)siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &exp_id_seed);
+#endif
+}
+
static int
ctnetlink_exp_dump_expect(struct sk_buff *skb,
const struct nf_conntrack_expect *exp)
@@ -2527,7 +2550,7 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
}
#endif
if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
- nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) ||
+ nla_put_be32(skb, CTA_EXPECT_ID, nf_expect_get_id(exp)) ||
nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
goto nla_put_failure;
@@ -2824,7 +2847,8 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
if (cda[CTA_EXPECT_ID]) {
__be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
- if (ntohl(id) != (u32)(unsigned long)exp) {
+
+ if (id != nf_expect_get_id(exp)) {
nf_ct_expect_put(exp);
return -ENOENT;
}
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 53925b3899e1..a3d08bbaa457 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2277,7 +2277,7 @@ static void reg_process_pending_hints(void)
/* When last_request->processed becomes true this will be rescheduled */
if (lr && !lr->processed) {
- reg_process_hint(lr);
+ pr_debug("Pending regulatory request, waiting for it to be processed...\n");
return;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 04:41:41 +0000