From 72e09ad107e78d69ff4d3b97a69f0aad2b77280f Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 5 Jun 2010 03:03:30 -0700 Subject: ipv6: avoid high order allocations With mtu=9000, mld_newpack() use order-2 GFP_ATOMIC allocations, that are very unreliable, on machines where PAGE_SIZE=4K Limit allocated skbs to be at most one page. (order-0 allocations) Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/mcast.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 59f1881968c7..ab1622d7d409 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -1356,7 +1356,10 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size) IPV6_TLV_PADN, 0 }; /* we assume size > sizeof(ra) here */ - skb = sock_alloc_send_skb(sk, size + LL_ALLOCATED_SPACE(dev), 1, &err); + size += LL_ALLOCATED_SPACE(dev); + /* limit our allocations to order-0 page */ + size = min_t(int, size, SKB_MAX_ORDER(0, 0)); + skb = sock_alloc_send_skb(sk, size, 1, &err); if (!skb) return NULL; -- cgit v1.2.2 From 8ffb335e8d696affc04f963bf73ce2196f80edb9 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 6 Jun 2010 15:34:40 -0700 Subject: ip6mr: fix a typo in ip6mr_for_each_table() Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/ip6mr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 073071f2b75b..89c0b077c7aa 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -120,7 +120,7 @@ static void mroute_clean_tables(struct mr6_table *mrt); static void ipmr_expire_process(unsigned long arg); #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES -#define ip6mr_for_each_table(mrt, met) \ +#define ip6mr_for_each_table(mrt, net) \ list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list) static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) -- cgit v1.2.2 From 035320d54758e21227987e3aae0d46e7a04f4ddc Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 6 Jun 2010 23:48:40 +0000 Subject: ipmr: dont corrupt lists ipmr_rules_exit() and ip6mr_rules_exit() free a list of items, but forget to properly remove these items from list. List head is not changed and still points to freed memory. This can trigger a fault later when icmpv6_sk_exit() is called. Fix is to either reinit list, or use list_del() to properly remove items from list before freeing them. bugzilla report : https://bugzilla.kernel.org/show_bug.cgi?id=16120 Introduced by commit d1db275dd3f6e4 (ipv6: ip6mr: support multiple tables) and commit f0ad0860d01e (ipv4: ipmr: support multiple tables) Reported-by: Alex Zhavnerchik Signed-off-by: Eric Dumazet CC: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv6/ip6mr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 89c0b077c7aa..66078dad7fe8 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -254,8 +254,10 @@ static void __net_exit ip6mr_rules_exit(struct net *net) { struct mr6_table *mrt, *next; - list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) + list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { + list_del(&mrt->list); ip6mr_free_table(mrt); + } fib_rules_unregister(net->ipv6.mr6_rules_ops); } #else -- cgit v1.2.2 From 00d9d6a185de89edc0649ca4ead58f0283dfcbac Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 7 Jun 2010 22:24:44 +0000 Subject: ipv6: fix ICMP6_MIB_OUTERRORS In commit 1f8438a85366 (icmp: Account for ICMP out errors), I did a typo on IPV6 side, using ICMP6_MIB_OUTMSGS instead of ICMP6_MIB_OUTERRORS Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/icmp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index ce7992982557..03e62f94ff8e 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -483,7 +483,7 @@ route_done: np->tclass, NULL, &fl, (struct rt6_info*)dst, MSG_DONTWAIT, np->dontfrag); if (err) { - ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); + ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS); ip6_flush_pending_frames(sk); goto out_put; } @@ -565,7 +565,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb) np->dontfrag); if (err) { - ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); + ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS); ip6_flush_pending_frames(sk); goto out_put; } -- cgit v1.2.2