From f8e9881c2aef1e982e5abc25c046820cd0b7cf64 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 12 Apr 2011 13:39:14 -0700 Subject: bridge: reset IPCB in br_parse_ip_options MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 462fb2af9788a82 (bridge : Sanitize skb before it enters the IP stack), missed one IPCB init before calling ip_options_compile() Thanks to Scot Doyle for his tests and bug reports. Reported-by: Scot Doyle Signed-off-by: Eric Dumazet Cc: Hiroaki SHIMODA Acked-by: Bandan Das Acked-by: Stephen Hemminger Cc: Jan Lübbe Signed-off-by: David S. Miller --- net/bridge/br_netfilter.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 008ff6c4eecf..f3bc322c5891 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -249,11 +249,9 @@ static int br_parse_ip_options(struct sk_buff *skb) goto drop; } - /* Zero out the CB buffer if no options present */ - if (iph->ihl == 5) { - memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); + memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); + if (iph->ihl == 5) return 0; - } opt->optlen = iph->ihl*4 - sizeof(struct iphdr); if (ip_options_compile(dev_net(dev), opt, skb)) -- cgit v1.2.3 From f01cb5fbea1c1613621f9f32f385e12c1a29dde0 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 21 Apr 2011 21:17:25 -0700 Subject: Revert "bridge: Forward reserved group addresses if !STP" This reverts commit 1e253c3b8a1aeed51eef6fc366812f219b97de65. It breaks 802.3ad bonding inside of a bridge. The commit was meant to support transport bridging, and specifically virtual machines bridged to an ethernet interface connected to a switch port wiht 802.1x enabled. But this isn't the way to do it, it breaks too many other things. Signed-off-by: David S. Miller --- net/bridge/br_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/bridge') diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index e2160792e1bc..0c7badad62af 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -164,7 +164,7 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb) goto drop; /* If STP is turned off, then forward */ - if (p->br->stp_enabled == BR_NO_STP) + if (p->br->stp_enabled == BR_NO_STP && dest[5] == 0) goto forward; if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev, -- cgit v1.2.3 From 5a6351eecf8c87afed9c883bb6341d09406d74ba Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 21 Apr 2011 10:57:21 +0200 Subject: netfilter: fix ebtables compat support commit 255d0dc34068a976 (netfilter: x_table: speedup compat operations) made ebtables not working anymore. 1) xt_compat_calc_jump() is not an exact match lookup 2) compat_table_info() has a typo in xt_compat_init_offsets() call 3) compat_do_replace() misses a xt_compat_init_offsets() call Reported-by: dann frazier Signed-off-by: Eric Dumazet Signed-off-by: Patrick McHardy --- net/bridge/netfilter/ebtables.c | 3 ++- net/netfilter/x_tables.c | 4 ++-- 2 files changed, 4 insertions(+), 3 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 893669caa8de..9707079bc40a 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1766,7 +1766,7 @@ static int compat_table_info(const struct ebt_table_info *info, newinfo->entries_size = size; - xt_compat_init_offsets(AF_INET, info->nentries); + xt_compat_init_offsets(NFPROTO_BRIDGE, info->nentries); return EBT_ENTRY_ITERATE(entries, size, compat_calc_entry, info, entries, newinfo); } @@ -2240,6 +2240,7 @@ static int compat_do_replace(struct net *net, void __user *user, xt_compat_lock(NFPROTO_BRIDGE); + xt_compat_init_offsets(NFPROTO_BRIDGE, tmp.nentries); ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state); if (ret < 0) goto out_unlock; diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index a9adf4c6b299..8a025a585d2f 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -455,6 +455,7 @@ void xt_compat_flush_offsets(u_int8_t af) vfree(xt[af].compat_tab); xt[af].compat_tab = NULL; xt[af].number = 0; + xt[af].cur = 0; } } EXPORT_SYMBOL_GPL(xt_compat_flush_offsets); @@ -473,8 +474,7 @@ int xt_compat_calc_jump(u_int8_t af, unsigned int offset) else return mid ? tmp[mid - 1].delta : 0; } - WARN_ON_ONCE(1); - return 0; + return left ? tmp[left - 1].delta : 0; } EXPORT_SYMBOL_GPL(xt_compat_calc_jump); -- cgit v1.2.3 From 103a9778e07bcc0cd34b5c35a87281454eec719e Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Thu, 21 Apr 2011 10:58:25 +0200 Subject: netfilter: ebtables: only call xt_compat_add_offset once per rule The optimizations in commit 255d0dc34068a976 (netfilter: x_table: speedup compat operations) assume that xt_compat_add_offset is called once per rule. ebtables however called it for each match/target found in a rule. The match/watcher/target parser already returns the needed delta, so it is sufficient to move the xt_compat_add_offset call to a more reasonable location. While at it, also get rid of the unused COMPAT iterator macros. Signed-off-by: Florian Westphal Signed-off-by: Patrick McHardy --- net/bridge/netfilter/ebtables.c | 61 ++++++----------------------------------- 1 file changed, 9 insertions(+), 52 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 9707079bc40a..1a92b369c820 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1882,7 +1882,7 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt, struct xt_match *match; struct xt_target *wt; void *dst = NULL; - int off, pad = 0, ret = 0; + int off, pad = 0; unsigned int size_kern, entry_offset, match_size = mwt->match_size; strlcpy(name, mwt->u.name, sizeof(name)); @@ -1935,13 +1935,6 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt, break; } - if (!dst) { - ret = xt_compat_add_offset(NFPROTO_BRIDGE, entry_offset, - off + ebt_compat_entry_padsize()); - if (ret < 0) - return ret; - } - state->buf_kern_offset += match_size + off; state->buf_user_offset += match_size; pad = XT_ALIGN(size_kern) - size_kern; @@ -2016,50 +2009,6 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32, return growth; } -#define EBT_COMPAT_WATCHER_ITERATE(e, fn, args...) \ -({ \ - unsigned int __i; \ - int __ret = 0; \ - struct compat_ebt_entry_mwt *__watcher; \ - \ - for (__i = e->watchers_offset; \ - __i < (e)->target_offset; \ - __i += __watcher->watcher_size + \ - sizeof(struct compat_ebt_entry_mwt)) { \ - __watcher = (void *)(e) + __i; \ - __ret = fn(__watcher , ## args); \ - if (__ret != 0) \ - break; \ - } \ - if (__ret == 0) { \ - if (__i != (e)->target_offset) \ - __ret = -EINVAL; \ - } \ - __ret; \ -}) - -#define EBT_COMPAT_MATCH_ITERATE(e, fn, args...) \ -({ \ - unsigned int __i; \ - int __ret = 0; \ - struct compat_ebt_entry_mwt *__match; \ - \ - for (__i = sizeof(struct ebt_entry); \ - __i < (e)->watchers_offset; \ - __i += __match->match_size + \ - sizeof(struct compat_ebt_entry_mwt)) { \ - __match = (void *)(e) + __i; \ - __ret = fn(__match , ## args); \ - if (__ret != 0) \ - break; \ - } \ - if (__ret == 0) { \ - if (__i != (e)->watchers_offset) \ - __ret = -EINVAL; \ - } \ - __ret; \ -}) - /* called for all ebt_entry structures. */ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base, unsigned int *total, @@ -2132,6 +2081,14 @@ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base, } } + if (state->buf_kern_start == NULL) { + unsigned int offset = buf_start - (char *) base; + + ret = xt_compat_add_offset(NFPROTO_BRIDGE, offset, new_offset); + if (ret < 0) + return ret; + } + startoff = state->buf_user_offset - startoff; BUG_ON(*total < startoff); -- cgit v1.2.3 From cb68552858c64db302771469b1202ea09e696329 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 13 May 2011 16:03:24 -0400 Subject: bridge: fix forwarding of IPv6 The commit 6b1e960fdbd75dcd9bcc3ba5ff8898ff1ad30b6e bridge: Reset IPCB when entering IP stack on NF_FORWARD broke forwarding of IPV6 packets in bridge because it would call bp_parse_ip_options with an IPV6 packet. Reported-by: Noah Meyerhans Signed-off-by: Stephen Hemminger Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller --- net/bridge/br_netfilter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/bridge') diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index f3bc322c5891..74ef4d4846a4 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -737,7 +737,7 @@ static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff *skb, nf_bridge->mask |= BRNF_PKT_TYPE; } - if (br_parse_ip_options(skb)) + if (pf == PF_INET && br_parse_ip_options(skb)) return NF_DROP; /* The physdev module checks on this */ -- cgit v1.2.3