diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/611-netfilter_match_bypass_default_table.patch')
-rw-r--r-- | target/linux/generic/pending-5.4/611-netfilter_match_bypass_default_table.patch | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/target/linux/generic/pending-5.4/611-netfilter_match_bypass_default_table.patch b/target/linux/generic/pending-5.4/611-netfilter_match_bypass_default_table.patch deleted file mode 100644 index baf738a8d2..0000000000 --- a/target/linux/generic/pending-5.4/611-netfilter_match_bypass_default_table.patch +++ /dev/null @@ -1,106 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Subject: netfilter: match bypass default table - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - net/ipv4/netfilter/ip_tables.c | 79 +++++++++++++++++++++++++++++++----------- - 1 file changed, 58 insertions(+), 21 deletions(-) - ---- a/net/ipv4/netfilter/ip_tables.c -+++ b/net/ipv4/netfilter/ip_tables.c -@@ -246,6 +246,33 @@ struct ipt_entry *ipt_next_entry(const s - return (void *)entry + entry->next_offset; - } - -+static bool -+ipt_handle_default_rule(struct ipt_entry *e, unsigned int *verdict) -+{ -+ struct xt_entry_target *t; -+ struct xt_standard_target *st; -+ -+ if (e->target_offset != sizeof(struct ipt_entry)) -+ return false; -+ -+ if (!(e->ip.flags & IPT_F_NO_DEF_MATCH)) -+ return false; -+ -+ t = ipt_get_target(e); -+ if (t->u.kernel.target->target) -+ return false; -+ -+ st = (struct xt_standard_target *) t; -+ if (st->verdict == XT_RETURN) -+ return false; -+ -+ if (st->verdict >= 0) -+ return false; -+ -+ *verdict = (unsigned)(-st->verdict) - 1; -+ return true; -+} -+ - /* Returns one of the generic firewall policies, like NF_ACCEPT. */ - unsigned int - ipt_do_table(struct sk_buff *skb, -@@ -266,27 +293,28 @@ ipt_do_table(struct sk_buff *skb, - unsigned int addend; - - /* Initialization */ -+ WARN_ON(!(table->valid_hooks & (1 << hook))); -+ local_bh_disable(); -+ private = READ_ONCE(table->private); /* Address dependency. */ -+ cpu = smp_processor_id(); -+ table_base = private->entries; -+ -+ e = get_entry(table_base, private->hook_entry[hook]); -+ if (ipt_handle_default_rule(e, &verdict)) { -+ struct xt_counters *counter; -+ -+ counter = xt_get_this_cpu_counter(&e->counters); -+ ADD_COUNTER(*counter, skb->len, 1); -+ local_bh_enable(); -+ return verdict; -+ } -+ - stackidx = 0; - ip = ip_hdr(skb); - indev = state->in ? state->in->name : nulldevname; - outdev = state->out ? state->out->name : nulldevname; -- /* We handle fragments by dealing with the first fragment as -- * if it was a normal packet. All other fragments are treated -- * normally, except that they will NEVER match rules that ask -- * things we don't know, ie. tcp syn flag or ports). If the -- * rule is also a fragment-specific rule, non-fragments won't -- * match it. */ -- acpar.fragoff = ntohs(ip->frag_off) & IP_OFFSET; -- acpar.thoff = ip_hdrlen(skb); -- acpar.hotdrop = false; -- acpar.state = state; - -- WARN_ON(!(table->valid_hooks & (1 << hook))); -- local_bh_disable(); - addend = xt_write_recseq_begin(); -- private = READ_ONCE(table->private); /* Address dependency. */ -- cpu = smp_processor_id(); -- table_base = private->entries; - jumpstack = (struct ipt_entry **)private->jumpstack[cpu]; - - /* Switch to alternate jumpstack if we're being invoked via TEE. -@@ -299,7 +327,16 @@ ipt_do_table(struct sk_buff *skb, - if (static_key_false(&xt_tee_enabled)) - jumpstack += private->stacksize * __this_cpu_read(nf_skb_duplicated); - -- e = get_entry(table_base, private->hook_entry[hook]); -+ /* We handle fragments by dealing with the first fragment as -+ * if it was a normal packet. All other fragments are treated -+ * normally, except that they will NEVER match rules that ask -+ * things we don't know, ie. tcp syn flag or ports). If the -+ * rule is also a fragment-specific rule, non-fragments won't -+ * match it. */ -+ acpar.fragoff = ntohs(ip->frag_off) & IP_OFFSET; -+ acpar.thoff = ip_hdrlen(skb); -+ acpar.hotdrop = false; -+ acpar.state = state; - - do { - const struct xt_entry_target *t; |