diff options
Diffstat (limited to 'target/linux/generic/pending-4.19/610-netfilter_match_bypass_default_checks.patch')
-rw-r--r-- | target/linux/generic/pending-4.19/610-netfilter_match_bypass_default_checks.patch | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/target/linux/generic/pending-4.19/610-netfilter_match_bypass_default_checks.patch b/target/linux/generic/pending-4.19/610-netfilter_match_bypass_default_checks.patch deleted file mode 100644 index 1691146825..0000000000 --- a/target/linux/generic/pending-4.19/610-netfilter_match_bypass_default_checks.patch +++ /dev/null @@ -1,110 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Subject: kernel: add a new version of my netfilter speedup patches for linux 2.6.39 and 3.0 - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - include/uapi/linux/netfilter_ipv4/ip_tables.h | 1 + - net/ipv4/netfilter/ip_tables.c | 37 +++++++++++++++++++++++++++ - 2 files changed, 38 insertions(+) - ---- a/include/uapi/linux/netfilter_ipv4/ip_tables.h -+++ b/include/uapi/linux/netfilter_ipv4/ip_tables.h -@@ -89,6 +89,7 @@ struct ipt_ip { - #define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */ - #define IPT_F_GOTO 0x02 /* Set if jump is a goto */ - #define IPT_F_MASK 0x03 /* All possible flag bits mask. */ -+#define IPT_F_NO_DEF_MATCH 0x80 /* Internal: no default match rules present */ - - /* Values for "inv" field in struct ipt_ip. */ - #define IPT_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */ ---- a/net/ipv4/netfilter/ip_tables.c -+++ b/net/ipv4/netfilter/ip_tables.c -@@ -53,6 +53,9 @@ ip_packet_match(const struct iphdr *ip, - { - unsigned long ret; - -+ if (ipinfo->flags & IPT_F_NO_DEF_MATCH) -+ return true; -+ - if (NF_INVF(ipinfo, IPT_INV_SRCIP, - (ip->saddr & ipinfo->smsk.s_addr) != ipinfo->src.s_addr) || - NF_INVF(ipinfo, IPT_INV_DSTIP, -@@ -83,6 +86,29 @@ ip_packet_match(const struct iphdr *ip, - return true; - } - -+static void -+ip_checkdefault(struct ipt_ip *ip) -+{ -+ static const char iface_mask[IFNAMSIZ] = {}; -+ -+ if (ip->invflags || ip->flags & IPT_F_FRAG) -+ return; -+ -+ if (memcmp(ip->iniface_mask, iface_mask, IFNAMSIZ) != 0) -+ return; -+ -+ if (memcmp(ip->outiface_mask, iface_mask, IFNAMSIZ) != 0) -+ return; -+ -+ if (ip->smsk.s_addr || ip->dmsk.s_addr) -+ return; -+ -+ if (ip->proto) -+ return; -+ -+ ip->flags |= IPT_F_NO_DEF_MATCH; -+} -+ - static bool - ip_checkentry(const struct ipt_ip *ip) - { -@@ -527,6 +553,8 @@ find_check_entry(struct ipt_entry *e, st - struct xt_mtchk_param mtpar; - struct xt_entry_match *ematch; - -+ ip_checkdefault(&e->ip); -+ - if (!xt_percpu_counter_alloc(alloc_state, &e->counters)) - return -ENOMEM; - -@@ -821,6 +849,7 @@ copy_entries_to_user(unsigned int total_ - const struct xt_table_info *private = table->private; - int ret = 0; - const void *loc_cpu_entry; -+ u8 flags; - - counters = alloc_counters(table); - if (IS_ERR(counters)) -@@ -848,6 +877,14 @@ copy_entries_to_user(unsigned int total_ - goto free_counters; - } - -+ flags = e->ip.flags & IPT_F_MASK; -+ if (copy_to_user(userptr + off -+ + offsetof(struct ipt_entry, ip.flags), -+ &flags, sizeof(flags)) != 0) { -+ ret = -EFAULT; -+ goto free_counters; -+ } -+ - for (i = sizeof(struct ipt_entry); - i < e->target_offset; - i += m->u.match_size) { -@@ -1228,12 +1265,15 @@ compat_copy_entry_to_user(struct ipt_ent - compat_uint_t origsize; - const struct xt_entry_match *ematch; - int ret = 0; -+ u8 flags = e->ip.flags & IPT_F_MASK; - - origsize = *size; - ce = *dstptr; - if (copy_to_user(ce, e, sizeof(struct ipt_entry)) != 0 || - copy_to_user(&ce->counters, &counters[i], -- sizeof(counters[i])) != 0) -+ sizeof(counters[i])) != 0 || -+ copy_to_user(&ce->ip.flags, &flags, -+ sizeof(flags)) != 0) - return -EFAULT; - - *dstptr += sizeof(struct compat_ipt_entry); |