4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Florian Westphal fw@strlen.de
commit 9782a11efc072faaf91d4aa60e9d23553f918029 upstream.
should have no impact, function still always returns 0. This patch is only to ease review.
Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/linux/netfilter/x_tables.h | 2 +- net/bridge/netfilter/ebtables.c | 10 ++++++++-- net/ipv4/netfilter/arp_tables.c | 10 +++++++--- net/ipv4/netfilter/ip_tables.c | 8 ++++++-- net/ipv6/netfilter/ip6_tables.c | 10 +++++++--- net/netfilter/x_tables.c | 4 +++- 6 files changed, 32 insertions(+), 12 deletions(-)
--- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -510,7 +510,7 @@ void xt_compat_unlock(u_int8_t af);
int xt_compat_add_offset(u_int8_t af, unsigned int offset, int delta); void xt_compat_flush_offsets(u_int8_t af); -void xt_compat_init_offsets(u_int8_t af, unsigned int number); +int xt_compat_init_offsets(u8 af, unsigned int number); int xt_compat_calc_jump(u_int8_t af, unsigned int offset);
int xt_compat_match_offset(const struct xt_match *match); --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1821,10 +1821,14 @@ static int compat_table_info(const struc { unsigned int size = info->entries_size; const void *entries = info->entries; + int ret;
newinfo->entries_size = size;
- xt_compat_init_offsets(NFPROTO_BRIDGE, info->nentries); + ret = xt_compat_init_offsets(NFPROTO_BRIDGE, info->nentries); + if (ret) + return ret; + return EBT_ENTRY_ITERATE(entries, size, compat_calc_entry, info, entries, newinfo); } @@ -2268,7 +2272,9 @@ static int compat_do_replace(struct net
xt_compat_lock(NFPROTO_BRIDGE);
- xt_compat_init_offsets(NFPROTO_BRIDGE, tmp.nentries); + ret = xt_compat_init_offsets(NFPROTO_BRIDGE, tmp.nentries); + if (ret < 0) + goto out_unlock; ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state); if (ret < 0) goto out_unlock; --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -781,7 +781,9 @@ static int compat_table_info(const struc memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries; - xt_compat_init_offsets(NFPROTO_ARP, info->number); + ret = xt_compat_init_offsets(NFPROTO_ARP, info->number); + if (ret) + return ret; xt_entry_foreach(iter, loc_cpu_entry, info->size) { ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); if (ret != 0) @@ -1167,7 +1169,7 @@ static int translate_compat_table(struct struct compat_arpt_entry *iter0; struct arpt_replace repl; unsigned int size; - int ret = 0; + int ret;
info = *pinfo; entry0 = *pentry0; @@ -1176,7 +1178,9 @@ static int translate_compat_table(struct
j = 0; xt_compat_lock(NFPROTO_ARP); - xt_compat_init_offsets(NFPROTO_ARP, compatr->num_entries); + ret = xt_compat_init_offsets(NFPROTO_ARP, compatr->num_entries); + if (ret) + goto out_unlock; /* Walk through entries, checking offsets. */ xt_entry_foreach(iter0, entry0, compatr->size) { ret = check_compat_entry_size_and_hooks(iter0, info, &size, --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -945,7 +945,9 @@ static int compat_table_info(const struc memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries; - xt_compat_init_offsets(AF_INET, info->number); + ret = xt_compat_init_offsets(AF_INET, info->number); + if (ret) + return ret; xt_entry_foreach(iter, loc_cpu_entry, info->size) { ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); if (ret != 0) @@ -1418,7 +1420,9 @@ translate_compat_table(struct net *net,
j = 0; xt_compat_lock(AF_INET); - xt_compat_init_offsets(AF_INET, compatr->num_entries); + ret = xt_compat_init_offsets(AF_INET, compatr->num_entries); + if (ret) + goto out_unlock; /* Walk through entries, checking offsets. */ xt_entry_foreach(iter0, entry0, compatr->size) { ret = check_compat_entry_size_and_hooks(iter0, info, &size, --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -962,7 +962,9 @@ static int compat_table_info(const struc memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries; - xt_compat_init_offsets(AF_INET6, info->number); + ret = xt_compat_init_offsets(AF_INET6, info->number); + if (ret) + return ret; xt_entry_foreach(iter, loc_cpu_entry, info->size) { ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); if (ret != 0) @@ -1425,7 +1427,7 @@ translate_compat_table(struct net *net, struct compat_ip6t_entry *iter0; struct ip6t_replace repl; unsigned int size; - int ret = 0; + int ret;
info = *pinfo; entry0 = *pentry0; @@ -1434,7 +1436,9 @@ translate_compat_table(struct net *net,
j = 0; xt_compat_lock(AF_INET6); - xt_compat_init_offsets(AF_INET6, compatr->num_entries); + ret = xt_compat_init_offsets(AF_INET6, compatr->num_entries); + if (ret) + goto out_unlock; /* Walk through entries, checking offsets. */ xt_entry_foreach(iter0, entry0, compatr->size) { ret = check_compat_entry_size_and_hooks(iter0, info, &size, --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -604,10 +604,12 @@ int xt_compat_calc_jump(u_int8_t af, uns } EXPORT_SYMBOL_GPL(xt_compat_calc_jump);
-void xt_compat_init_offsets(u_int8_t af, unsigned int number) +int xt_compat_init_offsets(u8 af, unsigned int number) { xt[af].number = number; xt[af].cur = 0; + + return 0; } EXPORT_SYMBOL(xt_compat_init_offsets);