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 <dannf@dannf.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 893669c..9707079 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1766,7 +1766,7 @@
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 @@
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 a9adf4c..8a025a5 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -455,6 +455,7 @@
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 @@
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);