netlink_delinearize: release expressions in context registers

netlink_release_registers() needs to go a bit further to release the
expressions in the register array. This should be safe since
netlink_get_register() clones expressions in the context registers.

Reported-by: Václav Zindulka <vaclav.zindulka@tlapnet.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/netlink.h b/include/netlink.h
index a20ebbe4..0c08b1ab 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -14,12 +14,14 @@
 
 #include <rule.h>
 
+#define MAX_REGS	(1 + NFT_REG32_15 - NFT_REG32_00)
+
 struct netlink_parse_ctx {
 	struct list_head	*msgs;
 	struct table		*table;
 	struct rule		*rule;
 	struct stmt		*stmt;
-	struct expr		*registers[1 + NFT_REG32_15 - NFT_REG32_00 + 1];
+	struct expr		*registers[MAX_REGS + 1];
 	unsigned int		debug_mask;
 };