[PATCH nft] libnftables: keep evaluating until parser_max_errors

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

Bail out after parser_max_errors has been reached, eg.

 # nft -f /tmp/errors.nft
 /tmp/errors.nft:1:23-23: Error: syntax error, unexpected newline
 filter input tcp dport
                      ^
 /tmp/errors.nft:2:24-26: Error: datatype mismatch, expected internet network service, expression has type Internet protocol
 filter input tcp dport tcp
             ~~~~~~~~~ ^^^
 root@salvia:/home/pablo# nft -f /tmp/errors.nft
 /tmp/errors.nft:1:23-23: Error: syntax error, unexpected newline
 filter input tcp dport
                      ^
 /tmp/errors.nft:2:24-26: Error: datatype mismatch, expected internet network service, expression has type Internet protocol
 filter input tcp dport tcp
             ~~~~~~~~~ ^^^
 /tmp/errors.nft:3:24-26: Error: datatype mismatch, expected internet network service, expression has type Internet protocol
 filter input tcp sport udp
             ~~~~~~~~~ ^^^

Fixes: f211921e25e6 ("src: perform evaluation after parsing")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
 src/libnftables.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libnftables.c b/src/libnftables.c
index eae78e8be9d7..e9dc03cf2909 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -393,7 +393,8 @@ static int nft_evaluate(struct nft_ctx *nft, struct list_head *msgs,
 			.nft	= nft,
 			.msgs	= msgs,
 		};
-		if (cmd_evaluate(&ectx, cmd) < 0)
+		if (cmd_evaluate(&ectx, cmd) < 0 &&
+		    ++nft->state->nerrs == nft->parser_max_errors)
 			return -1;
 	}
 
-- 
2.11.0