[PATCH nft,v2] mnl: fix error rule reporting with missing table/chain and anonymous sets

[PATCH nft,v2] mnl: fix error rule reporting with missing table/chain and anonymous sets

[Pablo Neira Ayuso]

handle_merge() skips handle location initialization because set name != NULL.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7f64f1e in erec_print (octx=0x55555555d2c0, erec=0x55555555fcf0, debug_mask=0) at erec.c:95
95              switch (indesc->type) {
(gdb) bt
    buf=0x55555555db20 "add rule inet traffic-filter input tcp dport { 22, 80, 443 } accept") at libnftables.c:459
(gdb) p indesc
$1 = (const struct input_descriptor *) 0x0

Closes: http://bugzilla.opensuse.org/show_bug.cgi?id=1171321
Fixes: 086ec6f30c96 ("mnl: extended error support for create command")
Reported-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
v2: Fix this from evaluation phas which does not initialize location.

 src/evaluate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/evaluate.c b/src/evaluate.c
index de5f60ec1f4d..a057be5e553a 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -101,6 +101,7 @@ static struct expr *implicit_set_declaration(struct eval_ctx *ctx,
 		handle_merge(&set->handle, &ctx->cmd->handle);
 		memset(&h, 0, sizeof(h));
 		handle_merge(&h, &set->handle);
+		h.set.location = expr->location;
 		cmd = cmd_alloc(CMD_ADD, CMD_OBJ_SET, &h, &expr->location, set);
 		cmd->location = set->location;
 		list_add_tail(&cmd->list, &ctx->cmd->list);
-- 
2.20.1