Errors emitted by the JSON parser caused BUG() in erec_print() due to
input descriptor values being bogus.
Due to lack of 'include' support, JSON parser uses a single input
descriptor only and it lived inside the json_ctx object on stack of
nft_parse_json_*() functions.
By the time errors are printed though, that scope is not valid anymore.
Move the static input descriptor object to avoid this.
Fixes: 586ad210368b7 ("libnftables: Implement JSON parser")
Signed-off-by: Phil Sutter <phil@xxxxxx>
---
src/parser_json.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/src/parser_json.c b/src/parser_json.c
index 666aa2fcc9ec3..3cd21175b2364 100644
--- a/src/parser_json.c
+++ b/src/parser_json.c
@@ -44,7 +44,6 @@
#define CTX_F_CONCAT (1 << 8) /* inside concat_expr */
struct json_ctx {
- struct input_descriptor indesc;
struct nft_ctx *nft;
struct list_head *msgs;
struct list_head *cmds;
@@ -107,11 +106,12 @@ static struct stmt *json_parse_stmt(struct json_ctx *ctx, json_t *root);
/* parsing helpers */
const struct location *int_loc = &internal_location;
+static struct input_descriptor json_indesc;
static void json_lib_error(struct json_ctx *ctx, json_error_t *err)
{
struct location loc = {
- .indesc = &ctx->indesc,
+ .indesc = &json_indesc,
.line_offset = err->position - err->column,
.first_line = err->line,
.last_line = err->line,
@@ -3923,16 +3923,15 @@ int nft_parse_json_buffer(struct nft_ctx *nft, const char *buf,
struct list_head *msgs, struct list_head *cmds)
{
struct json_ctx ctx = {
- .indesc = {
- .type = INDESC_BUFFER,
- .data = buf,
- },
.nft = nft,
.msgs = msgs,
.cmds = cmds,
};
int ret;
+ json_indesc.type = INDESC_BUFFER;
+ json_indesc.data = buf;
+
parser_init(nft, nft->state, msgs, cmds, nft->top_scope);
nft->json_root = json_loads(buf, 0, NULL);
if (!nft->json_root)
@@ -3951,10 +3950,6 @@ int nft_parse_json_filename(struct nft_ctx *nft, const char *filename,
struct list_head *msgs, struct list_head *cmds)
{
struct json_ctx ctx = {
- .indesc = {
- .type = INDESC_FILE,
- .name = filename,
- },
.nft = nft,
.msgs = msgs,
.cmds = cmds,
@@ -3962,6 +3957,9 @@ int nft_parse_json_filename(struct nft_ctx *nft, const char *filename,
json_error_t err;
int ret;
+ json_indesc.type = INDESC_FILE;
+ json_indesc.name = filename;
+
parser_init(nft, nft->state, msgs, cmds, nft->top_scope);
nft->json_root = json_load_file(filename, 0, &err);
if (!nft->json_root)
--
2.33.0
