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From 8cb078a2f9f69259325c10f479c198349ef01ef2 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Wed, 6 Oct 2021 17:24:44 +0200
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Subject: [PATCH] parser_json: Fix error reporting for invalid syntax
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1994141
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Upstream Status: nftables commit 9fe5d1bc18cfa
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commit 9fe5d1bc18cfaed2ecf717e3dd9a97ff5b0e183c
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Author: Phil Sutter <phil@nwl.cc>
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Date: Wed Sep 1 16:41:44 2021 +0200
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parser_json: Fix error reporting for invalid syntax
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Errors emitted by the JSON parser caused BUG() in erec_print() due to
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input descriptor values being bogus.
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Due to lack of 'include' support, JSON parser uses a single input
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descriptor only and it lived inside the json_ctx object on stack of
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nft_parse_json_*() functions.
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By the time errors are printed though, that scope is not valid anymore.
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Move the static input descriptor object to avoid this.
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Fixes: 586ad210368b7 ("libnftables: Implement JSON parser")
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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---
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src/parser_json.c | 18 ++++++++----------
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1 file changed, 8 insertions(+), 10 deletions(-)
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diff --git a/src/parser_json.c b/src/parser_json.c
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index a069a89..ef4d4fb 100644
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--- a/src/parser_json.c
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+++ b/src/parser_json.c
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@@ -44,7 +44,6 @@
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#define CTX_F_CONCAT (1 << 8) /* inside concat_expr */
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struct json_ctx {
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- struct input_descriptor indesc;
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struct nft_ctx *nft;
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struct list_head *msgs;
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struct list_head *cmds;
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@@ -107,11 +106,12 @@ static struct stmt *json_parse_stmt(struct json_ctx *ctx, json_t *root);
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/* parsing helpers */
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const struct location *int_loc = &internal_location;
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+static struct input_descriptor json_indesc;
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static void json_lib_error(struct json_ctx *ctx, json_error_t *err)
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{
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struct location loc = {
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- .indesc = &ctx->indesc,
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+ .indesc = &json_indesc,
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.line_offset = err->position - err->column,
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.first_line = err->line,
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.last_line = err->line,
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@@ -3864,16 +3864,15 @@ int nft_parse_json_buffer(struct nft_ctx *nft, const char *buf,
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struct list_head *msgs, struct list_head *cmds)
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{
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struct json_ctx ctx = {
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- .indesc = {
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- .type = INDESC_BUFFER,
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- .data = buf,
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- },
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.nft = nft,
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.msgs = msgs,
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.cmds = cmds,
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};
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int ret;
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+ json_indesc.type = INDESC_BUFFER;
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+ json_indesc.data = buf;
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+
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parser_init(nft, nft->state, msgs, cmds, nft->top_scope);
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nft->json_root = json_loads(buf, 0, NULL);
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if (!nft->json_root)
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@@ -3892,10 +3891,6 @@ int nft_parse_json_filename(struct nft_ctx *nft, const char *filename,
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struct list_head *msgs, struct list_head *cmds)
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{
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struct json_ctx ctx = {
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- .indesc = {
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- .type = INDESC_FILE,
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- .name = filename,
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- },
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.nft = nft,
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.msgs = msgs,
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.cmds = cmds,
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@@ -3903,6 +3898,9 @@ int nft_parse_json_filename(struct nft_ctx *nft, const char *filename,
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json_error_t err;
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int ret;
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+ json_indesc.type = INDESC_FILE;
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+ json_indesc.name = filename;
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+
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parser_init(nft, nft->state, msgs, cmds, nft->top_scope);
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nft->json_root = json_load_file(filename, 0, &err;;
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if (!nft->json_root)
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--
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2.31.1
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