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[Qemu-devel] [PULL 44/58] json: Fix latent parser aborts at end of input
From: |
Markus Armbruster |
Subject: |
[Qemu-devel] [PULL 44/58] json: Fix latent parser aborts at end of input |
Date: |
Fri, 24 Aug 2018 21:31:52 +0200 |
json-parser.c carefully reports end of input like this:
token = parser_context_pop_token(ctxt);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
Except parser_context_pop_token() can't return null, it fails its
assertion instead. Same for parser_context_peek_token(). Broken in
commit 65c0f1e9558, and faithfully preserved in commit 95385fe9ace.
Only a latent bug, because the streamer throws away any input that
could trigger it.
Drop the assertions, so we can fix the streamer in the next commit.
Signed-off-by: Markus Armbruster <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Message-Id: <address@hidden>
---
qobject/json-parser.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/qobject/json-parser.c b/qobject/json-parser.c
index 27e873ad3b..e3ee2a273a 100644
--- a/qobject/json-parser.c
+++ b/qobject/json-parser.c
@@ -226,14 +226,12 @@ out:
static JSONToken *parser_context_pop_token(JSONParserContext *ctxt)
{
g_free(ctxt->current);
- assert(!g_queue_is_empty(ctxt->buf));
ctxt->current = g_queue_pop_head(ctxt->buf);
return ctxt->current;
}
static JSONToken *parser_context_peek_token(JSONParserContext *ctxt)
{
- assert(!g_queue_is_empty(ctxt->buf));
return g_queue_peek_head(ctxt->buf);
}
--
2.17.1
- [Qemu-devel] [PULL 26/58] json: Leave rejecting invalid escape sequences to parser, (continued)
- [Qemu-devel] [PULL 26/58] json: Leave rejecting invalid escape sequences to parser, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 18/58] json: Reject unescaped control characters, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 40/58] json: Leave rejecting invalid interpolation to parser, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 36/58] json: Don't create JSON_ERROR tokens that won't be used, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 32/58] json-parser: simplify and avoid JSONParserContext allocation, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 58/58] json: Update references to RFC 7159 to RFC 8259, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 42/58] json: Improve names of lexer states related to numbers, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 57/58] json: Support %% in JSON strings when interpolating, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 45/58] json: Fix streamer not to ignore trailing unterminated structures, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 55/58] json: Keep interpolation state in JSONParserContext, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 44/58] json: Fix latent parser aborts at end of input,
Markus Armbruster <=
- [Qemu-devel] [PULL 51/58] json: Make JSONToken opaque outside json-parser.c, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 41/58] json: Replace %I64d, %I64u by %PRId64, %PRIu64, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 38/58] json: Treat unwanted interpolation as lexical error, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 56/58] json: Improve safety of qobject_from_jsonf_nofail() & friends, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 53/58] json: Clean up headers, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 46/58] json: Assert json_parser_parse() consumes all tokens on success, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 47/58] qjson: Have qobject_from_json() & friends reject empty and blank, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 50/58] json: Unbox tokens queue in JSONMessageParser, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 48/58] json: Enforce token count and size limits more tightly, Markus Armbruster, 2018/08/24
- [Qemu-devel] [PULL 49/58] json: Streamline json_message_process_token(), Markus Armbruster, 2018/08/24