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Re: [Qemu-devel] [PATCH 44/56] json: Fix latent parser aborts at end of
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH 44/56] json: Fix latent parser aborts at end of input |
Date: |
Thu, 16 Aug 2018 17:19:21 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
Eric Blake <address@hidden> writes:
> On 08/08/2018 07:03 AM, Markus Armbruster wrote:
>> 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;
>> }
>
> Are the TABs in the commit message intentional?
No. Suspect a paste accident. Fixing...
>> 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>
>> ---
>> qobject/json-parser.c | 2 --
>> 1 file changed, 2 deletions(-)
>
> Reviewed-by: Eric Blake <address@hidden>
Thanks!
- Re: [Qemu-devel] [PATCH 24/56] json: Accept overlong \xC0\x80 as U+0000 ("modified UTF-8"), (continued)
[Qemu-devel] [PATCH 28/56] json: Fix \uXXXX for surrogate pairs, Markus Armbruster, 2018/08/08
[Qemu-devel] [PATCH 44/56] json: Fix latent parser aborts at end of input, Markus Armbruster, 2018/08/08
[Qemu-devel] [PATCH 20/56] check-qjson: Document we expect invalid UTF-8 to be rejected, Markus Armbruster, 2018/08/08
[Qemu-devel] [PATCH 52/56] json: Eliminate lexer state IN_WHITESPACE, pseudo-token JSON_SKIP, Markus Armbruster, 2018/08/08
[Qemu-devel] [PATCH 48/56] json: Enforce token count and size limits more tightly, Markus Armbruster, 2018/08/08
[Qemu-devel] [PATCH 11/56] check-qjson: Cover UTF-8 in single quoted strings, Markus Armbruster, 2018/08/08