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Re: [Qemu-devel] [PATCH 44/56] json: Fix latent parser aborts at end of


From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH 44/56] json: Fix latent parser aborts at end of input
Date: Thu, 16 Aug 2018 08:10:25 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

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?


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>

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org



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