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From 1f08301adf98c235ccc4e978f809c3f60833452c Mon Sep 17 00:00:00 2001
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From: Markus Armbruster <armbru@redhat.com>
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Date: Wed, 27 Jul 2016 07:35:00 +0200
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Subject: [PATCH 02/16] qjson: Apply nesting limit more sanely
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RH-Author: Markus Armbruster <armbru@redhat.com>
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Message-id: <1469604913-12442-4-git-send-email-armbru@redhat.com>
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Patchwork-id: 71468
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O-Subject: [RHEL-7.3 qemu-kvm PATCH v2 02/15] qjson: Apply nesting limit more sanely
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Bugzilla: 1276036
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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The nesting limit from commit 29c75dd "json-streamer: limit the
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maximum recursion depth and maximum token count" applies separately to
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braces and brackets. This makes no sense. Apply it to their sum,
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because that's actually a measure of recursion depth.
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Message-Id: <1448486613-17634-2-git-send-email-armbru@redhat.com>
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(cherry picked from commit 4f2d31fbc0bfdf41feea7d1be49f4f7ffa005534)
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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qobject/json-streamer.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/qobject/json-streamer.c b/qobject/json-streamer.c
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index 1b2f9b1..dced2c7 100644
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--- a/qobject/json-streamer.c
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+++ b/qobject/json-streamer.c
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@@ -64,8 +64,7 @@ static void json_message_process_token(JSONLexer *lexer, QString *token, JSONTok
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parser->bracket_count == 0)) {
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goto out_emit;
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} else if (parser->token_size > MAX_TOKEN_SIZE ||
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- parser->bracket_count > MAX_NESTING ||
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- parser->brace_count > MAX_NESTING) {
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+ parser->bracket_count + parser->brace_count > MAX_NESTING) {
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/* Security consideration, we limit total memory allocated per object
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* and the maximum recursion depth that a message can force.
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*/
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--
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1.8.3.1
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