34 lines
1.4 KiB
Diff
34 lines
1.4 KiB
Diff
From 91107fe78a290a7d25a042fec09ea89f14f480d9 Mon Sep 17 00:00:00 2001
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From: xuhuijie <xuhuijie2@huawei.com>
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Date: Wed, 16 Jun 2021 15:47:22 +0800
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Subject: [PATCH] regex: fix dead loop in parse_repea
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There is a bug in parse_repeat(), after deal with comment the
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contin value will be always true. So we enter a dead loop. To deal with this,
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we assign contin to false each time we enter the loop.
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Testcase: boost::regex(std::string("1?+(?#)1"))
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Signed-off-by: Xu Huijie <xuhuijie2@huawei.com>
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---
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boost/regex/v4/basic_regex_parser.hpp | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/boost/regex/v4/basic_regex_parser.hpp b/boost/regex/v4/basic_regex_parser.hpp
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index 6c7065f05..de22f7000 100644
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--- a/boost/regex/v4/basic_regex_parser.hpp
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+++ b/boost/regex/v4/basic_regex_parser.hpp
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@@ -1080,9 +1080,10 @@ bool basic_regex_parser<charT, traits>::parse_repeat(std::size_t low, std::size_
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// Check for illegal following quantifier, we have to do this here, because
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// the extra states we insert below circumvents our usual error checking :-(
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//
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- bool contin = false;
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+ bool contin;
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do
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{
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+ contin = false;
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if ((this->flags() & (regbase::main_option_type | regbase::mod_x | regbase::no_perl_ex)) == regbase::mod_x)
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{
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// whitespace skip:
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--
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2.23.0
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