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Date: Thu, 25 Nov 2021 10:52:00 -0500
From: Rich Felker <dalias@...c.org>
To: "Quesada Gonzalez, Elena" <elena.quesada_gonzalez@...mens.com>
Cc: "musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: Re: SIGSEV error when using REGEX with musl library
On Thu, Nov 25, 2021 at 02:53:13PM +0000, Quesada Gonzalez, Elena wrote:
> I have the following function that works fine if the regular expression is correct, but get a SIGSEGV when calling regex_search compiling with clang-9 and using musl 1.2.
> However, it works fine with glibc,
>
> Could be a bug in musl library?
>
>
> Find code below
>
> void CRuntimeCommandLine::LoadComplement(const multimap<std::string, std::string>& mapArguments)
> {
> // Find parameter
> multimap<string, string>::const_iterator iter;
> iter = mapArguments.find("Complement");
> if(iter == mapArguments.end())
> {
> // Only fatal. Statement is not initialized yet.
> Logger::fatal(Errors::RCMD_F005_MISSING_MANDATORY_PARAM, "Missing mandatory parameter --Complement");
> }
> // regex expression for system_secret to be checked (Max 4Bytes, hexadecimal number in lowe case letters and no 0x format)
> regex regexp("^[0-9a-f]{1,8}$");
>
> // regex_search that searches pattern regexp in the string mystr
> std::string s = iter->second.c_str();
> if (false == std::regex_search(s, regexp))
> {
> // Only fatal. Statement is not initialized yet.
> Logger::fatal(Errors::RCMD_F006_INVALID_VALUE, "Invalid --Complement=hexvalue value");
> }
> else
> {
> // get hexadecimal value
> (void)sscanf(s.c_str(), "%X", &(m_cmdParameters.complementValue));
> }
>
> }
> With kind regards
> Elena Quesada Gonzalez
Do you have a complete minimal-ish test case that can be compiled and
show the same thing happening? Even just a dummy main() to call the
above the way you expect it to be called?
Rich
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