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Fix writing into closed socket from streambuf

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In case of error occured in writeToDevice pptr may become one byte
farther than epptr. This can lead to crash in streambuf::xsputn from
libstdc++.
This commit is contained in:
Ilya Lyubimov
2017-10-10 19:03:19 +03:00
parent 94e9f2eec2
commit c3d6fb94cc
2 changed files with 4 additions and 4 deletions
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4
Foundation/include/Poco/BufferedBidirectionalStreamBuf.h
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@@ -73,12 +73,12 @@ public:
{
if (!(_mode & IOS::out)) return char_traits::eof();
if (flushBuffer() == std::streamsize(-1)) return char_traits::eof();
if (c != char_traits::eof())
{
*this->pptr() = char_traits::to_char_type(c);
this->pbump(1);
}
if (flushBuffer() == std::streamsize(-1)) return char_traits::eof();
return c;
}
@@ -127,7 +127,7 @@ protected:
void resetBuffers()
{
this->setg(_pReadBuffer + 4, _pReadBuffer + 4, _pReadBuffer + 4);
this->setp(_pWriteBuffer, _pWriteBuffer + (_bufsize - 1));
this->setp(_pWriteBuffer, _pWriteBuffer + _bufsize);
}
private: