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23 lines
736 B
23 lines
736 B
7 years ago
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2016-06-01 Jakub Jelinek <jakub@redhat.com>
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Backported from mainline
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2015-10-02 Jonathan Wakely <jwakely@redhat.com>
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PR libstdc++/65142
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* src/c++11/random.cc (random_device::_M_getval()): Check read result.
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--- libstdc++-v3/src/c++11/random.cc (revision 228423)
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+++ libstdc++-v3/src/c++11/random.cc (revision 228424)
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@@ -126,8 +126,10 @@ namespace std _GLIBCXX_VISIBILITY(defaul
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#endif
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result_type __ret;
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- std::fread(reinterpret_cast<void*>(&__ret), sizeof(result_type),
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- 1, _M_file);
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+ const size_t e = std::fread(reinterpret_cast<void*>(&__ret),
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+ sizeof(result_type), 1, _M_file);
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+ if (e != 1)
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+ std::__throw_runtime_error(__N("random_device could not be read"));
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return __ret;
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}
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