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LibC: Avoid division by zero in fread()/fwrite()

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Gunnar Beutner 2021-04-19 22:10:11 +02:00 • committed by Andreas Kling
parent 4831dc0e30
commit ddcd149224
1 changed files with 4 additions and 0 deletions
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4
Userland/Libraries/LibC/stdio.cpp
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@ -777,6 +777,8 @@ size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
VERIFY(!Checked<size_t>::multiplication_would_overflow(size, nmemb));
size_t nread = stream->read(reinterpret_cast<u8*>(ptr), size * nmemb);
if (!nread)
return 0;
return nread / size;
}
@ -786,6 +788,8 @@ size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream)
VERIFY(!Checked<size_t>::multiplication_would_overflow(size, nmemb));
size_t nwritten = stream->write(reinterpret_cast<const u8*>(ptr), size * nmemb);
if (!nwritten)
return 0;
return nwritten / size;
}