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Catch more possible instances of passing NULL to memcpy.

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Actually fixes #1976.
This commit is contained in:
Shea Levy 2018-03-14 23:53:43 -04:00
parent d25d9f7cec
commit cfdbfa6b2c
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GPG key ID: 5C0BD6957D86FE27
3 changed files with 10 additions and 4 deletions
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12
src/libexpr/primops.cc
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@ -1601,12 +1601,16 @@ static void prim_partition(EvalState & state, const Pos & pos, Value * * args, V
state.mkAttrs(v, 2);
Value * vRight = state.allocAttr(v, state.sRight);
state.mkList(*vRight, right.size());
memcpy(vRight->listElems(), right.data(), sizeof(Value *) * right.size());
auto rsize = right.size();
state.mkList(*vRight, rsize);
if (rsize)
memcpy(vRight->listElems(), right.data(), sizeof(Value *) * rsize);
Value * vWrong = state.allocAttr(v, state.sWrong);
state.mkList(*vWrong, wrong.size());
memcpy(vWrong->listElems(), wrong.data(), sizeof(Value *) * wrong.size());
auto wsize = wrong.size();
state.mkList(*vWrong, wsize);
if (wsize)
memcpy(vWrong->listElems(), wrong.data(), sizeof(Value *) * wsize);
v.attrs->sort();
}

1
src/libstore/download.cc
View file

@ -195,6 +195,7 @@ struct CurlDownloader : public Downloader
if (readOffset == request.data->length())
return 0;
auto count = std::min(size * nitems, request.data->length() - readOffset);
assert(count);
memcpy(buffer, request.data->data() + readOffset, count);
readOffset += count;
return count;

1
src/libutil/hash.cc
View file

@ -191,6 +191,7 @@ Hash::Hash(const std::string & s, HashType type)
auto d = base64Decode(std::string(s, pos));
if (d.size() != hashSize)
throw BadHash("invalid base-64 hash '%s'", s);
assert(hashSize);
memcpy(hash, d.data(), hashSize);
}