027e51f715
ee11a412a537f62aa46e8862678ce2069a2df5b7 Avoid signed integer overflow when loading a mempool.dat file with a malformed time field (practicalswift)
Pull request description:
Avoid signed integer overflow when loading a `mempool.dat` file with a malformed time field.
Avoid the following signed integer overflow:
```
$ xxd -p -r > mempool.dat-crash-1 <<EOF
0100000000000000000000000004000000000000000000000000ffffffff
ffffff7f00000000000000000000000000
EOF
$ cp mempool.dat-crash-1 ~/.bitcoin/regtest/mempool.dat
$ UBSAN_OPTIONS="print_stacktrace=1:halt_on_error=1:report_error_type=1" src/bitcoind -regtest
validation.cpp:5079:23: runtime error: signed integer overflow: 9223372036854775807 + 1209600 cannot be represented in type 'long'
#0 0x5618d335197f in LoadMempool(CTxMemPool&) src/validation.cpp:5079:23
#1 0x5618d3350df3 in CChainState::LoadMempool(ArgsManager const&) src/validation.cpp:4217:9
#2 0x5618d2b9345f in ThreadImport(ChainstateManager&, std::vector<boost::filesystem::path, std::allocator<boost::filesystem::path> >, ArgsManager const&) src/init.cpp:762:33
#3 0x5618d2b92162 in AppInitMain(util::Ref const&, NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_14::operator()() const src/init.cpp:1881:9
```
This PR was broken out from PR #20089. Hopefully this PR is trivial to review.
Fixes a subset of #19278.
ACKs for top commit:
MarcoFalke:
review ACK ee11a412a537f62aa46e8862678ce2069a2df5b7
Crypt-iQ:
crACK ee11a412a537f62aa46e8862678ce2069a2df5b7
Tree-SHA512: 227ab95cd7d22f62f3191693b455eacfa8e36534961bee12c622fc9090957cfb29992eabafa74d806a336e03385aa8f98b7ce734f04b0b400e33aa187d353337
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