net processing: clamp PeerManager::Options user input #28149
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glozow
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Jul 25, 2023
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utACK 128ad03792cd4aeeaf32807d07f01e3f85adaf28
Thanks for the followup
Also changes max_extra_txs into a uint32_t to avoid platform-specific behaviour
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dergoegge
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Aug 7, 2023
maflcko
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Aug 7, 2023
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| if (auto value{argsman.GetIntArg("-maxorphantx")}) { | ||
| options.max_orphan_txs = uint32_t(std::max(int64_t{0}, *value)); | ||
| options.max_orphan_txs = uint32_t((std::clamp<int64_t>(*value, 0, std::numeric_limits<uint32_t>::max()))); |
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unrelated: May be good to write a clang-tidy plugin to enforce the limits are compile-time constants and in range to avoid silent UB at runtime?
The in-range one can be submitted to upstream and the other check can be done in this repo.
maflcko
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Aug 7, 2023
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| if (auto value{argsman.GetIntArg("-maxorphantx")}) { | ||
| options.max_orphan_txs = uint32_t(std::max(int64_t{0}, *value)); | ||
| options.max_orphan_txs = uint32_t((std::clamp<int64_t>(*value, 0, std::numeric_limits<uint32_t>::max()))); |
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Suggested change
| options.max_orphan_txs = uint32_t((std::clamp<int64_t>(*value, 0, std::numeric_limits<uint32_t>::max()))); | |
| options.max_orphan_txs = uint32_t(std::clamp<int64_t>(*value, 0, std::numeric_limits<uint32_t>::max())); |
nit, if you re-touch?
glozow
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Aug 9, 2023
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Fabcien
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Jul 12, 2024
Summary: Document PeerManager::Options members. Clamp -maxorphantx to uint32_t bounds. Clamp -blockreconstructionextratxn to uint32_t bounds. Also changes max_extra_txs into a uint32_t to avoid platform-specific behaviour. -maxaddrtosend is hidden option used only for tests, so we only do minimal boundary checks. This is a backport of [[ bitcoin/bitcoin#28149 | core#28149 ]] Test Plan: `ninja all check-all` Reviewers: #bitcoin_abc, Fabien Reviewed By: #bitcoin_abc, Fabien Differential Revision: https://reviews.bitcoinabc.org/D16456
roqqit
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Summary: Document PeerManager::Options members. Clamp -maxorphantx to uint32_t bounds. Clamp -blockreconstructionextratxn to uint32_t bounds. Also changes max_extra_txs into a uint32_t to avoid platform-specific behaviour. -maxaddrtosend is hidden option used only for tests, so we only do minimal boundary checks. This is a backport of [[ bitcoin/bitcoin#28149 | core#28149 ]] Test Plan: `ninja all check-all` Reviewers: #bitcoin_abc, Fabien Reviewed By: #bitcoin_abc, Fabien Differential Revision: https://reviews.bitcoinabc.org/D16456
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Avoid out-of-bounds user input for
PeerManager::Optionsby safely clamping-maxorphantxand-blockreconstructionextratxn, and avoid platform-specific behaviour by changingPeerManager::Options::max_extra_txsfromsize_tto auint32_t. Addresses #27499 (review).Also documents all
PeerManager::Optionsmembers, addressing #27499 (comment).