MarcoFalke

89 posts

MarcoFalke

MarcoFalke

@MarcoFalke

Bitcoin minimalist, Fuzzing

Malmö, Sweden 🇸🇪 Katılım Ocak 2016
236 Takip Edilen5.5K Takipçiler
MarcoFalke retweetledi
Michael Ford
Michael Ford@fanquake·
This ultimately resulted in a change to GCC (thanks @MarcoFalke), which we’ll backport to the GCC we use to compile releases.
Michael Ford tweet media
Michael Ford@fanquake

Another case of cross-architecture non-determinism. Running a Windows cross-compiler, on x86_64 and aarch64, produces this difference in assembly, from the following (minified) code. Running on riscv matches x86_64. Noticed while updating our release compiler from GCC 13 to 14.

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DuckDuckGo
DuckDuckGo@DuckDuckGo·
We're proud to donate $1.1M to a diverse group of organizations around the world that promote privacy, digital rights, access to information online, and a healthier online ecosystem. This is made possible through your support of DuckDuckGo—thank you! 🎉 spreadprivacy.com/2024-duckduckg…
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Cøbra
Cøbra@CobraBitcoin·
The Bitcoin Whitepaper is now available for people in the UK to read freely once again. The default judgement obtained fraudulently by Craig Wright has been overturned. Thank you to everyone who helped. Bitcoin: A Peer-to-Peer Electronic Cash System bitcoin.org/bitcoin.pdf
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Ava Chow
Ava Chow@achow101·
Thanks for all the kind messages and tweets I've seen and received over the past 2 days. It's wonderful to see in action how Bitcoin is for anyone. For those of you calling for my head or telling me to stop being involved in Bitcoin, go fuck yourself.
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Mullvad.net
Mullvad.net@mullvadnet·
@mer__edith @Snowden In the beginning of June, it’s time for the citizens of the European Union to elect new Members of the European Parliament. Vote for candidates who stand up for privacy as a human right! 11/11
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MarcoFalke
MarcoFalke@MarcoFalke·
@jamesob @LLFOURN Any code written in a language that isn't type safe will either have bugs or waste time of code reviewers. (Example: #r1356489861" target="_blank" rel="nofollow noopener">github.com/bitcoin/bitcoi…) I know that mypy exists, but it will never be complete and it seems strictly worse than just using a type-safe language to begin with.
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jamesob
jamesob@jamesob·
@LLFOURN Oops, I guess these are just crazy *type* specifications. My bad.
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jamesob
jamesob@jamesob·
I still think Rust is a bubble that's gonna pop when people realize that for 99% of projects, managing memory isn't necessary or desirable. Go could probably steal a bunch of Rust demand if it introduced the equivalent of the ? error handling mechanism and a basic macro system.
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instagibbs
instagibbs@theinstagibbs·
fuzztesting really is amazing
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MarcoFalke
MarcoFalke@MarcoFalke·
-ftrivial-auto-var-init=pattern in combination with Asan and UBsan may be a better sanitizer than Msan or valgrind, because it can even detect uninitialized memory reads before they are used to take a code branch.
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MarcoFalke
MarcoFalke@MarcoFalke·
@LukeDashjr @github The local ipv4 tests should still be run, as they don't need a publicly routed ipv4.
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MarcoFalke
MarcoFalke@MarcoFalke·
Docker supports ipv6 out of the box now. :) #issuecomment-1690115305" target="_blank" rel="nofollow noopener">github.com/docker/hub-fee… A Bitcoin Core ipv6-only CI system is not far away. Only @github is still stuck on ipv4-only.
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Chaincode Labs
Chaincode Labs@ChaincodeLabs·
We plan to run our next set of no-cost 6 week seminars in Bitcoin Protocol Development and Lighting Protocol Development in September. The application deadline ends Aug 3rd. Spots are limited, apply today. #apply" target="_blank" rel="nofollow noopener">learning.chaincode.com/#apply
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OpenSats
OpenSats@OpenSats·
The LTS program has a longer time horizon than regular grants, geared towards long-term stability for grantees. The first recipient is @MarcoFalke, a long-term maintainer and contributor of Bitcoin Core with thousands of contributions over many years. 🫡 opensats.org/blog/announcin…
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Matt Corallo 🟠
Matt Corallo 🟠@TheBlueMatt·
If you think OSS licenses matter and devs should be free to contribute w/o fear of multi-million-$ SLAPP lawsuits, this case matters. It says bitcoin on the tin, but it’s about all of OSS. And yes it’s really costing millions to defend the MIT license. bitcoindefense.org/our-work/
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Tim Ruffing
Tim Ruffing@real_or_random·
We've seen both recent LLVM and GCC versions heavily "optimize" standard constant-time tricks (e.g. creating bitmasks from booleans) into branches. We use valgrind tests to catch these cases, but I worry that other code bases are affected by recent compiler improvements as well.
Jonas Nick@n1ckler

libsecp256k1 0.3.2 resolves a potential timing sidechannel in ECDH that may occur with the recently released GCC 13 (and possibly future versions). Affected users are strongly encouraged to update. This was discovered using the lib's tests, which can detect certain sidechannels.

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MarcoFalke
MarcoFalke@MarcoFalke·
I am grateful for @Okcoin having supported 3 out of my 7 years as maintainer, and for @paradigm having co-sponsored the last grant.
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MarcoFalke
MarcoFalke@MarcoFalke·
I have been the quality assurance and testing maintainer of Bitcoin Core for about 7 years now. In a challenging decision, I concluded to transition out of my role as maintainer. 🧵
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Keşfet

@macrohead7 @mer__edith @Snowden @alex_pertsev @jamesob @LLFOURN @LukeDashjr @github