GrapheneOS / linux-hardened

Minimal supplement to upstream Kernel Self Protection Project changes. Features already provided by SELinux + Yama and archs other than multiarch arm64 / x86_64 aren't in scope. Only tags have stable history. Shared IRC channel with KSPP: irc.freenode.net ##linux-hardened. Currently maintained at https://github.com/anthraxx/linux-hardened.
https://grapheneos.org/
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improve slub canary generation #37

Open thestinger opened 7 years ago

thestinger commented 7 years ago

Ideally this would use a keyed hash, but SipHash is likely too slow. The random ^ canary_address technique doesn't even make each one unique on little endian architectures due to the leading zero.