Messages in this thread | | | Date | Thu, 21 Oct 2021 10:27:10 +0000 | From | Alexander Lobakin <> | Subject | Re: [PATCH v5 00/15] x86: Add support for Clang CFI |
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From: Sami Tolvanen <samitolvanen@google.com> Date: Wed, 13 Oct 2021 11:16:43 -0700
> This series adds support for Clang's Control-Flow Integrity (CFI) > checking to x86_64. With CFI, the compiler injects a runtime > check before each indirect function call to ensure the target is > a valid function with the correct static type. This restricts > possible call targets and makes it more difficult for an attacker > to exploit bugs that allow the modification of stored function > pointers. For more details, see: > > https://clang.llvm.org/docs/ControlFlowIntegrity.html > > Note that v5 is based on tip/master. The first two patches contain > objtool support for CFI, the remaining patches change function > declarations to use opaque types, fix type mismatch issues that > confuse the compiler, and disable CFI where it can't be used. > > You can also pull this series from > > https://github.com/samitolvanen/linux.git x86-cfi-v5
[ snip ]
I've been using it since the end of May on my x86_64, so for v5 (with changing retpoline thunks prototypes to opaque):
Reviwed-by: Alexander Lobakin <alobakin@pm.me> Tested-by: Alexander Lobakin <alobakin@pm.me>
Thanks! Al
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