Messages in this thread | ![/](/images/icornerl.gif) | | From | Sami Tolvanen <> | Date | Wed, 4 May 2022 13:17:25 -0700 | Subject | Re: [RFC PATCH 00/21] KCFI support |
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On Wed, May 4, 2022 at 9:41 AM Sami Tolvanen <samitolvanen@google.com> wrote: > > Hi Mark, > > On Wed, May 4, 2022 at 9:18 AM Mark Rutland <mark.rutland@arm.com> wrote: > > I wanted to give this a spin on arm64, but I'm seeing some very odd toolchain > > behaviour. I'm not sure if I've done something wrong, or if I'm just hitting an > > edge-case, but it looks like using -fsanitize=kcfi causes the toolchain to hit > > out-of-memory errors and other issues which look like they could be memory > > corruption. > > Thanks for the detailed bug report! It definitely looks like something > is wrong with the recent switch from std::string to Twine in the Clang > code. I didn't see this issue when compiling the arm64 kernel, but > I'll take a closer look and see if I can reproduce it.
I was able to reproduce this by turning off assertions in Clang. It seems to work fine with -DLLVM_ENABLE_ASSERTIONS=ON. I'll go fix.
Sami
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