On Sat, Aug 17, 2024 at 2:13 AM Gatlin Newhouse <gatlin.newhouse@xxxxxxxxx> wrote: > > To test this patch: I started from v6.11-rc3 tag and applied the new version of > Miguel's RUSTC_VERSION_TEXT patch [1] and the Support Arrays in Target JSON > patch [2], before applying this patch. I am on Rust's beta channel and > Clang/LLVM 19. > > I also built a v6.11-rc3 kernel without these patches to establish a baseline > for LKDTM output in dmesg when testing CFI [3]. I built the v6.11-rc3 kernel by > starting with an x86_64_defconfig, then enabling CFI_CLANG, CFI_PERMISSIVE, and > LKDTM. > > When applying [1], there was an patch does not apply error. I had to manually > change the init/Kconfig RUSTC_VERSION_TEXT to Miguel's change in [1]. No issues > encountered applying [2] afterwards. Similarly, was able to automerge this > patch without any issues. > > Then I built the kernel starting with x86_64_defconfig and enabling: RUST, > CFI_CLANG, CFI_ICALL_NORMALIZE_INTEGERS, CFI_PERMISSIVE and LKDTM. Compiled the > kernel, load into qemu with Busybox rootfs, test CFI within LKDTM per Kees's > blog [3]. I saw the same expected behavior from LKDTM after applying these > patches when compared with the behavior from LKDTM on a v6.11-rc3 build without > these patches. > > Link: https://lore.kernel.org/lkml/20240808221138.873750-1-ojeda@xxxxxxxxxx/ [1] > Link: https://lore.kernel.org/all/20240730-target-json-arrays-v1-1-2b376fd0ecf4@xxxxxxxxxx/ [2] > Link: https://outflux.net/blog/archives/2019/11/20/experimenting-with-clang-cfi-on-upstream-linux/ [3] > > Tested-by: Gatlin Newhouse <gatlin.newhouse@xxxxxxxxx> I wanted to point out that this is an excellent testing report. Cheers, Miguel
