Regressions noticed while building arm builds with gcc-13 and gcc-8 toolchains on the Linux next-20250723 to next-20250725 tags.
First seen on the Linux next-20250723 Good: next-20250722 Bad: next-20250723 and next-20250725
Regression Analysis: - New regression? Yes - Reproducibility? Yes
## Build regressions * arm, build - gcc-13-lkftconfig-hardening - gcc-8-lkftconfig-hardening
Build regression: next-20250723 arm atags_to_fdt.c undefined reference to `__sanitizer_cov_stack_depth'
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
## Build log arm-linux-gnueabihf-ld: arch/arm/boot/compressed/atags_to_fdt.o: in function `atags_to_fdt': arch/arm/boot/compressed/atags_to_fdt.c:135:(.text+0x118): undefined reference to `__sanitizer_cov_stack_depth'
## Source * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git * Project: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250725/ * Git sha: d7af19298454ed155f5cf67201a70f5cf836c842 * Git describe: 6.16.0-rc7-next-20250725 * kernel version: next-20250723 next-20250725 * Architectures: arm * Toolchains: gcc-8 gcc-13 * Kconfigs: hardening
## Test * Test log: https://qa-reports.linaro.org/api/testruns/29244662/log_file/ * Test details: https://regressions.linaro.org/lkft/linux-next-master/next-20250725/log-pars... * Test history: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250725/tes... * Test plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/30LiHIefap... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/30LiHIefapv5cGlikeKrT... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/30LiHIefapv5cGlikeKrT...
## steps to reproduce * tuxmake --runtime podman --target-arch arm --toolchain gcc-13 \ --kconfig defconfig --kconfig-add https://gitlab.com/Linaro/lkft/kernel-fragments/-/raw/main/netdev.config \ --kconfig-add https://gitlab.com/Linaro/lkft/kernel-fragments/-/raw/main/systemd.config \ --kconfig-add CONFIG_ARM_LPAE=y \ --kconfig-add hardening.config
-- Linaro LKFT https://lkft.linaro.org
On Fri, Jul 25, 2025 at 01:59:02PM +0530, Naresh Kamboju wrote:
Regressions noticed while building arm builds with gcc-13 and gcc-8 toolchains on the Linux next-20250723 to next-20250725 tags.
First seen on the Linux next-20250723 Good: next-20250722 Bad: next-20250723 and next-20250725
Regression Analysis:
- New regression? Yes
- Reproducibility? Yes
## Build regressions
- arm, build
- gcc-13-lkftconfig-hardening
- gcc-8-lkftconfig-hardening
Build regression: next-20250723 arm atags_to_fdt.c undefined reference to `__sanitizer_cov_stack_depth'
"cov" suggests "coverty", and that the symbol is not available in the kernel suggests that coverty isn't supported.
Maybe some kind of new support has been added, but no one has told the arm developers, and thus bits needed for it aren't present.
Honestly, I'm not going to worry about it. If someone wishes to contribute 32-bit arm support, then fine, otherwise I'll just ignore this.
On Fri, Jul 25, 2025 at 10:07:24AM +0100, Russell King (Oracle) wrote:
On Fri, Jul 25, 2025 at 01:59:02PM +0530, Naresh Kamboju wrote:
Regressions noticed while building arm builds with gcc-13 and gcc-8 toolchains on the Linux next-20250723 to next-20250725 tags.
First seen on the Linux next-20250723 Good: next-20250722 Bad: next-20250723 and next-20250725
Regression Analysis:
- New regression? Yes
- Reproducibility? Yes
## Build regressions
- arm, build
- gcc-13-lkftconfig-hardening
- gcc-8-lkftconfig-hardening
Build regression: next-20250723 arm atags_to_fdt.c undefined reference to `__sanitizer_cov_stack_depth'
"cov" suggests "coverty", and that the symbol is not available in the kernel suggests that coverty isn't supported.
This is the coverage sanitizer and related to my changes. Sorry! This didn't show up in my build testing, I'll reproduce it and get it fixed.
-
Kees Cook -
Naresh Kamboju -
Russell King (Oracle)