On Mon, 22 May 2023 at 22:11, Will Deacon will@kernel.org wrote:
Naresh,
On Tue, May 16, 2023 at 02:44:49PM +0100, Will Deacon wrote:
On Tue, May 16, 2023 at 11:58:40AM +0530, Naresh Kamboju wrote:
Following kernel BUG noticed while running selftests arm64 fp-stress running stable rc kernel versions 6.1.29-rc1 and 6.3.3-rc1.
Is there a known-good build so that we could attempt a bisection?
FWIW, I've been trying (and failing) all day to reproduce this in QEMU. I matched the same VL configuration as you have in the fastmodel and tried enabling additional memory debugging options too, but I'm yet to see a kfence splat (or any other splat fwiw).
Thanks for trying it out. I have shared log [Log link] below on Linux next-20230314 which is the starting point of BUG that we started noticing and that is raw log showing FVP log with all -C details.
How often do you see this?
Our CI system running selftests: arm64 - subtests by using ./run_kselftest.sh -c arm64
With full selftests: arm64 the probability of occurrence is 40%.
On Linux next this fp-stress BUG: has been happening *intermittently* from next-20230314 dated March 14, 2023. On Linux stable-rc it started happening on 6.3.2-rc1 and 6.1.28-rc2.
More details (on previous email), - https://lore.kernel.org/all/CA+G9fYtZjGomLjDi+Vf-hdcLpKPKbPmn4nwoPXvn24SG2hE...
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230314/tes... 9588df685892e898be8969def31c5aa074b2faada33f12ebc88fd7e7b52893cd/details/
Log link: - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230314/tes...
Will