Re: BUG : PowerPC RCU: torture test failed with __stack_chk_fail

On Tue, Apr 25, 2023 at 6:07 AM Michael Ellerman [off-list ref] wrote:

Zhouyi Zhou [off-list ref] writes:

quoted

Dear PowerPC and RCU developers:
During the RCU torture test on mainline (on the VM of Opensource Lab
of Oregon State University), SRCU-P failed with __stack_chk_fail:

...

quoted

by debugging, I see the r10 is assigned with r13 on c000000000226eb4,
but if there is a context-switch before c000000000226edc, a false
positive will be reported.

[1] http://154.220.3.115/logs/0422/configformainline.txt

Says:

CONFIG_CC_VERSION_TEXT="powerpc64le-linux-gnu-gcc-10 (Ubuntu 10.4.0-4ubuntu1~22.04) 10.4.0"

Do you see the same issue with a newer GCC?

I would like to try that in the newest GCC ;-), please give me about a
day's time because I am going to compile the gcc ;-)

There's 12.2.0 here:
  https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/12.2.0/
  https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/ppc64le/12.2.0/

Or if you can build in a Fedora 38 system or container, it has GCC 13.

OK, I will try it or similar

This is a very learningful process for me, thank you all ;-)

Cheers

cheers