Re: [PATCH 6.5 000/550] 6.5.12-rc1 review

[Naresh Kamboju]

+ kunit team

On Thu, 16 Nov 2023 at 05:30, Daniel Díaz <daniel.diaz@xxxxxxxxxx> wrote:
>
> Hello!
>
> On Wed, 15 Nov 2023 at 15:38, Daniel Díaz <daniel.diaz@xxxxxxxxxx> wrote:
> > On Wed, 15 Nov 2023 at 13:20, Greg Kroah-Hartman
> > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > > This is the start of the stable review cycle for the 6.5.12 release.
> > > There are 550 patches in this series, all will be posted as a response
> > > to this one.  If anyone has any issues with these being applied, please
> > > let me know.
> > >
> > > Responses should be made by Fri, 17 Nov 2023 19:14:03 +0000.
> > > Anything received after that time might be too late.
> > >
> > > The whole patch series can be found in one patch at:
> > >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.5.12-rc1.gz
> > > or in the git tree and branch at:
> > >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.5.y
> > > and the diffstat can be found below.
> > >
> > > thanks,
> > >
> > > greg k-h
> >
> > We're seeing build regressions on Arm, Arm64, i386, x86, with KUnit
> > defconfigs (and multi_v5_defconfig on Arm32):
> > -----8<-----
> >   In file included from /builds/linux/lib/kunit/executor.c:225:
> >   /builds/linux/lib/kunit/executor_test.c: In function 'free_suite_set':
> >   /builds/linux/lib/kunit/executor_test.c:130:30: error: invalid use
> > of undefined type 'struct kunit_suite_set'
> >     130 |         kunit_free_suite_set(*(struct kunit_suite_set *)suite_set);
> >         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >   /builds/linux/lib/kunit/executor_test.c: In function 'free_suite_set_at_end':
> >   /builds/linux/lib/kunit/executor_test.c:141:49: error: invalid use
> > of undefined type 'struct kunit_suite_set'
> >     141 |         if (!((struct kunit_suite_set *)to_free)->start)
> >         |                                                 ^~
> >   /builds/linux/lib/kunit/executor_test.c:144:31: error: invalid
> > application of 'sizeof' to incomplete type 'struct kunit_suite_set'
> >     144 |         free = kzalloc(sizeof(struct kunit_suite_set), GFP_KERNEL);
> >         |                               ^~~~~~
> >   /builds/linux/lib/kunit/executor_test.c:145:17: error: invalid use
> > of undefined type 'struct kunit_suite_set'
> >     145 |         *free = *(struct kunit_suite_set *)to_free;
> >         |                 ^
> >   /builds/linux/lib/kunit/executor_test.c:145:15: error: invalid use
> > of undefined type 'struct kunit_suite_set'
> >     145 |         *free = *(struct kunit_suite_set *)to_free;
> >         |               ^
> >   make[5]: *** [/builds/linux/scripts/Makefile.build:243:
> > lib/kunit/executor.o] Error 1
> > ----->8-----
> >
> > This is with defconfig, CONFIG_KASAN=y, CONFIG_KUNIT=y, and
> > CONFIG_KUNIT_ALL_TESTS=y. To reproduce,
> >
> > tuxmake \
> >   --runtime podman \
> >   --target-arch arm64 \
> >   --toolchain gcc-13 \
> >   --kconfig defconfig \
> >   --kconfig-add CONFIG_KASAN=y \
> >   --kconfig-add CONFIG_KUNIT=y \
> >   --kconfig-add CONFIG_KUNIT_ALL_TESTS=y
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> >
> > Bisection is on-going.

Thanks Daniel for bisecting this.

> Bisection points to 3aed6e0618a9 ("kunit: test: Fix the possible
> memory leak in executor_test"), upstream commit
> 8040345fdae4cb256c5d981f91ae0f22bea8adcc. Reverting this commit brings
> happiness back to the build.
>
> This problem is not observed on other branches.

stable-rc linux-6.6.y - kunit build pass
stable-rc linux-6.5.y - kunit build failed

## Test Regressions (compared to v6.5.11)
* arm, build
  - gcc-13-lkftconfig-kunit

* arm64, build
  - gcc-13-lkftconfig-kunit


>
> Greetings!
>
> Daniel Díaz
> daniel.diaz@xxxxxxxxxx

- Naresh