Received-SPF: pass (google.com: domain of linux-kernel+bounces-200243-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Date: Tue, 4 Jun 2024 11:21:34 +0300
From: Dan Carpenter <dan.carpenter@linaro.org>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: open list <linux-kernel@vger.kernel.org>, kunit-dev@googlegroups.com,
	lkft-triage@lists.linaro.org,
	Linux Regressions <regressions@lists.linux.dev>, smayhew@redhat.com,
	David Gow <davidgow@google.com>, Rae Moar <rmoar@google.com>,
	Ivan Orlov <ivan.orlov0322@gmail.com>, npache@redhat.com,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: kunit_test: KASAN: null-ptr-deref in range -
 kunit_generic_run_threadfn_adapter on qemu_arm64
Message-ID: <81d3f794-a19b-4b62-8c21-7c6ef9acb552@moroto.mountain>
References: <CA+G9fYuJtUV_Z4x74qYZDDOkbHP3SJbGvHskFNnsOCxOmPvr=Q@mail.gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CA+G9fYuJtUV_Z4x74qYZDDOkbHP3SJbGvHskFNnsOCxOmPvr=Q@mail.gmail.com>

On Mon, Jun 03, 2024 at 07:39:24PM +0530, Naresh Kamboju wrote:
> The following kernel null pointer dereference is noticed on qemu-arm64
> while running
> kunit tests with the Linux next-20240603 tag kernel.
> 
> This is always reproducible and the system is stable after this.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

These are intentional...  The function name just changed so it's showing
up as a new bug.  I tried to add a big printk before this NULL
dereference but the printk message never showed up in dmesg...

+       kunit_info(test, "Testing that a NULL dereference causes a test failure\n");
+       kunit_info(test, "*** This will lead to an intentional stack trace ***\n");

regards,
dan carpenter