linux-kernel - Re: [PATCH v5] char: misc: add test cases

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Message-ID: <aHCzX46E+RcXuqWU@xsang-OptiPlex-9020>
Date: Fri, 11 Jul 2025 14:46:55 +0800
From: Oliver Sang <oliver.sang@...el.com>
To: Thadeu Lima de Souza Cascardo <cascardo@...lia.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Andrew Morton <akpm@...ux-foundation.org>,
	"Dirk VanDerMerwe" <dirk.vandermerwe@...hos.com>, Vimal Agrawal
	<vimal.agrawal@...hos.com>, <kernel-dev@...lia.com>, <oliver.sang@...el.com>
Subject: Re: [PATCH v5] char: misc: add test cases

hi, Cascardo,

On Wed, Jul 09, 2025 at 10:23:38AM -0300, Thadeu Lima de Souza Cascardo wrote:
> On Wed, Jul 09, 2025 at 09:14:04PM +0800, kernel test robot wrote:
> > Hello,
> > 
> > kernel test robot noticed "sysfs:cannot_create_duplicate_filename" on:
> > 
> > commit: 127b049d35f10765f429aa2a97aa649ea9ac0b2f ("[PATCH v5] char: misc: add test cases")
> > url: https://github.com/intel-lab-lkp/linux/commits/Thadeu-Lima-de-Souza-Cascardo/char-misc-add-test-cases/20250613-013440
> > patch link: https://lore.kernel.org/all/20250612-misc-dynrange-v5-1-6f35048f7273@igalia.com/
> > patch subject: [PATCH v5] char: misc: add test cases
> > 
> > in testcase: kunit
> > version: 
> > with following parameters:
> > 
> > 	group: group-00
> > 
> > 
> > 
> > config: x86_64-rhel-9.4-kunit
> > compiler: gcc-12
> > test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 16G memory
> > 
> > (please refer to attached dmesg/kmsg for entire log/backtrace)
> > 
> > 
> > 
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <oliver.sang@...el.com>
> > | Closes: https://lore.kernel.org/oe-lkp/202507091056.5d48c1a2-lkp@intel.com
> > 
> > 
> > [  112.908177][    T1]         ok 2 upper static range, bottom
> > [  112.914070][    T1]         ok 3 lower static range, bottom
> > [  112.920216][    T1]         ok 4 upper static range, top
> > [  112.925861][    T1]     # miscdev_test_duplicate_minor: pass:4 fail:0 skip:0 total:4
> > [  112.931240][    T1]     ok 5 miscdev_test_duplicate_minor
> > [  112.939321][ T2928] sysfs: cannot create duplicate filename '/devices/virtual/misc/misc1'
> > [  112.953103][ T2928] CPU: 0 UID: 0 PID: 2928 Comm: kunit_try_catch Tainted: G S               N  6.16.0-rc1-00001-g127b049d35f1 #1 PREEMPT(voluntary)
> > [  112.953110][ T2928] Tainted: [S]=CPU_OUT_OF_SPEC, [N]=TEST
> > [  112.953111][ T2928] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A05 12/05/2013
> > [  112.953113][ T2928] Call Trace:
> > [  112.953115][ T2928]  <TASK>
> > [ 112.953117][ T2928] dump_stack_lvl (kbuild/src/consumer/lib/dump_stack.c:123 (discriminator 1)) 
> > [ 112.953124][ T2928] sysfs_warn_dup (kbuild/src/consumer/fs/sysfs/dir.c:32 (discriminator 1)) 
> > [ 112.953129][ T2928] sysfs_create_dir_ns (kbuild/src/consumer/fs/sysfs/dir.c:63) 
> > [ 112.953133][ T2928] ? __pfx_sysfs_create_dir_ns (kbuild/src/consumer/fs/sysfs/dir.c:41) 
> > 
> > 
> > The kernel config and materials to reproduce are available at:
> > https://download.01.org/0day-ci/archive/20250709/202507091056.5d48c1a2-lkp@intel.com
> > 
> > 
> > -- 
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki
> 
> This failure is intentional, it is part of the test. How can we make the
> robot ignore it in this specific instance?

got it, we will avoid the report for this specific instance in the future.

> 
> Regards.
> Cascardo.