linux-kernel - Re: [PATCH v4 4/6] kfuzztest: add KFuzzTest sample fuzz targets

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Message-ID: <202601130828.lXrl0Ijb-lkp@intel.com>
Date: Tue, 13 Jan 2026 10:17:53 +0800
From: kernel test robot <lkp@...el.com>
To: Ethan Graham <ethan.w.s.graham@...il.com>, glider@...gle.com
Cc: oe-kbuild-all@...ts.linux.dev, akpm@...ux-foundation.org,
	andreyknvl@...il.com, andy@...nel.org, andy.shevchenko@...il.com,
	brauner@...nel.org, brendan.higgins@...ux.dev, davem@...emloft.net,
	davidgow@...gle.com, dhowells@...hat.com, dvyukov@...gle.com,
	ebiggers@...nel.org, elver@...gle.com, gregkh@...uxfoundation.org,
	herbert@...dor.apana.org.au, ignat@...udflare.com, jack@...e.cz,
	jannh@...gle.com, johannes@...solutions.net,
	kasan-dev@...glegroups.com, kees@...nel.org,
	kunit-dev@...glegroups.com, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, lukas@...ner.de,
	mcgrof@...nel.org, rmoar@...gle.com, shuah@...nel.org
Subject: Re: [PATCH v4 4/6] kfuzztest: add KFuzzTest sample fuzz targets

Hi Ethan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-nonmm-unstable]
[also build test WARNING on herbert-cryptodev-2.6/master herbert-crypto-2.6/master linus/master v6.19-rc5 next-20260109]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ethan-Graham/kfuzztest-add-user-facing-API-and-data-structures/20260113-033045
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
patch link:    https://lore.kernel.org/r/20260112192827.25989-5-ethan.w.s.graham%40gmail.com
patch subject: [PATCH v4 4/6] kfuzztest: add KFuzzTest sample fuzz targets
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20260113/202601130828.lXrl0Ijb-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260113/202601130828.lXrl0Ijb-lkp@intel.com/reproduce)

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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601130828.lXrl0Ijb-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> Warning: samples/kfuzztest/underflow_on_buffer.c:24 function parameter 'buf' not described in 'underflow_on_buffer'
>> Warning: samples/kfuzztest/underflow_on_buffer.c:24 function parameter 'buflen' not described in 'underflow_on_buffer'
>> Warning: samples/kfuzztest/underflow_on_buffer.c:24 expecting prototype for test_underflow_on_buffer(). Prototype was for underflow_on_buffer() instead

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki