linux-kernel - Re: [PATCH] drm/panthor: Fix UAF race between device unplug and FW event processing

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Message-ID: <202510100644.YPzFXMEb-lkp@intel.com>
Date: Fri, 10 Oct 2025 06:18:19 +0800
From: kernel test robot <lkp@...el.com>
To: Ketil Johnsen <ketil.johnsen@....com>,
	Boris Brezillon <bbrezillon@...nel.org>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: oe-kbuild-all@...ts.linux.dev, Ketil Johnsen <ketil.johnsen@....com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/panthor: Fix UAF race between device unplug and FW
 event processing

Hi Ketil,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on linus/master v6.17 next-20251009]
[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/Ketil-Johnsen/drm-panthor-Fix-UAF-race-between-device-unplug-and-FW-event-processing/20251009-184851
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20251008105322.4077661-1-ketil.johnsen%40arm.com
patch subject: [PATCH] drm/panthor: Fix UAF race between device unplug and FW event processing
config: i386-buildonly-randconfig-001-20251010 (https://download.01.org/0day-ci/archive/20251010/202510100644.YPzFXMEb-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251010/202510100644.YPzFXMEb-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/202510100644.YPzFXMEb-lkp@intel.com/

All warnings (new ones prefixed by >>):

   Warning: drivers/gpu/drm/panthor/panthor_sched.c:1788 function parameter 'ptdev' not described in 'panthor_sched_report_fw_events'
   Warning: drivers/gpu/drm/panthor/panthor_sched.c:1788 function parameter 'events' not described in 'panthor_sched_report_fw_events'
>> Warning: drivers/gpu/drm/panthor/panthor_sched.c:1800 function parameter 'ptdev' not described in 'panthor_sched_stop_fw_events'
   Warning: drivers/gpu/drm/panthor/panthor_sched.c:2693 function parameter 'ptdev' not described in 'panthor_sched_report_mmu_fault'

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