linux-hardening - Re: [PATCH v3 2/7] crash_dump: make dm crypt keys persist for the kdump kernel

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Message-ID: <ZkwSEUEW/RKFLubx@MiWiFi-R3L-srv>
Date: Tue, 21 May 2024 11:20:35 +0800
From: Baoquan He <bhe@...hat.com>
To: Coiby Xu <coxu@...hat.com>
Cc: kernel test robot <lkp@...el.com>, kexec@...ts.infradead.org,
	oe-kbuild-all@...ts.linux.dev, Ondrej Kozina <okozina@...hat.com>,
	Milan Broz <gmazyland@...il.com>,
	Thomas Staudt <tstaudt@...ibm.com>,
	Daniel P . Berrangé <berrange@...hat.com>,
	Kairui Song <ryncsn@...il.com>,
	Jan Pazdziora <jpazdziora@...hat.com>,
	Pingfan Liu <kernelfans@...il.com>, Dave Young <dyoung@...hat.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Dave Hansen <dave.hansen@...el.com>,
	Vitaly Kuznetsov <vkuznets@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>, Kees Cook <keescook@...omium.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	"(open list:KERNEL HARDENING (not covered by other areas):Keyword:b__counted_byb)" <linux-hardening@...r.kernel.org>
Subject: Re: [PATCH v3 2/7] crash_dump: make dm crypt keys persist for the
 kdump kernel

On 04/26/24 at 09:10pm, kernel test robot wrote:
> Hi Coiby,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on linus/master]
> [also build test WARNING on v6.9-rc5 next-20240426]
> [cannot apply to tip/x86/core]
> [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/Coiby-Xu/kexec_file-allow-to-place-kexec_buf-randomly/20240425-180836
> base:   linus/master
> patch link:    https://lore.kernel.org/r/20240425100434.198925-3-coxu%40redhat.com
> patch subject: [PATCH v3 2/7] crash_dump: make dm crypt keys persist for the kdump kernel
> config: x86_64-randconfig-r113-20240426 (https://download.01.org/0day-ci/archive/20240426/202404262003.qsWvGwZU-lkp@intel.com/config)
> compiler: gcc-10 (Ubuntu 10.5.0-1ubuntu1) 10.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240426/202404262003.qsWvGwZU-lkp@intel.com/reproduce)


Please respond to the lkp report in time whether it's a problem or not,
otherwise the link will be unavailable.

> 
> 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/202404262003.qsWvGwZU-lkp@intel.com/
> 
> sparse warnings: (new ones prefixed by >>)
> >> kernel/crash_dump_dm_crypt.c:31:3: sparse: sparse: symbol 'keys_header' was not declared. Should it be static?
> 
> vim +/keys_header +31 kernel/crash_dump_dm_crypt.c
> 
>     27	
>     28	struct keys_header {
>     29		unsigned int key_count;
>     30		struct dm_crypt_key keys[] __counted_by(key_count);
>   > 31	} *keys_header;
>     32	
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>