Date:   Fri, 26 Nov 2021 17:36:20 +0800
From:   Baoquan He <bhe@redhat.com>
To:     kernel test robot <lkp@intel.com>
Cc:     linux-kernel@vger.kernel.org, kbuild-all@lists.01.org,
        linux-s390@vger.kernel.org, kexec@lists.infradead.org,
        hca@linux.ibm.com, prudo@redhat.com
Subject: Re: [PATCH v2 1/2] s390/kexec: check the return value of
 ipl_report_finish
Message-ID: <20211126093620.GK21646@MiWiFi-R3L-srv>
References: <20211116032557.14075-1-bhe@redhat.com>
 <202111261649.WZQbFG5g-lkp@intel.com>
MIME-Version: 1.0
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In-Reply-To: <202111261649.WZQbFG5g-lkp@intel.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

Hi,

On 11/26/21 at 04:21pm, kernel test robot wrote:
> Hi Baoquan,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on s390/features]
> [also build test WARNING on kvms390/next]
> [cannot apply to linux/master linus/master v5.16-rc2 next-20211126]
> [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]
> 
> url:    https://github.com/0day-ci/linux/commits/Baoquan-He/s390-kexec-check-the-return-value-of-ipl_report_finish/20211116-112827
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features
> config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20211126/202111261649.WZQbFG5g-lkp@intel.com/config)
> compiler: s390-linux-gcc (GCC) 11.2.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/0day-ci/linux/commit/27ed543b2d76a1d948c64d4404c180ba31ca8cff
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Baoquan-He/s390-kexec-check-the-return-value-of-ipl_report_finish/20211116-112827
>         git checkout 27ed543b2d76a1d948c64d4404c180ba31ca8cff
>         # save the config file to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=s390 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
>    arch/s390/kernel/ipl.c: In function 'ipl_report_finish':
> >> arch/s390/kernel/ipl.c:2159:24: warning: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion]
>     2159 |                 return ERR_PTR(-ENOMEM);
>          |                        ^~~~~~~~~~~~~~~~
S390 maintainer has taken another way to fix the issue, so this patch
1/1 is dropped, then this issue identified by lkp doesn't exist any
more. 

> 
> 
> vim +2159 arch/s390/kernel/ipl.c
> 
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2146  
> 27ed543b2d76a1 Baoquan He         2021-11-16  2147  int ipl_report_finish(struct ipl_report *report, void **ipl_buf)
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2148  {
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2149  	struct ipl_report_certificate *cert;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2150  	struct ipl_report_component *comp;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2151  	struct ipl_rb_certificates *certs;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2152  	struct ipl_parameter_block *ipib;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2153  	struct ipl_rb_components *comps;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2154  	struct ipl_rl_hdr *rl_hdr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2155  	void *buf, *ptr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2156  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2157  	buf = vzalloc(report->size);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2158  	if (!buf)
> 937347ac56bfca Martin Schwidefsky 2019-02-25 @2159  		return ERR_PTR(-ENOMEM);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2160  	ptr = buf;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2161  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2162  	memcpy(ptr, report->ipib, report->ipib->hdr.len);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2163  	ipib = ptr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2164  	if (ipl_secure_flag)
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2165  		ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2166  	ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2167  	ptr += report->ipib->hdr.len;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2168  	ptr = PTR_ALIGN(ptr, 8);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2169  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2170  	rl_hdr = ptr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2171  	ptr += sizeof(*rl_hdr);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2172  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2173  	comps = ptr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2174  	comps->rbt = IPL_RBT_COMPONENTS;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2175  	ptr += sizeof(*comps);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2176  	list_for_each_entry(comp, &report->components, list) {
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2177  		memcpy(ptr, &comp->entry, sizeof(comp->entry));
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2178  		ptr += sizeof(comp->entry);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2179  	}
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2180  	comps->len = ptr - (void *)comps;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2181  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2182  	certs = ptr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2183  	certs->rbt = IPL_RBT_CERTIFICATES;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2184  	ptr += sizeof(*certs);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2185  	list_for_each_entry(cert, &report->certificates, list) {
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2186  		memcpy(ptr, &cert->entry, sizeof(cert->entry));
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2187  		ptr += sizeof(cert->entry);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2188  	}
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2189  	certs->len = ptr - (void *)certs;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2190  	rl_hdr->len = ptr - (void *)rl_hdr;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2191  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2192  	list_for_each_entry(cert, &report->certificates, list) {
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2193  		memcpy(ptr, cert->key, cert->entry.len);
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2194  		ptr += cert->entry.len;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2195  	}
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2196  
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2197  	BUG_ON(ptr > buf + report->size);
> 27ed543b2d76a1 Baoquan He         2021-11-16  2198  	*ipl_buf = buf;
> 27ed543b2d76a1 Baoquan He         2021-11-16  2199  
> 27ed543b2d76a1 Baoquan He         2021-11-16  2200  	return 0;
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2201  }
> 937347ac56bfca Martin Schwidefsky 2019-02-25  2202  
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>