linux-kernel - drivers/scsi/qedf/qedf_debugfs.c:113:23: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Fri, 3 Jul 2020 04:50:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/scsi/qedf/qedf_debugfs.c:113:23: sparse: sparse: incorrect
 type in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd77006e01b3198c75fb7819b3d0ff89709539bb
commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces
date:   2 weeks ago
config: x86_64-randconfig-s021-20200703 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-3-gfa153962-dirty
        git checkout 670d0a4b10704667765f7d18f7592993d02783aa
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/scsi/qedf/qedf_debugfs.c:113:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected char *buf @@     got char [noderef] __user *buffer @@
   drivers/scsi/qedf/qedf_debugfs.c:113:23: sparse:     expected char *buf
>> drivers/scsi/qedf/qedf_debugfs.c:113:23: sparse:     got char [noderef] __user *buffer
>> drivers/scsi/qedf/qedf_debugfs.c:119:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected char *buf @@     got char [noderef] __user * @@
   drivers/scsi/qedf/qedf_debugfs.c:119:40: sparse:     expected char *buf
>> drivers/scsi/qedf/qedf_debugfs.c:119:40: sparse:     got char [noderef] __user *
   drivers/scsi/qedf/qedf_debugfs.c:147:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected char *buf @@     got char [noderef] __user *buffer @@
   drivers/scsi/qedf/qedf_debugfs.c:147:23: sparse:     expected char *buf
   drivers/scsi/qedf/qedf_debugfs.c:147:23: sparse:     got char [noderef] __user *buffer
   drivers/scsi/qedf/qedf_debugfs.c:196:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected char *buf @@     got char [noderef] __user *buffer @@
   drivers/scsi/qedf/qedf_debugfs.c:196:23: sparse:     expected char *buf
   drivers/scsi/qedf/qedf_debugfs.c:196:23: sparse:     got char [noderef] __user *buffer

vim +113 drivers/scsi/qedf/qedf_debugfs.c

61d8658b4a435e Dupuis, Chad 2017-02-15   98  
61d8658b4a435e Dupuis, Chad 2017-02-15   99  static ssize_t
61d8658b4a435e Dupuis, Chad 2017-02-15  100  qedf_dbg_fp_int_cmd_read(struct file *filp, char __user *buffer, size_t count,
61d8658b4a435e Dupuis, Chad 2017-02-15  101  			 loff_t *ppos)
61d8658b4a435e Dupuis, Chad 2017-02-15  102  {
61d8658b4a435e Dupuis, Chad 2017-02-15  103  	size_t cnt = 0;
61d8658b4a435e Dupuis, Chad 2017-02-15  104  	int id;
61d8658b4a435e Dupuis, Chad 2017-02-15  105  	struct qedf_fastpath *fp = NULL;
61d8658b4a435e Dupuis, Chad 2017-02-15  106  	struct qedf_dbg_ctx *qedf_dbg =
61d8658b4a435e Dupuis, Chad 2017-02-15  107  				(struct qedf_dbg_ctx *)filp->private_data;
61d8658b4a435e Dupuis, Chad 2017-02-15  108  	struct qedf_ctx *qedf = container_of(qedf_dbg,
61d8658b4a435e Dupuis, Chad 2017-02-15  109  	    struct qedf_ctx, dbg_ctx);
61d8658b4a435e Dupuis, Chad 2017-02-15  110  
61d8658b4a435e Dupuis, Chad 2017-02-15  111  	QEDF_INFO(qedf_dbg, QEDF_LOG_DEBUGFS, "entered\n");
61d8658b4a435e Dupuis, Chad 2017-02-15  112  
61d8658b4a435e Dupuis, Chad 2017-02-15 @113  	cnt = sprintf(buffer, "\nFastpath I/O completions\n\n");
61d8658b4a435e Dupuis, Chad 2017-02-15  114  
61d8658b4a435e Dupuis, Chad 2017-02-15  115  	for (id = 0; id < qedf->num_queues; id++) {
61d8658b4a435e Dupuis, Chad 2017-02-15  116  		fp = &(qedf->fp_array[id]);
61d8658b4a435e Dupuis, Chad 2017-02-15  117  		if (fp->sb_id == QEDF_SB_ID_NULL)
61d8658b4a435e Dupuis, Chad 2017-02-15  118  			continue;
61d8658b4a435e Dupuis, Chad 2017-02-15 @119  		cnt += sprintf((buffer + cnt), "#%d: %lu\n", id,
61d8658b4a435e Dupuis, Chad 2017-02-15  120  			       fp->completions);
61d8658b4a435e Dupuis, Chad 2017-02-15  121  	}
61d8658b4a435e Dupuis, Chad 2017-02-15  122  
61d8658b4a435e Dupuis, Chad 2017-02-15  123  	cnt = min_t(int, count, cnt - *ppos);
61d8658b4a435e Dupuis, Chad 2017-02-15  124  	*ppos += cnt;
61d8658b4a435e Dupuis, Chad 2017-02-15  125  	return cnt;
61d8658b4a435e Dupuis, Chad 2017-02-15  126  }
61d8658b4a435e Dupuis, Chad 2017-02-15  127  

:::::: The code at line 113 was first introduced by commit
:::::: 61d8658b4a435eac729966cc94cdda077a8df5cd scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.

:::::: TO: Dupuis, Chad <chad.dupuis@...ium.com>
:::::: CC: Martin K. Petersen <martin.petersen@...cle.com>

---
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https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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