linux-kernel - Re: [PATCH 08/11] net: bluetooth: change the len parameter of sco_send_frame() to size

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Message-ID: <201510232002.Ho6KB4AC%fengguang.wu@intel.com>
Date:	Fri, 23 Oct 2015 20:30:44 +0800
From:	kbuild test robot <lkp@...el.com>
To:	LABBE Corentin <clabbe.montjoie@...il.com>
Cc:	kbuild-all@...org, davem@...emloft.net, gustavo@...ovan.org,
	johan.hedberg@...il.com, marcel@...tmann.org,
	LABBE Corentin <clabbe.montjoie@...il.com>,
	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 08/11] net: bluetooth: change the len parameter of
 sco_send_frame() to size_t

Hi LABBE,

[auto build test WARNING on net/master -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/LABBE-Corentin/net-change-len-parameter-type-for-memcpy_-to-from-_msg/20151023-201642
config: sparc64-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:277:0,
                    from include/linux/kernel.h:13,
                    from include/linux/list.h:8,
                    from include/linux/module.h:9,
                    from net/bluetooth/sco.c:27:
   net/bluetooth/sco.c: In function 'sco_send_frame':
   include/linux/dynamic_debug.h:64:16: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=]
     static struct _ddebug  __aligned(8)   \
                   ^
   include/linux/dynamic_debug.h:76:2: note: in expansion of macro 'DEFINE_DYNAMIC_DEBUG_METADATA'
     DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);  \
     ^
   include/linux/printk.h:283:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^
   include/net/bluetooth/bluetooth.h:129:26: note: in expansion of macro 'pr_debug'
    #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
                             ^
>> net/bluetooth/sco.c:281:2: note: in expansion of macro 'BT_DBG'
     BT_DBG("sk %p len %d", sk, len);
     ^

vim +/BT_DBG +281 net/bluetooth/sco.c

^1da177e Linus Torvalds  2005-04-16  265  done:
09fd0de5 Gustavo Padovan 2011-06-17  266  	hci_dev_unlock(hdev);
^1da177e Linus Torvalds  2005-04-16  267  	hci_dev_put(hdev);
^1da177e Linus Torvalds  2005-04-16  268  	return err;
^1da177e Linus Torvalds  2005-04-16  269  }
^1da177e Linus Torvalds  2005-04-16  270  
722dd7cd LABBE Corentin  2015-10-23  271  static int sco_send_frame(struct sock *sk, struct msghdr *msg, size_t len)
^1da177e Linus Torvalds  2005-04-16  272  {
^1da177e Linus Torvalds  2005-04-16  273  	struct sco_conn *conn = sco_pi(sk)->conn;
^1da177e Linus Torvalds  2005-04-16  274  	struct sk_buff *skb;
088ce088 Mikel Astiz     2012-04-11  275  	int err;
^1da177e Linus Torvalds  2005-04-16  276  
^1da177e Linus Torvalds  2005-04-16  277  	/* Check outgoing MTU */
^1da177e Linus Torvalds  2005-04-16  278  	if (len > conn->mtu)
^1da177e Linus Torvalds  2005-04-16  279  		return -EINVAL;
^1da177e Linus Torvalds  2005-04-16  280  
^1da177e Linus Torvalds  2005-04-16 @281  	BT_DBG("sk %p len %d", sk, len);
^1da177e Linus Torvalds  2005-04-16  282  
088ce088 Mikel Astiz     2012-04-11  283  	skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
b9dbdbc1 Gustavo Padovan 2010-05-01  284  	if (!skb)
^1da177e Linus Torvalds  2005-04-16  285  		return err;
^1da177e Linus Torvalds  2005-04-16  286  
6ce8e9ce Al Viro         2014-04-06  287  	if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
b9dbdbc1 Gustavo Padovan 2010-05-01  288  		kfree_skb(skb);
b9dbdbc1 Gustavo Padovan 2010-05-01  289  		return -EFAULT;

:::::: The code at line 281 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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