linux-kernel - Re: [PATCH 1/5] security, overlayfs: provide copy up security hook for unioned files

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Date:	Wed, 6 Jul 2016 01:20:34 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	kbuild-all@...org, miklos@...redi.hu, sds@...ho.nsa.gov,
	linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org,
	linux-security-module@...r.kernel.org, dwalsh@...hat.com,
	dhowells@...hat.com, pmoore@...hat.com, viro@...IV.linux.org.uk,
	vgoyal@...hat.com, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/5] security, overlayfs: provide copy up security hook
 for unioned files

Hi,

[auto build test WARNING on miklos-vfs/overlayfs-next]
[also build test WARNING on v4.7-rc6 next-20160705]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Vivek-Goyal/Overlayfs-SELinux-Support/20160706-000037
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-next
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
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=m68k 

All warnings (new ones prefixed by >>):

   fs/overlayfs/copy_up.c: In function 'ovl_copy_up_locked':
>> fs/overlayfs/copy_up.c:262:8: warning: passing argument 2 of 'security_inode_copy_up' from incompatible pointer type
     err = security_inode_copy_up(dentry, &old_creds);
           ^
   In file included from fs/overlayfs/copy_up.c:16:0:
   include/linux/security.h:762:19: note: expected 'struct dentry *' but argument is of type 'const struct cred **'
    static inline int security_inode_copy_up(struct dentry *src, struct dentry *dst)
                      ^

vim +/security_inode_copy_up +262 fs/overlayfs/copy_up.c

   246		struct dentry *upper = NULL;
   247		umode_t mode = stat->mode;
   248		int err;
   249		const struct cred *old_creds = NULL;
   250	
   251		newdentry = ovl_lookup_temp(workdir, dentry);
   252		err = PTR_ERR(newdentry);
   253		if (IS_ERR(newdentry))
   254			goto out;
   255	
   256		upper = lookup_one_len(dentry->d_name.name, upperdir,
   257				       dentry->d_name.len);
   258		err = PTR_ERR(upper);
   259		if (IS_ERR(upper))
   260			goto out1;
   261	
 > 262		err = security_inode_copy_up(dentry, &old_creds);
   263		if (err < 0)
   264			goto out2;
   265	
   266		/* Can't properly set mode on creation because of the umask */
   267		stat->mode &= S_IFMT;
   268		err = ovl_create_real(wdir, newdentry, stat, link, NULL, true);
   269		stat->mode = mode;
   270		if (old_creds)

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

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