linux-kernel - Re: [PATCH] fsnotify: add generic perm check for unlink/rmdir

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Message-ID: <202205041421.bHwZBEFK-lkp@intel.com>
Date:   Wed, 4 May 2022 15:01:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guowei Du <duguoweisz@...il.com>, jack@...e.cz
Cc:     kbuild-all@...ts.01.org, amir73il@...il.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        viro@...iv.linux.org.uk, jmorris@...ei.org, serge@...lyn.com,
        ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        linux-security-module@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, paul@...l-moore.com,
        stephen.smalley.work@...il.com, eparis@...isplace.org,
        keescook@...omium.org, anton@...msg.org, ccross@...roid.com,
        tony.luck@...el.com, selinux@...r.kernel.org, duguoweisz@...il.com,
        duguowei <duguowei@...omi.com>
Subject: Re: [PATCH] fsnotify: add generic perm check for unlink/rmdir

Hi Guowei,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on pcmoore-selinux/next]
[also build test WARNING on linus/master jmorris-security/next-testing v5.18-rc5]
[cannot apply to jack-fs/fsnotify next-20220503]
[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/intel-lab-lkp/linux/commits/Guowei-Du/fsnotify-add-generic-perm-check-for-unlink-rmdir/20220504-024310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next
config: h8300-randconfig-s032-20220501 (https://download.01.org/0day-ci/archive/20220504/202205041421.bHwZBEFK-lkp@intel.com/config)
compiler: h8300-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/intel-lab-lkp/linux/commit/6f635019bbd2ab22a64e03164c8812a46531966e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Guowei-Du/fsnotify-add-generic-perm-check-for-unlink-rmdir/20220504-024310
        git checkout 6f635019bbd2ab22a64e03164c8812a46531966e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=h8300 SHELL=/bin/bash

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 >>)
   security/security.c:358:25: sparse: sparse: cast removes address space '__rcu' of expression
>> security/security.c:1169:35: sparse: sparse: incorrect type in argument 1 (different modifiers) @@     expected struct path *path @@     got struct path const *dir @@
   security/security.c:1169:35: sparse:     expected struct path *path
   security/security.c:1169:35: sparse:     got struct path const *dir
   security/security.c:1180:35: sparse: sparse: incorrect type in argument 1 (different modifiers) @@     expected struct path *path @@     got struct path const *dir @@
   security/security.c:1180:35: sparse:     expected struct path *path
   security/security.c:1180:35: sparse:     got struct path const *dir

vim +1169 security/security.c

  1160	
  1161	int security_path_rmdir(const struct path *dir, struct dentry *dentry)
  1162	{
  1163		int ret;
  1164		if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
  1165			return 0;
  1166		ret = call_int_hook(path_rmdir, 0, dir, dentry);
  1167		if (ret)
  1168			return ret;
> 1169		return fsnotify_path_perm(dir, dentry, MAY_RMDIR);
  1170	}
  1171	

-- 
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https://01.org/lkp