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

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Date:   Wed, 4 May 2022 09:19:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guowei Du <duguoweisz@...il.com>, jack@...e.cz
Cc:     llvm@...ts.linux.dev, 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! Yet something to improve:

[auto build test ERROR on pcmoore-selinux/next]
[also build test ERROR on linus/master 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: hexagon-randconfig-r041-20220501 (https://download.01.org/0day-ci/archive/20220504/202205040959.SAV6vlzH-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 363b3a645a1e30011cc8da624f13dac5fd915628)
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/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=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> security/security.c:1169:28: error: passing 'const struct path *' to parameter of type 'struct path *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           return fsnotify_path_perm(dir, dentry, MAY_RMDIR);
                                     ^~~
   include/linux/fsnotify.h:83:51: note: passing argument to parameter 'path' here
   static inline int fsnotify_path_perm(struct path *path, struct dentry *dentry, __u32 mask)
                                                     ^
   security/security.c:1180:28: error: passing 'const struct path *' to parameter of type 'struct path *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           return fsnotify_path_perm(dir, dentry, MAY_UNLINK);
                                     ^~~
   include/linux/fsnotify.h:83:51: note: passing argument to parameter 'path' here
   static inline int fsnotify_path_perm(struct path *path, struct dentry *dentry, __u32 mask)
                                                     ^
   2 errors generated.


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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